Commit | Line | Data |
a02675cd |
1 | package DBIx::Class::Schema; |
2 | |
3 | use strict; |
4 | use warnings; |
aa562407 |
5 | |
4981dc70 |
6 | use DBIx::Class::Exception; |
70c28808 |
7 | use DBIx::Class::Carp; |
9780718f |
8 | use Try::Tiny; |
6298a324 |
9 | use Scalar::Util 'weaken'; |
6298a324 |
10 | use Sub::Name 'subname'; |
3b80fa31 |
11 | use B 'svref_2object'; |
fd323bf1 |
12 | use namespace::clean; |
a02675cd |
13 | |
41a6f8c0 |
14 | use base qw/DBIx::Class/; |
a02675cd |
15 | |
0dc79249 |
16 | __PACKAGE__->mk_classdata('class_mappings' => {}); |
17 | __PACKAGE__->mk_classdata('source_registrations' => {}); |
1e10a11d |
18 | __PACKAGE__->mk_classdata('storage_type' => '::DBI'); |
d7156e50 |
19 | __PACKAGE__->mk_classdata('storage'); |
82cc0386 |
20 | __PACKAGE__->mk_classdata('exception_action'); |
4b946902 |
21 | __PACKAGE__->mk_classdata('stacktrace' => $ENV{DBIC_TRACE} || 0); |
e6c747fd |
22 | __PACKAGE__->mk_classdata('default_resultset_attributes' => {}); |
a02675cd |
23 | |
c2da098a |
24 | =head1 NAME |
25 | |
26 | DBIx::Class::Schema - composable schemas |
27 | |
28 | =head1 SYNOPSIS |
29 | |
24d67825 |
30 | package Library::Schema; |
c2da098a |
31 | use base qw/DBIx::Class::Schema/; |
bab77431 |
32 | |
829517d4 |
33 | # load all Result classes in Library/Schema/Result/ |
34 | __PACKAGE__->load_namespaces(); |
c2da098a |
35 | |
829517d4 |
36 | package Library::Schema::Result::CD; |
d88ecca6 |
37 | use base qw/DBIx::Class::Core/; |
38 | |
39 | __PACKAGE__->load_components(qw/InflateColumn::DateTime/); # for example |
24d67825 |
40 | __PACKAGE__->table('cd'); |
c2da098a |
41 | |
5d9076f2 |
42 | # Elsewhere in your code: |
24d67825 |
43 | my $schema1 = Library::Schema->connect( |
a3d93194 |
44 | $dsn, |
45 | $user, |
46 | $password, |
ef131d82 |
47 | { AutoCommit => 1 }, |
a3d93194 |
48 | ); |
bab77431 |
49 | |
24d67825 |
50 | my $schema2 = Library::Schema->connect($coderef_returning_dbh); |
c2da098a |
51 | |
829517d4 |
52 | # fetch objects using Library::Schema::Result::DVD |
24d67825 |
53 | my $resultset = $schema1->resultset('DVD')->search( ... ); |
54 | my @dvd_objects = $schema2->resultset('DVD')->search( ... ); |
c2da098a |
55 | |
56 | =head1 DESCRIPTION |
57 | |
a3d93194 |
58 | Creates database classes based on a schema. This is the recommended way to |
59 | use L<DBIx::Class> and allows you to use more than one concurrent connection |
60 | with your classes. |
429bd4f1 |
61 | |
03312470 |
62 | NB: If you're used to L<Class::DBI> it's worth reading the L</SYNOPSIS> |
2053ab2a |
63 | carefully, as DBIx::Class does things a little differently. Note in |
03312470 |
64 | particular which module inherits off which. |
65 | |
829517d4 |
66 | =head1 SETUP METHODS |
c2da098a |
67 | |
829517d4 |
68 | =head2 load_namespaces |
87c4e602 |
69 | |
27f01d1f |
70 | =over 4 |
71 | |
829517d4 |
72 | =item Arguments: %options? |
27f01d1f |
73 | |
74 | =back |
076652e8 |
75 | |
829517d4 |
76 | __PACKAGE__->load_namespaces(); |
66d9ef6b |
77 | |
829517d4 |
78 | __PACKAGE__->load_namespaces( |
6f731572 |
79 | result_namespace => 'Res', |
80 | resultset_namespace => 'RSet', |
81 | default_resultset_class => '+MyDB::Othernamespace::RSet', |
82 | ); |
83 | |
84 | With no arguments, this method uses L<Module::Find> to load all of the |
85 | Result and ResultSet classes under the namespace of the schema from |
86 | which it is called. For example, C<My::Schema> will by default find |
87 | and load Result classes named C<My::Schema::Result::*> and ResultSet |
88 | classes named C<My::Schema::ResultSet::*>. |
89 | |
90 | ResultSet classes are associated with Result class of the same name. |
91 | For example, C<My::Schema::Result::CD> will get the ResultSet class |
92 | C<My::Schema::ResultSet::CD> if it is present. |
93 | |
94 | Both Result and ResultSet namespaces are configurable via the |
95 | C<result_namespace> and C<resultset_namespace> options. |
076652e8 |
96 | |
6f731572 |
97 | Another option, C<default_resultset_class> specifies a custom default |
98 | ResultSet class for Result classes with no corresponding ResultSet. |
c2da098a |
99 | |
6f731572 |
100 | All of the namespace and classname options are by default relative to |
101 | the schema classname. To specify a fully-qualified name, prefix it |
102 | with a literal C<+>. For example, C<+Other::NameSpace::Result>. |
103 | |
104 | =head3 Warnings |
74b92d9a |
105 | |
672687db |
106 | You will be warned if ResultSet classes are discovered for which there |
829517d4 |
107 | are no matching Result classes like this: |
87c4e602 |
108 | |
829517d4 |
109 | load_namespaces found ResultSet class $classname with no corresponding Result class |
27f01d1f |
110 | |
829517d4 |
111 | If a Result class is found to already have a ResultSet class set using |
112 | L</resultset_class> to some other class, you will be warned like this: |
27f01d1f |
113 | |
fd323bf1 |
114 | We found ResultSet class '$rs_class' for '$result', but it seems |
829517d4 |
115 | that you had already set '$result' to use '$rs_set' instead |
076652e8 |
116 | |
6f731572 |
117 | =head3 Examples |
2a4d9487 |
118 | |
829517d4 |
119 | # load My::Schema::Result::CD, My::Schema::Result::Artist, |
120 | # My::Schema::ResultSet::CD, etc... |
121 | My::Schema->load_namespaces; |
2a4d9487 |
122 | |
829517d4 |
123 | # Override everything to use ugly names. |
124 | # In this example, if there is a My::Schema::Res::Foo, but no matching |
125 | # My::Schema::RSets::Foo, then Foo will have its |
126 | # resultset_class set to My::Schema::RSetBase |
127 | My::Schema->load_namespaces( |
128 | result_namespace => 'Res', |
129 | resultset_namespace => 'RSets', |
130 | default_resultset_class => 'RSetBase', |
131 | ); |
2a4d9487 |
132 | |
829517d4 |
133 | # Put things in other namespaces |
134 | My::Schema->load_namespaces( |
135 | result_namespace => '+Some::Place::Results', |
136 | resultset_namespace => '+Another::Place::RSets', |
137 | ); |
2a4d9487 |
138 | |
6f731572 |
139 | To search multiple namespaces for either Result or ResultSet classes, |
140 | use an arrayref of namespaces for that option. In the case that the |
141 | same result (or resultset) class exists in multiple namespaces, later |
142 | entries in the list of namespaces will override earlier ones. |
2a4d9487 |
143 | |
829517d4 |
144 | My::Schema->load_namespaces( |
145 | # My::Schema::Results_C::Foo takes precedence over My::Schema::Results_B::Foo : |
146 | result_namespace => [ 'Results_A', 'Results_B', 'Results_C' ], |
147 | resultset_namespace => [ '+Some::Place::RSets', 'RSets' ], |
148 | ); |
2a4d9487 |
149 | |
150 | =cut |
151 | |
829517d4 |
152 | # Pre-pends our classname to the given relative classname or |
153 | # class namespace, unless there is a '+' prefix, which will |
154 | # be stripped. |
155 | sub _expand_relative_name { |
156 | my ($class, $name) = @_; |
157 | return if !$name; |
158 | $name = $class . '::' . $name if ! ($name =~ s/^\+//); |
159 | return $name; |
2a4d9487 |
160 | } |
161 | |
f3405058 |
162 | # Finds all modules in the supplied namespace, or if omitted in the |
163 | # namespace of $class. Untaints all findings as they can be assumed |
164 | # to be safe |
165 | sub _findallmod { |
166 | my $proto = shift; |
167 | my $ns = shift || ref $proto || $proto; |
168 | |
3b80fa31 |
169 | require Module::Find; |
f3405058 |
170 | my @mods = Module::Find::findallmod($ns); |
171 | |
172 | # try to untaint module names. mods where this fails |
173 | # are left alone so we don't have to change the old behavior |
174 | no locale; # localized \w doesn't untaint expression |
175 | return map { $_ =~ m/^( (?:\w+::)* \w+ )$/x ? $1 : $_ } @mods; |
176 | } |
177 | |
829517d4 |
178 | # returns a hash of $shortname => $fullname for every package |
b488020e |
179 | # found in the given namespaces ($shortname is with the $fullname's |
180 | # namespace stripped off) |
829517d4 |
181 | sub _map_namespaces { |
182 | my ($class, @namespaces) = @_; |
6eec9003 |
183 | |
829517d4 |
184 | my @results_hash; |
185 | foreach my $namespace (@namespaces) { |
186 | push( |
187 | @results_hash, |
188 | map { (substr($_, length "${namespace}::"), $_) } |
f3405058 |
189 | $class->_findallmod($namespace) |
829517d4 |
190 | ); |
0dc79249 |
191 | } |
27f01d1f |
192 | |
829517d4 |
193 | @results_hash; |
ea20d0fd |
194 | } |
195 | |
b488020e |
196 | # returns the result_source_instance for the passed class/object, |
197 | # or dies with an informative message (used by load_namespaces) |
198 | sub _ns_get_rsrc_instance { |
dee99c24 |
199 | my $me = shift; |
200 | my $rs_class = ref ($_[0]) || $_[0]; |
201 | |
202 | return try { |
203 | $rs_class->result_source_instance |
204 | } catch { |
205 | $me->throw_exception ( |
206 | "Attempt to load_namespaces() class $rs_class failed - are you sure this is a real Result Class?: $_" |
b488020e |
207 | ); |
dee99c24 |
208 | }; |
b488020e |
209 | } |
210 | |
829517d4 |
211 | sub load_namespaces { |
212 | my ($class, %args) = @_; |
0dc79249 |
213 | |
829517d4 |
214 | my $result_namespace = delete $args{result_namespace} || 'Result'; |
215 | my $resultset_namespace = delete $args{resultset_namespace} || 'ResultSet'; |
216 | my $default_resultset_class = delete $args{default_resultset_class}; |
0dc79249 |
217 | |
829517d4 |
218 | $class->throw_exception('load_namespaces: unknown option(s): ' |
219 | . join(q{,}, map { qq{'$_'} } keys %args)) |
220 | if scalar keys %args; |
0dc79249 |
221 | |
829517d4 |
222 | $default_resultset_class |
223 | = $class->_expand_relative_name($default_resultset_class); |
9b1ba0f2 |
224 | |
829517d4 |
225 | for my $arg ($result_namespace, $resultset_namespace) { |
226 | $arg = [ $arg ] if !ref($arg) && $arg; |
9b1ba0f2 |
227 | |
829517d4 |
228 | $class->throw_exception('load_namespaces: namespace arguments must be ' |
229 | . 'a simple string or an arrayref') |
230 | if ref($arg) ne 'ARRAY'; |
9b1ba0f2 |
231 | |
829517d4 |
232 | $_ = $class->_expand_relative_name($_) for (@$arg); |
233 | } |
ea20d0fd |
234 | |
829517d4 |
235 | my %results = $class->_map_namespaces(@$result_namespace); |
236 | my %resultsets = $class->_map_namespaces(@$resultset_namespace); |
27f01d1f |
237 | |
829517d4 |
238 | my @to_register; |
239 | { |
87bf71d5 |
240 | no warnings qw/redefine/; |
241 | local *Class::C3::reinitialize = sub { } if DBIx::Class::_ENV_::OLD_MRO; |
242 | use warnings qw/redefine/; |
27f01d1f |
243 | |
3988ce40 |
244 | # ensure classes are loaded and attached in inheritance order |
f5ef5fa1 |
245 | for my $res (values %results) { |
246 | $class->ensure_class_loaded($res); |
247 | } |
3988ce40 |
248 | my %inh_idx; |
249 | my @subclass_last = sort { |
250 | |
251 | ($inh_idx{$a} ||= |
252 | scalar @{mro::get_linear_isa( $results{$a} )} |
253 | ) |
254 | |
255 | <=> |
256 | |
257 | ($inh_idx{$b} ||= |
258 | scalar @{mro::get_linear_isa( $results{$b} )} |
259 | ) |
260 | |
261 | } keys(%results); |
262 | |
3d27f771 |
263 | foreach my $result (@subclass_last) { |
829517d4 |
264 | my $result_class = $results{$result}; |
82b01c38 |
265 | |
829517d4 |
266 | my $rs_class = delete $resultsets{$result}; |
b488020e |
267 | my $rs_set = $class->_ns_get_rsrc_instance ($result_class)->resultset_class; |
3988ce40 |
268 | |
829517d4 |
269 | if($rs_set && $rs_set ne 'DBIx::Class::ResultSet') { |
3d27f771 |
270 | if($rs_class && $rs_class ne $rs_set) { |
341d5ede |
271 | carp "We found ResultSet class '$rs_class' for '$result', but it seems " |
829517d4 |
272 | . "that you had already set '$result' to use '$rs_set' instead"; |
273 | } |
274 | } |
275 | elsif($rs_class ||= $default_resultset_class) { |
276 | $class->ensure_class_loaded($rs_class); |
1d3108a4 |
277 | if(!$rs_class->isa("DBIx::Class::ResultSet")) { |
278 | carp "load_namespaces found ResultSet class $rs_class that does not subclass DBIx::Class::ResultSet"; |
279 | } |
280 | |
b488020e |
281 | $class->_ns_get_rsrc_instance ($result_class)->resultset_class($rs_class); |
829517d4 |
282 | } |
82b01c38 |
283 | |
b488020e |
284 | my $source_name = $class->_ns_get_rsrc_instance ($result_class)->source_name || $result; |
0e6c5d58 |
285 | |
286 | push(@to_register, [ $source_name, $result_class ]); |
829517d4 |
287 | } |
288 | } |
ea20d0fd |
289 | |
829517d4 |
290 | foreach (sort keys %resultsets) { |
341d5ede |
291 | carp "load_namespaces found ResultSet class $_ with no " |
829517d4 |
292 | . 'corresponding Result class'; |
293 | } |
ea20d0fd |
294 | |
87bf71d5 |
295 | Class::C3->reinitialize if DBIx::Class::_ENV_::OLD_MRO; |
296 | |
829517d4 |
297 | $class->register_class(@$_) for (@to_register); |
ea20d0fd |
298 | |
829517d4 |
299 | return; |
ea20d0fd |
300 | } |
301 | |
87c4e602 |
302 | =head2 load_classes |
303 | |
27f01d1f |
304 | =over 4 |
305 | |
306 | =item Arguments: @classes?, { $namespace => [ @classes ] }+ |
307 | |
308 | =back |
076652e8 |
309 | |
1ab61457 |
310 | L</load_classes> is an alternative method to L</load_namespaces>, both of |
311 | which serve similar purposes, each with different advantages and disadvantages. |
312 | In the general case you should use L</load_namespaces>, unless you need to |
313 | be able to specify that only specific classes are loaded at runtime. |
829517d4 |
314 | |
82b01c38 |
315 | With no arguments, this method uses L<Module::Find> to find all classes under |
316 | the schema's namespace. Otherwise, this method loads the classes you specify |
317 | (using L<use>), and registers them (using L</"register_class">). |
076652e8 |
318 | |
2053ab2a |
319 | It is possible to comment out classes with a leading C<#>, but note that perl |
320 | will think it's a mistake (trying to use a comment in a qw list), so you'll |
321 | need to add C<no warnings 'qw';> before your load_classes call. |
5ce32fc1 |
322 | |
829517d4 |
323 | If any classes found do not appear to be Result class files, you will |
324 | get the following warning: |
325 | |
fd323bf1 |
326 | Failed to load $comp_class. Can't find source_name method. Is |
829517d4 |
327 | $comp_class really a full DBIC result class? Fix it, move it elsewhere, |
328 | or make your load_classes call more specific. |
329 | |
2053ab2a |
330 | Example: |
82b01c38 |
331 | |
332 | My::Schema->load_classes(); # loads My::Schema::CD, My::Schema::Artist, |
75d07914 |
333 | # etc. (anything under the My::Schema namespace) |
82b01c38 |
334 | |
335 | # loads My::Schema::CD, My::Schema::Artist, Other::Namespace::Producer but |
336 | # not Other::Namespace::LinerNotes nor My::Schema::Track |
337 | My::Schema->load_classes(qw/ CD Artist #Track /, { |
338 | Other::Namespace => [qw/ Producer #LinerNotes /], |
339 | }); |
340 | |
076652e8 |
341 | =cut |
342 | |
a02675cd |
343 | sub load_classes { |
5ce32fc1 |
344 | my ($class, @params) = @_; |
bab77431 |
345 | |
5ce32fc1 |
346 | my %comps_for; |
bab77431 |
347 | |
5ce32fc1 |
348 | if (@params) { |
349 | foreach my $param (@params) { |
350 | if (ref $param eq 'ARRAY') { |
351 | # filter out commented entries |
352 | my @modules = grep { $_ !~ /^#/ } @$param; |
bab77431 |
353 | |
5ce32fc1 |
354 | push (@{$comps_for{$class}}, @modules); |
355 | } |
356 | elsif (ref $param eq 'HASH') { |
357 | # more than one namespace possible |
358 | for my $comp ( keys %$param ) { |
359 | # filter out commented entries |
360 | my @modules = grep { $_ !~ /^#/ } @{$param->{$comp}}; |
361 | |
362 | push (@{$comps_for{$comp}}, @modules); |
363 | } |
364 | } |
365 | else { |
366 | # filter out commented entries |
367 | push (@{$comps_for{$class}}, $param) if $param !~ /^#/; |
368 | } |
369 | } |
370 | } else { |
bc0c9800 |
371 | my @comp = map { substr $_, length "${class}::" } |
f3405058 |
372 | $class->_findallmod; |
5ce32fc1 |
373 | $comps_for{$class} = \@comp; |
41a6f8c0 |
374 | } |
5ce32fc1 |
375 | |
e6efde04 |
376 | my @to_register; |
377 | { |
378 | no warnings qw/redefine/; |
87bf71d5 |
379 | local *Class::C3::reinitialize = sub { } if DBIx::Class::_ENV_::OLD_MRO; |
380 | use warnings qw/redefine/; |
381 | |
e6efde04 |
382 | foreach my $prefix (keys %comps_for) { |
383 | foreach my $comp (@{$comps_for{$prefix}||[]}) { |
384 | my $comp_class = "${prefix}::${comp}"; |
c037c03a |
385 | $class->ensure_class_loaded($comp_class); |
bab77431 |
386 | |
89271e56 |
387 | my $snsub = $comp_class->can('source_name'); |
388 | if(! $snsub ) { |
341d5ede |
389 | carp "Failed to load $comp_class. Can't find source_name method. Is $comp_class really a full DBIC result class? Fix it, move it elsewhere, or make your load_classes call more specific."; |
89271e56 |
390 | next; |
391 | } |
392 | $comp = $snsub->($comp_class) || $comp; |
393 | |
93405cf0 |
394 | push(@to_register, [ $comp, $comp_class ]); |
bfb2bd4f |
395 | } |
5ce32fc1 |
396 | } |
a02675cd |
397 | } |
87bf71d5 |
398 | Class::C3->reinitialize if DBIx::Class::_ENV_::OLD_MRO; |
e6efde04 |
399 | |
400 | foreach my $to (@to_register) { |
401 | $class->register_class(@$to); |
e6efde04 |
402 | } |
a02675cd |
403 | } |
404 | |
829517d4 |
405 | =head2 storage_type |
2374c5ff |
406 | |
407 | =over 4 |
408 | |
829517d4 |
409 | =item Arguments: $storage_type|{$storage_type, \%args} |
410 | |
411 | =item Return value: $storage_type|{$storage_type, \%args} |
412 | |
413 | =item Default value: DBIx::Class::Storage::DBI |
2374c5ff |
414 | |
415 | =back |
416 | |
829517d4 |
417 | Set the storage class that will be instantiated when L</connect> is called. |
418 | If the classname starts with C<::>, the prefix C<DBIx::Class::Storage> is |
95787afe |
419 | assumed by L</connect>. |
2374c5ff |
420 | |
829517d4 |
421 | You want to use this to set subclasses of L<DBIx::Class::Storage::DBI> |
95787afe |
422 | in cases where the appropriate subclass is not autodetected. |
85bd0538 |
423 | |
829517d4 |
424 | If your storage type requires instantiation arguments, those are |
425 | defined as a second argument in the form of a hashref and the entire |
426 | value needs to be wrapped into an arrayref or a hashref. We support |
427 | both types of refs here in order to play nice with your |
428 | Config::[class] or your choice. See |
429 | L<DBIx::Class::Storage::DBI::Replicated> for an example of this. |
0f4ec1d2 |
430 | |
829517d4 |
431 | =head2 exception_action |
f017c022 |
432 | |
829517d4 |
433 | =over 4 |
0f4ec1d2 |
434 | |
829517d4 |
435 | =item Arguments: $code_reference |
f017c022 |
436 | |
829517d4 |
437 | =item Return value: $code_reference |
85bd0538 |
438 | |
829517d4 |
439 | =item Default value: None |
2374c5ff |
440 | |
829517d4 |
441 | =back |
f017c022 |
442 | |
c3e9f718 |
443 | When L</throw_exception> is invoked and L</exception_action> is set to a code |
444 | reference, this reference will be called instead of |
445 | L<DBIx::Class::Exception/throw>, with the exception message passed as the only |
446 | argument. |
f017c022 |
447 | |
c3e9f718 |
448 | Your custom throw code B<must> rethrow the exception, as L</throw_exception> is |
449 | an integral part of DBIC's internal execution control flow. |
f017c022 |
450 | |
829517d4 |
451 | Example: |
f017c022 |
452 | |
829517d4 |
453 | package My::Schema; |
454 | use base qw/DBIx::Class::Schema/; |
455 | use My::ExceptionClass; |
456 | __PACKAGE__->exception_action(sub { My::ExceptionClass->throw(@_) }); |
457 | __PACKAGE__->load_classes; |
2374c5ff |
458 | |
829517d4 |
459 | # or: |
460 | my $schema_obj = My::Schema->connect( .... ); |
461 | $schema_obj->exception_action(sub { My::ExceptionClass->throw(@_) }); |
0f4ec1d2 |
462 | |
829517d4 |
463 | =head2 stacktrace |
f017c022 |
464 | |
829517d4 |
465 | =over 4 |
2374c5ff |
466 | |
829517d4 |
467 | =item Arguments: boolean |
2374c5ff |
468 | |
829517d4 |
469 | =back |
2374c5ff |
470 | |
829517d4 |
471 | Whether L</throw_exception> should include stack trace information. |
472 | Defaults to false normally, but defaults to true if C<$ENV{DBIC_TRACE}> |
473 | is true. |
0f4ec1d2 |
474 | |
829517d4 |
475 | =head2 sqlt_deploy_hook |
0f4ec1d2 |
476 | |
829517d4 |
477 | =over |
0f4ec1d2 |
478 | |
829517d4 |
479 | =item Arguments: $sqlt_schema |
2374c5ff |
480 | |
829517d4 |
481 | =back |
2374c5ff |
482 | |
fd323bf1 |
483 | An optional sub which you can declare in your own Schema class that will get |
829517d4 |
484 | passed the L<SQL::Translator::Schema> object when you deploy the schema via |
485 | L</create_ddl_dir> or L</deploy>. |
0f4ec1d2 |
486 | |
fd323bf1 |
487 | For an example of what you can do with this, see |
829517d4 |
488 | L<DBIx::Class::Manual::Cookbook/Adding Indexes And Functions To Your SQL>. |
fdcd8145 |
489 | |
2d7d8459 |
490 | Note that sqlt_deploy_hook is called by L</deployment_statements>, which in turn |
491 | is called before L</deploy>. Therefore the hook can be used only to manipulate |
492 | the L<SQL::Translator::Schema> object before it is turned into SQL fed to the |
493 | database. If you want to execute post-deploy statements which can not be generated |
494 | by L<SQL::Translator>, the currently suggested method is to overload L</deploy> |
495 | and use L<dbh_do|DBIx::Class::Storage::DBI/dbh_do>. |
496 | |
829517d4 |
497 | =head1 METHODS |
2374c5ff |
498 | |
829517d4 |
499 | =head2 connect |
87c4e602 |
500 | |
27f01d1f |
501 | =over 4 |
502 | |
829517d4 |
503 | =item Arguments: @connectinfo |
429bd4f1 |
504 | |
d601dc88 |
505 | =item Return Value: $new_schema |
27f01d1f |
506 | |
507 | =back |
076652e8 |
508 | |
829517d4 |
509 | Creates and returns a new Schema object. The connection info set on it |
510 | is used to create a new instance of the storage backend and set it on |
511 | the Schema object. |
1c133e22 |
512 | |
829517d4 |
513 | See L<DBIx::Class::Storage::DBI/"connect_info"> for DBI-specific |
5d52945a |
514 | syntax on the C<@connectinfo> argument, or L<DBIx::Class::Storage> in |
829517d4 |
515 | general. |
1c133e22 |
516 | |
5d52945a |
517 | Note that C<connect_info> expects an arrayref of arguments, but |
faaba25f |
518 | C<connect> does not. C<connect> wraps its arguments in an arrayref |
5d52945a |
519 | before passing them to C<connect_info>. |
520 | |
4c7d99ca |
521 | =head3 Overloading |
522 | |
523 | C<connect> is a convenience method. It is equivalent to calling |
524 | $schema->clone->connection(@connectinfo). To write your own overloaded |
525 | version, overload L</connection> instead. |
526 | |
076652e8 |
527 | =cut |
528 | |
829517d4 |
529 | sub connect { shift->clone->connection(@_) } |
e678398e |
530 | |
829517d4 |
531 | =head2 resultset |
77254782 |
532 | |
27f01d1f |
533 | =over 4 |
534 | |
829517d4 |
535 | =item Arguments: $source_name |
82b01c38 |
536 | |
829517d4 |
537 | =item Return Value: $resultset |
27f01d1f |
538 | |
539 | =back |
13765dad |
540 | |
829517d4 |
541 | my $rs = $schema->resultset('DVD'); |
82b01c38 |
542 | |
829517d4 |
543 | Returns the L<DBIx::Class::ResultSet> object for the registered source |
544 | name. |
77254782 |
545 | |
546 | =cut |
547 | |
829517d4 |
548 | sub resultset { |
549 | my ($self, $moniker) = @_; |
73d47f9f |
550 | $self->throw_exception('resultset() expects a source name') |
551 | unless defined $moniker; |
829517d4 |
552 | return $self->source($moniker)->resultset; |
b7951443 |
553 | } |
554 | |
829517d4 |
555 | =head2 sources |
6b43ba5f |
556 | |
557 | =over 4 |
558 | |
829517d4 |
559 | =item Return Value: @source_names |
6b43ba5f |
560 | |
561 | =back |
562 | |
829517d4 |
563 | my @source_names = $schema->sources; |
6b43ba5f |
564 | |
829517d4 |
565 | Lists names of all the sources registered on this Schema object. |
6b43ba5f |
566 | |
829517d4 |
567 | =cut |
161fb223 |
568 | |
829517d4 |
569 | sub sources { return keys %{shift->source_registrations}; } |
106d5f3b |
570 | |
829517d4 |
571 | =head2 source |
87c4e602 |
572 | |
27f01d1f |
573 | =over 4 |
574 | |
829517d4 |
575 | =item Arguments: $source_name |
66d9ef6b |
576 | |
829517d4 |
577 | =item Return Value: $result_source |
27f01d1f |
578 | |
579 | =back |
82b01c38 |
580 | |
829517d4 |
581 | my $source = $schema->source('Book'); |
85f78622 |
582 | |
829517d4 |
583 | Returns the L<DBIx::Class::ResultSource> object for the registered |
584 | source name. |
66d9ef6b |
585 | |
586 | =cut |
587 | |
829517d4 |
588 | sub source { |
f5f2af8f |
589 | my $self = shift; |
590 | |
591 | $self->throw_exception("source() expects a source name") |
592 | unless @_; |
593 | |
594 | my $moniker = shift; |
595 | |
829517d4 |
596 | my $sreg = $self->source_registrations; |
597 | return $sreg->{$moniker} if exists $sreg->{$moniker}; |
598 | |
599 | # if we got here, they probably passed a full class name |
600 | my $mapped = $self->class_mappings->{$moniker}; |
601 | $self->throw_exception("Can't find source for ${moniker}") |
602 | unless $mapped && exists $sreg->{$mapped}; |
603 | return $sreg->{$mapped}; |
161fb223 |
604 | } |
605 | |
829517d4 |
606 | =head2 class |
87c4e602 |
607 | |
27f01d1f |
608 | =over 4 |
609 | |
829517d4 |
610 | =item Arguments: $source_name |
66d9ef6b |
611 | |
829517d4 |
612 | =item Return Value: $classname |
27f01d1f |
613 | |
614 | =back |
82b01c38 |
615 | |
829517d4 |
616 | my $class = $schema->class('CD'); |
617 | |
618 | Retrieves the Result class name for the given source name. |
66d9ef6b |
619 | |
620 | =cut |
621 | |
829517d4 |
622 | sub class { |
623 | my ($self, $moniker) = @_; |
624 | return $self->source($moniker)->result_class; |
625 | } |
08b515f1 |
626 | |
4012acd8 |
627 | =head2 txn_do |
08b515f1 |
628 | |
4012acd8 |
629 | =over 4 |
08b515f1 |
630 | |
4012acd8 |
631 | =item Arguments: C<$coderef>, @coderef_args? |
08b515f1 |
632 | |
4012acd8 |
633 | =item Return Value: The return value of $coderef |
08b515f1 |
634 | |
4012acd8 |
635 | =back |
08b515f1 |
636 | |
4012acd8 |
637 | Executes C<$coderef> with (optional) arguments C<@coderef_args> atomically, |
638 | returning its result (if any). Equivalent to calling $schema->storage->txn_do. |
639 | See L<DBIx::Class::Storage/"txn_do"> for more information. |
08b515f1 |
640 | |
4012acd8 |
641 | This interface is preferred over using the individual methods L</txn_begin>, |
642 | L</txn_commit>, and L</txn_rollback> below. |
08b515f1 |
643 | |
f9f06ae0 |
644 | WARNING: If you are connected with C<< AutoCommit => 0 >> the transaction is |
281719d2 |
645 | considered nested, and you will still need to call L</txn_commit> to write your |
f9f06ae0 |
646 | changes when appropriate. You will also want to connect with C<< auto_savepoint => |
647 | 1 >> to get partial rollback to work, if the storage driver for your database |
281719d2 |
648 | supports it. |
649 | |
f9f06ae0 |
650 | Connecting with C<< AutoCommit => 1 >> is recommended. |
281719d2 |
651 | |
4012acd8 |
652 | =cut |
08b515f1 |
653 | |
4012acd8 |
654 | sub txn_do { |
655 | my $self = shift; |
08b515f1 |
656 | |
4012acd8 |
657 | $self->storage or $self->throw_exception |
658 | ('txn_do called on $schema without storage'); |
08b515f1 |
659 | |
4012acd8 |
660 | $self->storage->txn_do(@_); |
661 | } |
66d9ef6b |
662 | |
6936e902 |
663 | =head2 txn_scope_guard |
75c8a7ab |
664 | |
fd323bf1 |
665 | Runs C<txn_scope_guard> on the schema's storage. See |
89028f42 |
666 | L<DBIx::Class::Storage/txn_scope_guard>. |
75c8a7ab |
667 | |
b85be4c1 |
668 | =cut |
669 | |
1bc193ac |
670 | sub txn_scope_guard { |
671 | my $self = shift; |
672 | |
673 | $self->storage or $self->throw_exception |
674 | ('txn_scope_guard called on $schema without storage'); |
675 | |
676 | $self->storage->txn_scope_guard(@_); |
677 | } |
678 | |
4012acd8 |
679 | =head2 txn_begin |
a62cf8d4 |
680 | |
4012acd8 |
681 | Begins a transaction (does nothing if AutoCommit is off). Equivalent to |
682 | calling $schema->storage->txn_begin. See |
8bfce9d5 |
683 | L<DBIx::Class::Storage/"txn_begin"> for more information. |
27f01d1f |
684 | |
4012acd8 |
685 | =cut |
82b01c38 |
686 | |
4012acd8 |
687 | sub txn_begin { |
688 | my $self = shift; |
27f01d1f |
689 | |
4012acd8 |
690 | $self->storage or $self->throw_exception |
691 | ('txn_begin called on $schema without storage'); |
a62cf8d4 |
692 | |
4012acd8 |
693 | $self->storage->txn_begin; |
694 | } |
a62cf8d4 |
695 | |
4012acd8 |
696 | =head2 txn_commit |
a62cf8d4 |
697 | |
4012acd8 |
698 | Commits the current transaction. Equivalent to calling |
8bfce9d5 |
699 | $schema->storage->txn_commit. See L<DBIx::Class::Storage/"txn_commit"> |
4012acd8 |
700 | for more information. |
a62cf8d4 |
701 | |
4012acd8 |
702 | =cut |
a62cf8d4 |
703 | |
4012acd8 |
704 | sub txn_commit { |
705 | my $self = shift; |
a62cf8d4 |
706 | |
4012acd8 |
707 | $self->storage or $self->throw_exception |
708 | ('txn_commit called on $schema without storage'); |
a62cf8d4 |
709 | |
4012acd8 |
710 | $self->storage->txn_commit; |
711 | } |
70634260 |
712 | |
4012acd8 |
713 | =head2 txn_rollback |
a62cf8d4 |
714 | |
4012acd8 |
715 | Rolls back the current transaction. Equivalent to calling |
716 | $schema->storage->txn_rollback. See |
8bfce9d5 |
717 | L<DBIx::Class::Storage/"txn_rollback"> for more information. |
a62cf8d4 |
718 | |
719 | =cut |
720 | |
4012acd8 |
721 | sub txn_rollback { |
722 | my $self = shift; |
a62cf8d4 |
723 | |
19630353 |
724 | $self->storage or $self->throw_exception |
4012acd8 |
725 | ('txn_rollback called on $schema without storage'); |
a62cf8d4 |
726 | |
4012acd8 |
727 | $self->storage->txn_rollback; |
a62cf8d4 |
728 | } |
729 | |
829517d4 |
730 | =head2 storage |
66d9ef6b |
731 | |
829517d4 |
732 | my $storage = $schema->storage; |
04786a4c |
733 | |
829517d4 |
734 | Returns the L<DBIx::Class::Storage> object for this Schema. Grab this |
735 | if you want to turn on SQL statement debugging at runtime, or set the |
736 | quote character. For the default storage, the documentation can be |
737 | found in L<DBIx::Class::Storage::DBI>. |
66d9ef6b |
738 | |
87c4e602 |
739 | =head2 populate |
740 | |
27f01d1f |
741 | =over 4 |
742 | |
16c5f7d3 |
743 | =item Arguments: $source_name, \@data; |
27f01d1f |
744 | |
829517d4 |
745 | =item Return value: \@$objects | nothing |
746 | |
27f01d1f |
747 | =back |
a37a4697 |
748 | |
16c5f7d3 |
749 | Pass this method a resultsource name, and an arrayref of |
750 | arrayrefs. The arrayrefs should contain a list of column names, |
fd323bf1 |
751 | followed by one or many sets of matching data for the given columns. |
16c5f7d3 |
752 | |
744076d8 |
753 | In void context, C<insert_bulk> in L<DBIx::Class::Storage::DBI> is used |
754 | to insert the data, as this is a fast method. However, insert_bulk currently |
755 | assumes that your datasets all contain the same type of values, using scalar |
756 | references in a column in one row, and not in another will probably not work. |
757 | |
758 | Otherwise, each set of data is inserted into the database using |
16c5f7d3 |
759 | L<DBIx::Class::ResultSet/create>, and a arrayref of the resulting row |
760 | objects is returned. |
82b01c38 |
761 | |
48580715 |
762 | e.g. |
a37a4697 |
763 | |
24d67825 |
764 | $schema->populate('Artist', [ |
765 | [ qw/artistid name/ ], |
766 | [ 1, 'Popular Band' ], |
767 | [ 2, 'Indie Band' ], |
a62cf8d4 |
768 | ... |
769 | ]); |
d4daee7b |
770 | |
fd323bf1 |
771 | Since wantarray context is basically the same as looping over $rs->create(...) |
5a93e138 |
772 | you won't see any performance benefits and in this case the method is more for |
773 | convenience. Void context sends the column information directly to storage |
fd323bf1 |
774 | using <DBI>s bulk insert method. So the performance will be much better for |
5a93e138 |
775 | storages that support this method. |
776 | |
fd323bf1 |
777 | Because of this difference in the way void context inserts rows into your |
5a93e138 |
778 | database you need to note how this will effect any loaded components that |
fd323bf1 |
779 | override or augment insert. For example if you are using a component such |
780 | as L<DBIx::Class::UUIDColumns> to populate your primary keys you MUST use |
5a93e138 |
781 | wantarray context if you want the PKs automatically created. |
a37a4697 |
782 | |
783 | =cut |
784 | |
785 | sub populate { |
786 | my ($self, $name, $data) = @_; |
c4e67d31 |
787 | if(my $rs = $self->resultset($name)) { |
788 | if(defined wantarray) { |
789 | return $rs->populate($data); |
790 | } else { |
791 | $rs->populate($data); |
54e0bd06 |
792 | } |
c4e67d31 |
793 | } else { |
fd323bf1 |
794 | $self->throw_exception("$name is not a resultset"); |
8b93a938 |
795 | } |
a37a4697 |
796 | } |
797 | |
829517d4 |
798 | =head2 connection |
799 | |
800 | =over 4 |
801 | |
802 | =item Arguments: @args |
803 | |
804 | =item Return Value: $new_schema |
805 | |
806 | =back |
807 | |
808 | Similar to L</connect> except sets the storage object and connection |
809 | data in-place on the Schema class. You should probably be calling |
810 | L</connect> to get a proper Schema object instead. |
811 | |
4c7d99ca |
812 | =head3 Overloading |
813 | |
814 | Overload C<connection> to change the behaviour of C<connect>. |
829517d4 |
815 | |
816 | =cut |
817 | |
818 | sub connection { |
819 | my ($self, @info) = @_; |
820 | return $self if !@info && $self->storage; |
d4daee7b |
821 | |
fd323bf1 |
822 | my ($storage_class, $args) = ref $self->storage_type ? |
829517d4 |
823 | ($self->_normalize_storage_type($self->storage_type),{}) : ($self->storage_type, {}); |
d4daee7b |
824 | |
829517d4 |
825 | $storage_class = 'DBIx::Class::Storage'.$storage_class |
826 | if $storage_class =~ m/^::/; |
9780718f |
827 | try { |
828 | $self->ensure_class_loaded ($storage_class); |
829 | } |
830 | catch { |
831 | $self->throw_exception( |
dee99c24 |
832 | "Unable to load storage class ${storage_class}: $_" |
9780718f |
833 | ); |
834 | }; |
829517d4 |
835 | my $storage = $storage_class->new($self=>$args); |
836 | $storage->connect_info(\@info); |
837 | $self->storage($storage); |
838 | return $self; |
839 | } |
840 | |
841 | sub _normalize_storage_type { |
842 | my ($self, $storage_type) = @_; |
843 | if(ref $storage_type eq 'ARRAY') { |
844 | return @$storage_type; |
845 | } elsif(ref $storage_type eq 'HASH') { |
846 | return %$storage_type; |
847 | } else { |
848 | $self->throw_exception('Unsupported REFTYPE given: '. ref $storage_type); |
849 | } |
850 | } |
851 | |
852 | =head2 compose_namespace |
82cc0386 |
853 | |
854 | =over 4 |
855 | |
829517d4 |
856 | =item Arguments: $target_namespace, $additional_base_class? |
857 | |
858 | =item Retur Value: $new_schema |
859 | |
860 | =back |
861 | |
862 | For each L<DBIx::Class::ResultSource> in the schema, this method creates a |
863 | class in the target namespace (e.g. $target_namespace::CD, |
864 | $target_namespace::Artist) that inherits from the corresponding classes |
865 | attached to the current schema. |
866 | |
867 | It also attaches a corresponding L<DBIx::Class::ResultSource> object to the |
868 | new $schema object. If C<$additional_base_class> is given, the new composed |
48580715 |
869 | classes will inherit from first the corresponding class from the current |
829517d4 |
870 | schema then the base class. |
871 | |
872 | For example, for a schema with My::Schema::CD and My::Schema::Artist classes, |
873 | |
874 | $schema->compose_namespace('My::DB', 'Base::Class'); |
875 | print join (', ', @My::DB::CD::ISA) . "\n"; |
876 | print join (', ', @My::DB::Artist::ISA) ."\n"; |
877 | |
878 | will produce the output |
879 | |
880 | My::Schema::CD, Base::Class |
881 | My::Schema::Artist, Base::Class |
882 | |
883 | =cut |
884 | |
885 | # this might be oversimplified |
886 | # sub compose_namespace { |
887 | # my ($self, $target, $base) = @_; |
888 | |
889 | # my $schema = $self->clone; |
890 | # foreach my $moniker ($schema->sources) { |
891 | # my $source = $schema->source($moniker); |
892 | # my $target_class = "${target}::${moniker}"; |
893 | # $self->inject_base( |
894 | # $target_class => $source->result_class, ($base ? $base : ()) |
895 | # ); |
896 | # $source->result_class($target_class); |
897 | # $target_class->result_source_instance($source) |
898 | # if $target_class->can('result_source_instance'); |
899 | # $schema->register_source($moniker, $source); |
900 | # } |
901 | # return $schema; |
902 | # } |
903 | |
904 | sub compose_namespace { |
905 | my ($self, $target, $base) = @_; |
dee99c24 |
906 | |
829517d4 |
907 | my $schema = $self->clone; |
dee99c24 |
908 | |
909 | $schema->source_registrations({}); |
910 | |
911 | # the original class-mappings must remain - otherwise |
912 | # reverse_relationship_info will not work |
913 | #$schema->class_mappings({}); |
914 | |
829517d4 |
915 | { |
916 | no warnings qw/redefine/; |
87bf71d5 |
917 | local *Class::C3::reinitialize = sub { } if DBIx::Class::_ENV_::OLD_MRO; |
918 | use warnings qw/redefine/; |
919 | |
a8c2c746 |
920 | no strict qw/refs/; |
dee99c24 |
921 | foreach my $moniker ($self->sources) { |
922 | my $orig_source = $self->source($moniker); |
923 | |
829517d4 |
924 | my $target_class = "${target}::${moniker}"; |
dee99c24 |
925 | $self->inject_base($target_class, $orig_source->result_class, ($base || ()) ); |
926 | |
927 | # register_source examines result_class, and then returns us a clone |
928 | my $new_source = $schema->register_source($moniker, bless |
929 | { %$orig_source, result_class => $target_class }, |
930 | ref $orig_source, |
829517d4 |
931 | ); |
a8c2c746 |
932 | |
dee99c24 |
933 | if ($target_class->can('result_source_instance')) { |
934 | # give the class a schema-less source copy |
935 | $target_class->result_source_instance( bless |
936 | { %$new_source, schema => ref $new_source->{schema} || $new_source->{schema} }, |
937 | ref $new_source, |
938 | ); |
a8c2c746 |
939 | } |
829517d4 |
940 | } |
dee99c24 |
941 | |
829517d4 |
942 | foreach my $meth (qw/class source resultset/) { |
dee99c24 |
943 | no warnings 'redefine'; |
6298a324 |
944 | *{"${target}::${meth}"} = subname "${target}::${meth}" => |
829517d4 |
945 | sub { shift->schema->$meth(@_) }; |
946 | } |
947 | } |
dee99c24 |
948 | |
949 | Class::C3->reinitialize() if DBIx::Class::_ENV_::OLD_MRO; |
950 | |
829517d4 |
951 | return $schema; |
952 | } |
953 | |
954 | sub setup_connection_class { |
955 | my ($class, $target, @info) = @_; |
956 | $class->inject_base($target => 'DBIx::Class::DB'); |
957 | #$target->load_components('DB'); |
958 | $target->connection(@info); |
959 | } |
960 | |
961 | =head2 svp_begin |
962 | |
fd323bf1 |
963 | Creates a new savepoint (does nothing outside a transaction). |
829517d4 |
964 | Equivalent to calling $schema->storage->svp_begin. See |
8bfce9d5 |
965 | L<DBIx::Class::Storage/"svp_begin"> for more information. |
829517d4 |
966 | |
967 | =cut |
968 | |
969 | sub svp_begin { |
970 | my ($self, $name) = @_; |
971 | |
972 | $self->storage or $self->throw_exception |
973 | ('svp_begin called on $schema without storage'); |
974 | |
975 | $self->storage->svp_begin($name); |
976 | } |
977 | |
978 | =head2 svp_release |
979 | |
fd323bf1 |
980 | Releases a savepoint (does nothing outside a transaction). |
829517d4 |
981 | Equivalent to calling $schema->storage->svp_release. See |
8bfce9d5 |
982 | L<DBIx::Class::Storage/"svp_release"> for more information. |
829517d4 |
983 | |
984 | =cut |
985 | |
986 | sub svp_release { |
987 | my ($self, $name) = @_; |
988 | |
989 | $self->storage or $self->throw_exception |
990 | ('svp_release called on $schema without storage'); |
82cc0386 |
991 | |
829517d4 |
992 | $self->storage->svp_release($name); |
993 | } |
82cc0386 |
994 | |
829517d4 |
995 | =head2 svp_rollback |
db5dc233 |
996 | |
fd323bf1 |
997 | Rollback to a savepoint (does nothing outside a transaction). |
829517d4 |
998 | Equivalent to calling $schema->storage->svp_rollback. See |
8bfce9d5 |
999 | L<DBIx::Class::Storage/"svp_rollback"> for more information. |
82cc0386 |
1000 | |
829517d4 |
1001 | =cut |
82cc0386 |
1002 | |
829517d4 |
1003 | sub svp_rollback { |
1004 | my ($self, $name) = @_; |
82cc0386 |
1005 | |
829517d4 |
1006 | $self->storage or $self->throw_exception |
1007 | ('svp_rollback called on $schema without storage'); |
82cc0386 |
1008 | |
829517d4 |
1009 | $self->storage->svp_rollback($name); |
1010 | } |
db5dc233 |
1011 | |
829517d4 |
1012 | =head2 clone |
613397e7 |
1013 | |
84c5863b |
1014 | =over 4 |
613397e7 |
1015 | |
71829446 |
1016 | =item Arguments: %attrs? |
1017 | |
829517d4 |
1018 | =item Return Value: $new_schema |
613397e7 |
1019 | |
1020 | =back |
1021 | |
829517d4 |
1022 | Clones the schema and its associated result_source objects and returns the |
71829446 |
1023 | copy. The resulting copy will have the same attributes as the source schema, |
1024 | except for those attributes explicitly overriden by the provided C<%attrs>. |
829517d4 |
1025 | |
1026 | =cut |
1027 | |
1028 | sub clone { |
71829446 |
1029 | my $self = shift; |
1030 | |
1031 | my $clone = { |
1032 | (ref $self ? %$self : ()), |
1033 | (@_ == 1 && ref $_[0] eq 'HASH' ? %{ $_[0] } : @_), |
1034 | }; |
829517d4 |
1035 | bless $clone, (ref $self || $self); |
1036 | |
1037 | $clone->class_mappings({ %{$clone->class_mappings} }); |
1038 | $clone->source_registrations({ %{$clone->source_registrations} }); |
1039 | foreach my $moniker ($self->sources) { |
1040 | my $source = $self->source($moniker); |
1041 | my $new = $source->new($source); |
1042 | # we use extra here as we want to leave the class_mappings as they are |
1043 | # but overwrite the source_registrations entry with the new source |
1044 | $clone->register_extra_source($moniker => $new); |
1045 | } |
1046 | $clone->storage->set_schema($clone) if $clone->storage; |
dee99c24 |
1047 | |
829517d4 |
1048 | return $clone; |
1049 | } |
613397e7 |
1050 | |
5160b401 |
1051 | =head2 throw_exception |
701da8c4 |
1052 | |
75d07914 |
1053 | =over 4 |
82b01c38 |
1054 | |
ebc77b53 |
1055 | =item Arguments: $message |
82b01c38 |
1056 | |
1057 | =back |
1058 | |
70c28808 |
1059 | Throws an exception. Obeys the exemption rules of L<DBIx::Class::Carp> to report |
1060 | errors from outer-user's perspective. See L</exception_action> for details on overriding |
4b946902 |
1061 | this method's behavior. If L</stacktrace> is turned on, C<throw_exception>'s |
1062 | default behavior will provide a detailed stack trace. |
701da8c4 |
1063 | |
1064 | =cut |
1065 | |
c3e9f718 |
1066 | my $false_exception_action_warned; |
701da8c4 |
1067 | sub throw_exception { |
82cc0386 |
1068 | my $self = shift; |
4981dc70 |
1069 | |
c3e9f718 |
1070 | if (my $act = $self->exception_action) { |
1071 | if ($act->(@_)) { |
1072 | DBIx::Class::Exception->throw( |
1073 | "Invocation of the exception_action handler installed on $self did *not*" |
1074 | .' result in an exception. DBIx::Class is unable to function without a reliable' |
1075 | .' exception mechanism, ensure that exception_action does not hide exceptions' |
1076 | ." (original error: $_[0])" |
1077 | ); |
1078 | } |
1079 | elsif(! $false_exception_action_warned++) { |
1080 | carp ( |
1081 | "The exception_action handler installed on $self returned false instead" |
1082 | .' of throwing an exception. This behavior has been deprecated, adjust your' |
1083 | .' handler to always rethrow the supplied error.' |
1084 | ); |
1085 | } |
1086 | } |
1087 | |
1088 | DBIx::Class::Exception->throw($_[0], $self->stacktrace); |
701da8c4 |
1089 | } |
1090 | |
dfccde48 |
1091 | =head2 deploy |
1c339d71 |
1092 | |
82b01c38 |
1093 | =over 4 |
1094 | |
10976519 |
1095 | =item Arguments: \%sqlt_args, $dir |
82b01c38 |
1096 | |
1097 | =back |
1098 | |
1099 | Attempts to deploy the schema to the current storage using L<SQL::Translator>. |
ec6704d4 |
1100 | |
10976519 |
1101 | See L<SQL::Translator/METHODS> for a list of values for C<\%sqlt_args>. |
1102 | The most common value for this would be C<< { add_drop_table => 1 } >> |
1103 | to have the SQL produced include a C<DROP TABLE> statement for each table |
1104 | created. For quoting purposes supply C<quote_table_names> and |
3e82fc27 |
1105 | C<quote_field_names>. |
51bace1c |
1106 | |
fd323bf1 |
1107 | Additionally, the DBIx::Class parser accepts a C<sources> parameter as a hash |
1108 | ref or an array ref, containing a list of source to deploy. If present, then |
0e2c6809 |
1109 | only the sources listed will get deployed. Furthermore, you can use the |
1110 | C<add_fk_index> parser parameter to prevent the parser from creating an index for each |
1111 | FK. |
499adf63 |
1112 | |
1c339d71 |
1113 | =cut |
1114 | |
1115 | sub deploy { |
6e73ac25 |
1116 | my ($self, $sqltargs, $dir) = @_; |
1c339d71 |
1117 | $self->throw_exception("Can't deploy without storage") unless $self->storage; |
6e73ac25 |
1118 | $self->storage->deploy($self, undef, $sqltargs, $dir); |
1c339d71 |
1119 | } |
1120 | |
0e0ce6c1 |
1121 | =head2 deployment_statements |
1122 | |
1123 | =over 4 |
1124 | |
10976519 |
1125 | =item Arguments: See L<DBIx::Class::Storage::DBI/deployment_statements> |
0e0ce6c1 |
1126 | |
829517d4 |
1127 | =item Return value: $listofstatements |
1128 | |
0e0ce6c1 |
1129 | =back |
1130 | |
10976519 |
1131 | A convenient shortcut to |
1132 | C<< $self->storage->deployment_statements($self, @args) >>. |
1133 | Returns the SQL statements used by L</deploy> and |
1134 | L<DBIx::Class::Schema::Storage/deploy>. |
0e0ce6c1 |
1135 | |
1136 | =cut |
1137 | |
1138 | sub deployment_statements { |
7ad93f5a |
1139 | my $self = shift; |
0e0ce6c1 |
1140 | |
1141 | $self->throw_exception("Can't generate deployment statements without a storage") |
1142 | if not $self->storage; |
1143 | |
7ad93f5a |
1144 | $self->storage->deployment_statements($self, @_); |
0e0ce6c1 |
1145 | } |
1146 | |
6dfbe2f8 |
1147 | =head2 create_ddl_dir |
c0f61310 |
1148 | |
1149 | =over 4 |
1150 | |
10976519 |
1151 | =item Arguments: See L<DBIx::Class::Storage::DBI/create_ddl_dir> |
c0f61310 |
1152 | |
1153 | =back |
1154 | |
fd323bf1 |
1155 | A convenient shortcut to |
10976519 |
1156 | C<< $self->storage->create_ddl_dir($self, @args) >>. |
c9d2e0a2 |
1157 | |
10976519 |
1158 | Creates an SQL file based on the Schema, for each of the specified |
1159 | database types, in the given directory. |
c9d2e0a2 |
1160 | |
c0f61310 |
1161 | =cut |
1162 | |
6e73ac25 |
1163 | sub create_ddl_dir { |
e673f011 |
1164 | my $self = shift; |
1165 | |
1166 | $self->throw_exception("Can't create_ddl_dir without storage") unless $self->storage; |
1167 | $self->storage->create_ddl_dir($self, @_); |
1168 | } |
1169 | |
e63a82f7 |
1170 | =head2 ddl_filename |
9b83fccd |
1171 | |
c9d2e0a2 |
1172 | =over 4 |
1173 | |
99a74c4a |
1174 | =item Arguments: $database-type, $version, $directory, $preversion |
c9d2e0a2 |
1175 | |
829517d4 |
1176 | =item Return value: $normalised_filename |
1177 | |
c9d2e0a2 |
1178 | =back |
1179 | |
99a74c4a |
1180 | my $filename = $table->ddl_filename($type, $version, $dir, $preversion) |
c9d2e0a2 |
1181 | |
1182 | This method is called by C<create_ddl_dir> to compose a file name out of |
1183 | the supplied directory, database type and version number. The default file |
1184 | name format is: C<$dir$schema-$version-$type.sql>. |
9b83fccd |
1185 | |
c9d2e0a2 |
1186 | You may override this method in your schema if you wish to use a different |
1187 | format. |
9b83fccd |
1188 | |
1acfef8e |
1189 | WARNING |
1190 | |
1191 | Prior to DBIx::Class version 0.08100 this method had a different signature: |
1192 | |
1193 | my $filename = $table->ddl_filename($type, $dir, $version, $preversion) |
1194 | |
1195 | In recent versions variables $dir and $version were reversed in order to |
fd323bf1 |
1196 | bring the signature in line with other Schema/Storage methods. If you |
1acfef8e |
1197 | really need to maintain backward compatibility, you can do the following |
1198 | in any overriding methods: |
1199 | |
1200 | ($dir, $version) = ($version, $dir) if ($DBIx::Class::VERSION < 0.08100); |
1201 | |
9b83fccd |
1202 | =cut |
1203 | |
6e73ac25 |
1204 | sub ddl_filename { |
99a74c4a |
1205 | my ($self, $type, $version, $dir, $preversion) = @_; |
e673f011 |
1206 | |
3b80fa31 |
1207 | require File::Spec; |
1208 | |
99a74c4a |
1209 | my $filename = ref($self); |
1210 | $filename =~ s/::/-/g; |
1211 | $filename = File::Spec->catfile($dir, "$filename-$version-$type.sql"); |
1212 | $filename =~ s/$version/$preversion-$version/ if($preversion); |
d4daee7b |
1213 | |
99a74c4a |
1214 | return $filename; |
e673f011 |
1215 | } |
1216 | |
4146e3da |
1217 | =head2 thaw |
1218 | |
fd323bf1 |
1219 | Provided as the recommended way of thawing schema objects. You can call |
4146e3da |
1220 | C<Storable::thaw> directly if you wish, but the thawed objects will not have a |
48580715 |
1221 | reference to any schema, so are rather useless. |
4146e3da |
1222 | |
1223 | =cut |
1224 | |
1225 | sub thaw { |
1226 | my ($self, $obj) = @_; |
1227 | local $DBIx::Class::ResultSourceHandle::thaw_schema = $self; |
3b80fa31 |
1228 | require Storable; |
4146e3da |
1229 | return Storable::thaw($obj); |
1230 | } |
1231 | |
1232 | =head2 freeze |
1233 | |
26148d36 |
1234 | This doesn't actually do anything more than call L<Storable/nfreeze>, it is just |
48580715 |
1235 | provided here for symmetry. |
4146e3da |
1236 | |
d2f3e87b |
1237 | =cut |
1238 | |
4146e3da |
1239 | sub freeze { |
3b80fa31 |
1240 | require Storable; |
26148d36 |
1241 | return Storable::nfreeze($_[1]); |
4146e3da |
1242 | } |
1243 | |
1244 | =head2 dclone |
1245 | |
1477a478 |
1246 | =over 4 |
1247 | |
1248 | =item Arguments: $object |
1249 | |
1250 | =item Return Value: dcloned $object |
1251 | |
1252 | =back |
1253 | |
9e9ecfda |
1254 | Recommended way of dcloning L<DBIx::Class::Row> and L<DBIx::Class::ResultSet> |
1255 | objects so their references to the schema object |
1256 | (which itself is B<not> cloned) are properly maintained. |
4146e3da |
1257 | |
1258 | =cut |
1259 | |
1260 | sub dclone { |
1261 | my ($self, $obj) = @_; |
1262 | local $DBIx::Class::ResultSourceHandle::thaw_schema = $self; |
3b80fa31 |
1263 | require Storable; |
4146e3da |
1264 | return Storable::dclone($obj); |
1265 | } |
1266 | |
93e4d41a |
1267 | =head2 schema_version |
1268 | |
829517d4 |
1269 | Returns the current schema class' $VERSION in a normalised way. |
93e4d41a |
1270 | |
1271 | =cut |
1272 | |
1273 | sub schema_version { |
1274 | my ($self) = @_; |
1275 | my $class = ref($self)||$self; |
1276 | |
1277 | # does -not- use $schema->VERSION |
1278 | # since that varies in results depending on if version.pm is installed, and if |
1279 | # so the perl or XS versions. If you want this to change, bug the version.pm |
1280 | # author to make vpp and vxs behave the same. |
1281 | |
1282 | my $version; |
1283 | { |
1284 | no strict 'refs'; |
1285 | $version = ${"${class}::VERSION"}; |
1286 | } |
1287 | return $version; |
1288 | } |
1289 | |
829517d4 |
1290 | |
1291 | =head2 register_class |
1292 | |
1293 | =over 4 |
1294 | |
1295 | =item Arguments: $moniker, $component_class |
1296 | |
1297 | =back |
1298 | |
fd323bf1 |
1299 | This method is called by L</load_namespaces> and L</load_classes> to install the found classes into your Schema. You should be using those instead of this one. |
829517d4 |
1300 | |
1301 | You will only need this method if you have your Result classes in |
1302 | files which are not named after the packages (or all in the same |
1303 | file). You may also need it to register classes at runtime. |
1304 | |
1305 | Registers a class which isa DBIx::Class::ResultSourceProxy. Equivalent to |
1306 | calling: |
1307 | |
1308 | $schema->register_source($moniker, $component_class->result_source_instance); |
1309 | |
1310 | =cut |
1311 | |
1312 | sub register_class { |
1313 | my ($self, $moniker, $to_register) = @_; |
1e36ef62 |
1314 | $self->register_source($moniker => $to_register->result_source_instance); |
829517d4 |
1315 | } |
1316 | |
1317 | =head2 register_source |
1318 | |
1319 | =over 4 |
1320 | |
1321 | =item Arguments: $moniker, $result_source |
1322 | |
1323 | =back |
1324 | |
1325 | This method is called by L</register_class>. |
1326 | |
1327 | Registers the L<DBIx::Class::ResultSource> in the schema with the given |
1328 | moniker. |
1329 | |
1330 | =cut |
1331 | |
dee99c24 |
1332 | sub register_source { shift->_register_source(@_) } |
829517d4 |
1333 | |
98cabed3 |
1334 | =head2 unregister_source |
1335 | |
1336 | =over 4 |
1337 | |
1338 | =item Arguments: $moniker |
1339 | |
1340 | =back |
1341 | |
1342 | Removes the L<DBIx::Class::ResultSource> from the schema for the given moniker. |
1343 | |
1344 | =cut |
1345 | |
dee99c24 |
1346 | sub unregister_source { shift->_unregister_source(@_) } |
98cabed3 |
1347 | |
829517d4 |
1348 | =head2 register_extra_source |
1349 | |
1350 | =over 4 |
1351 | |
1352 | =item Arguments: $moniker, $result_source |
1353 | |
1354 | =back |
1355 | |
fd323bf1 |
1356 | As L</register_source> but should be used if the result class already |
829517d4 |
1357 | has a source and you want to register an extra one. |
1358 | |
1359 | =cut |
1360 | |
dee99c24 |
1361 | sub register_extra_source { shift->_register_source(@_, { extra => 1 }) } |
829517d4 |
1362 | |
1363 | sub _register_source { |
1364 | my ($self, $moniker, $source, $params) = @_; |
1365 | |
0e6c5d58 |
1366 | $source = $source->new({ %$source, source_name => $moniker }); |
dee99c24 |
1367 | |
2461ae19 |
1368 | $source->schema($self); |
6298a324 |
1369 | weaken $source->{schema} if ref($self); |
2461ae19 |
1370 | |
829517d4 |
1371 | my %reg = %{$self->source_registrations}; |
1372 | $reg{$moniker} = $source; |
1373 | $self->source_registrations(\%reg); |
1374 | |
dee99c24 |
1375 | return $source if $params->{extra}; |
1376 | |
1377 | my $rs_class = $source->result_class; |
1378 | if ($rs_class and my $rsrc = try { $rs_class->result_source_instance } ) { |
1379 | my %map = %{$self->class_mappings}; |
1380 | if ( |
1381 | exists $map{$rs_class} |
1382 | and |
1383 | $map{$rs_class} ne $moniker |
1384 | and |
1385 | $rsrc ne $_[2] # orig_source |
1386 | ) { |
1387 | carp |
1388 | "$rs_class already had a registered source which was replaced by this call. " |
1389 | . 'Perhaps you wanted register_extra_source(), though it is more likely you did ' |
1390 | . 'something wrong.' |
1391 | ; |
1392 | } |
1393 | |
1394 | $map{$rs_class} = $moniker; |
1395 | $self->class_mappings(\%map); |
829517d4 |
1396 | } |
dee99c24 |
1397 | |
1398 | return $source; |
829517d4 |
1399 | } |
1400 | |
50261284 |
1401 | { |
1402 | my $global_phase_destroy; |
1403 | |
66917da3 |
1404 | # SpeedyCGI runs END blocks every cycle but keeps object instances |
1405 | # hence we have to disable the globaldestroy hatch, and rely on the |
1406 | # eval trap below (which appears to work, but is risky done so late) |
1407 | END { $global_phase_destroy = 1 unless $CGI::SpeedyCGI::i_am_speedy } |
50261284 |
1408 | |
1409 | sub DESTROY { |
1410 | return if $global_phase_destroy; |
1411 | |
1412 | my $self = shift; |
1413 | my $srcs = $self->source_registrations; |
1414 | |
1415 | for my $moniker (keys %$srcs) { |
1416 | # find first source that is not about to be GCed (someone other than $self |
1417 | # holds a reference to it) and reattach to it, weakening our own link |
66917da3 |
1418 | # |
1419 | # during global destruction (if we have not yet bailed out) this will throw |
1420 | # which will serve as a signal to not try doing anything else |
50261284 |
1421 | if (ref $srcs->{$moniker} and svref_2object($srcs->{$moniker})->REFCNT > 1) { |
66917da3 |
1422 | local $@; |
1423 | eval { |
1424 | $srcs->{$moniker}->schema($self); |
1425 | 1; |
1426 | } or do { |
1427 | $global_phase_destroy = 1; |
1428 | last; |
1429 | }; |
1430 | |
50261284 |
1431 | weaken $srcs->{$moniker}; |
1432 | last; |
1433 | } |
1434 | } |
1435 | } |
1436 | } |
1437 | |
829517d4 |
1438 | sub _unregister_source { |
1439 | my ($self, $moniker) = @_; |
fd323bf1 |
1440 | my %reg = %{$self->source_registrations}; |
829517d4 |
1441 | |
1442 | my $source = delete $reg{$moniker}; |
1443 | $self->source_registrations(\%reg); |
1444 | if ($source->result_class) { |
1445 | my %map = %{$self->class_mappings}; |
1446 | delete $map{$source->result_class}; |
1447 | $self->class_mappings(\%map); |
1448 | } |
1449 | } |
1450 | |
1451 | |
1452 | =head2 compose_connection (DEPRECATED) |
1453 | |
1454 | =over 4 |
1455 | |
1456 | =item Arguments: $target_namespace, @db_info |
1457 | |
1458 | =item Return Value: $new_schema |
1459 | |
1460 | =back |
1461 | |
1462 | DEPRECATED. You probably wanted compose_namespace. |
1463 | |
1464 | Actually, you probably just wanted to call connect. |
1465 | |
1466 | =begin hidden |
1467 | |
1468 | (hidden due to deprecation) |
1469 | |
1470 | Calls L<DBIx::Class::Schema/"compose_namespace"> to the target namespace, |
1471 | calls L<DBIx::Class::Schema/connection> with @db_info on the new schema, |
1472 | then injects the L<DBix::Class::ResultSetProxy> component and a |
1473 | resultset_instance classdata entry on all the new classes, in order to support |
1474 | $target_namespaces::$class->search(...) method calls. |
1475 | |
1476 | This is primarily useful when you have a specific need for class method access |
1477 | to a connection. In normal usage it is preferred to call |
1478 | L<DBIx::Class::Schema/connect> and use the resulting schema object to operate |
1479 | on L<DBIx::Class::ResultSet> objects with L<DBIx::Class::Schema/resultset> for |
1480 | more information. |
1481 | |
1482 | =end hidden |
1483 | |
1484 | =cut |
1485 | |
e42bbd7f |
1486 | sub compose_connection { |
1487 | my ($self, $target, @info) = @_; |
829517d4 |
1488 | |
e42bbd7f |
1489 | carp_once "compose_connection deprecated as of 0.08000" |
1490 | unless $INC{"DBIx/Class/CDBICompat.pm"}; |
d4daee7b |
1491 | |
e42bbd7f |
1492 | my $base = 'DBIx::Class::ResultSetProxy'; |
1493 | try { |
1494 | eval "require ${base};" |
1495 | } |
1496 | catch { |
1497 | $self->throw_exception |
1498 | ("No arguments to load_classes and couldn't load ${base} ($_)") |
1499 | }; |
d4daee7b |
1500 | |
e42bbd7f |
1501 | if ($self eq $target) { |
1502 | # Pathological case, largely caused by the docs on early C::M::DBIC::Plain |
1503 | foreach my $moniker ($self->sources) { |
1504 | my $source = $self->source($moniker); |
829517d4 |
1505 | my $class = $source->result_class; |
e42bbd7f |
1506 | $self->inject_base($class, $base); |
829517d4 |
1507 | $class->mk_classdata(resultset_instance => $source->resultset); |
e42bbd7f |
1508 | $class->mk_classdata(class_resolver => $self); |
829517d4 |
1509 | } |
e42bbd7f |
1510 | $self->connection(@info); |
1511 | return $self; |
1512 | } |
1513 | |
1514 | my $schema = $self->compose_namespace($target, $base); |
1515 | { |
1516 | no strict 'refs'; |
1517 | my $name = join '::', $target, 'schema'; |
1518 | *$name = subname $name, sub { $schema }; |
829517d4 |
1519 | } |
e42bbd7f |
1520 | |
1521 | $schema->connection(@info); |
1522 | foreach my $moniker ($schema->sources) { |
1523 | my $source = $schema->source($moniker); |
1524 | my $class = $source->result_class; |
1525 | #warn "$moniker $class $source ".$source->storage; |
1526 | $class->mk_classdata(result_source_instance => $source); |
1527 | $class->mk_classdata(resultset_instance => $source->resultset); |
1528 | $class->mk_classdata(class_resolver => $schema); |
1529 | } |
1530 | return $schema; |
829517d4 |
1531 | } |
1532 | |
a02675cd |
1533 | 1; |
c2da098a |
1534 | |
c2da098a |
1535 | =head1 AUTHORS |
1536 | |
daec44b8 |
1537 | Matt S. Trout <mst@shadowcatsystems.co.uk> |
c2da098a |
1538 | |
1539 | =head1 LICENSE |
1540 | |
1541 | You may distribute this code under the same terms as Perl itself. |
1542 | |
1543 | =cut |