Commit | Line | Data |
18fca96a |
1 | package DBIx::Class::Schema::Loader::Generic; |
a78e3fed |
2 | |
3 | use strict; |
a4a19f3c |
4 | use warnings; |
457eb8a6 |
5 | use base qw/Class::Accessor::Fast/; |
2a4b8262 |
6 | use Class::C3; |
a78e3fed |
7 | use Carp; |
8 | use Lingua::EN::Inflect; |
8563178e |
9 | use UNIVERSAL::require; |
f3be6194 |
10 | require DBIx::Class; |
a4a19f3c |
11 | |
3980d69c |
12 | # The first group are all arguments which are may be defaulted within, |
13 | # The last two (classes, monikers) are generated locally: |
14 | |
15 | __PACKAGE__->mk_ro_accessors(qw/ |
16 | schema |
17 | dsn |
18 | user |
19 | password |
20 | options |
21 | exclude |
22 | constraint |
23 | additional_classes |
24 | additional_base_classes |
25 | left_base_classes |
9fa99683 |
26 | components |
27 | resultset_components |
3980d69c |
28 | relationships |
4350370d |
29 | inflect_map |
30 | moniker_map |
3980d69c |
31 | db_schema |
32 | drop_db_schema |
33 | debug |
34 | |
35 | classes |
36 | monikers |
37 | /); |
a4a19f3c |
38 | |
a78e3fed |
39 | =head1 NAME |
40 | |
18fca96a |
41 | DBIx::Class::Schema::Loader::Generic - Generic DBIx::Class::Schema::Loader Implementation. |
a78e3fed |
42 | |
43 | =head1 SYNOPSIS |
44 | |
18fca96a |
45 | See L<DBIx::Class::Schema::Loader> |
a78e3fed |
46 | |
47 | =head1 DESCRIPTION |
48 | |
457eb8a6 |
49 | This is the base class for the vendor-specific C<DBIx::Class::Schema::*> |
50 | classes, and implements the common functionality between them. |
51 | |
52 | =head1 OPTIONS |
a78e3fed |
53 | |
54 | Available constructor options are: |
55 | |
457eb8a6 |
56 | =head2 additional_base_classes |
a78e3fed |
57 | |
58 | List of additional base classes your table classes will use. |
59 | |
457eb8a6 |
60 | =head2 left_base_classes |
a78e3fed |
61 | |
62 | List of additional base classes, that need to be leftmost. |
63 | |
457eb8a6 |
64 | =head2 additional_classes |
a78e3fed |
65 | |
66 | List of additional classes which your table classes will use. |
67 | |
c2849787 |
68 | =head2 components |
69 | |
70 | List of additional components to be loaded into your table classes. |
71 | A good example would be C<ResultSetManager>. |
72 | |
73 | =head2 resultset_components |
74 | |
75 | List of additional resultset components to be loaded into your table |
76 | classes. A good example would be C<AlwaysRS>. Component |
77 | C<ResultSetManager> will be automatically added to the above |
78 | C<components> list if this option is set. |
79 | |
457eb8a6 |
80 | =head2 constraint |
a78e3fed |
81 | |
82 | Only load tables matching regex. |
83 | |
457eb8a6 |
84 | =head2 exclude |
a78e3fed |
85 | |
86 | Exclude tables matching regex. |
87 | |
457eb8a6 |
88 | =head2 debug |
a78e3fed |
89 | |
90 | Enable debug messages. |
91 | |
457eb8a6 |
92 | =head2 dsn |
a78e3fed |
93 | |
94 | DBI Data Source Name. |
95 | |
457eb8a6 |
96 | =head2 password |
a78e3fed |
97 | |
98 | Password. |
99 | |
457eb8a6 |
100 | =head2 relationships |
a78e3fed |
101 | |
102 | Try to automatically detect/setup has_a and has_many relationships. |
103 | |
4350370d |
104 | =head2 moniker_map |
105 | |
106 | Overrides the default tablename -> moniker translation. Can be either |
107 | a hashref of table => moniker names, or a coderef for a translator |
108 | function taking a single scalar table name argument and returning |
109 | a scalar moniker. If the hash entry does not exist, or the function |
110 | returns a false/undef value, the code falls back to default behavior |
111 | for that table name. |
112 | |
113 | =head2 inflect_map |
114 | |
115 | Just like L</moniker_map> above, but for inflecting (pluralizing) |
116 | relationship names. |
117 | |
457eb8a6 |
118 | =head2 inflect |
a78e3fed |
119 | |
4350370d |
120 | Deprecated. Equivalent to L</inflect_map>, but previously only took |
121 | a hashref argument, not a coderef. If you set C<inflect> to anything, |
122 | that setting will be copied to L</inflect_map>. |
a78e3fed |
123 | |
457eb8a6 |
124 | =head2 user |
a78e3fed |
125 | |
126 | Username. |
127 | |
457eb8a6 |
128 | =head1 METHODS |
2a4b8262 |
129 | |
a78e3fed |
130 | =cut |
131 | |
3980d69c |
132 | # ensure that a peice of object data is a valid arrayref, creating |
133 | # an empty one or encapsulating whatever's there. |
134 | sub _ensure_arrayref { |
135 | my $self = shift; |
e26a4023 |
136 | |
3980d69c |
137 | foreach (@_) { |
138 | $self->{$_} ||= []; |
139 | $self->{$_} = [ $self->{$_} ] |
140 | unless ref $self->{$_} eq 'ARRAY'; |
141 | } |
a78e3fed |
142 | } |
143 | |
457eb8a6 |
144 | =head2 new |
145 | |
146 | Constructor for L<DBIx::Class::Schema::Loader::Generic>, used internally |
147 | by L<DBIx::Class::Schema::Loader>. |
148 | |
149 | =cut |
150 | |
3980d69c |
151 | sub new { |
152 | my ( $class, %args ) = @_; |
a78e3fed |
153 | |
3980d69c |
154 | my $self = { %args }; |
fbd83464 |
155 | |
3980d69c |
156 | bless $self => $class; |
fbd83464 |
157 | |
3980d69c |
158 | $self->{db_schema} ||= ''; |
159 | $self->{constraint} ||= '.*'; |
3980d69c |
160 | $self->_ensure_arrayref(qw/additional_classes |
161 | additional_base_classes |
c2849787 |
162 | left_base_classes |
9fa99683 |
163 | components |
164 | resultset_components/); |
c2849787 |
165 | |
166 | push(@{$self->{components}}, 'ResultSetManager') |
167 | if @{$self->{resultset_components}}; |
fbd83464 |
168 | |
3980d69c |
169 | $self->{monikers} = {}; |
170 | $self->{classes} = {}; |
a78e3fed |
171 | |
4350370d |
172 | # Support deprecated argument name |
173 | $self->{inflect_map} ||= $self->{inflect}; |
174 | |
2a4b8262 |
175 | $self; |
176 | } |
177 | |
457eb8a6 |
178 | =head2 load |
179 | |
180 | Does the actual schema-construction work, used internally by |
181 | L<DBIx::Class::Schema::Loader> right after object construction. |
182 | |
183 | =cut |
184 | |
2a4b8262 |
185 | sub load { |
186 | my $self = shift; |
187 | |
3980d69c |
188 | $self->schema->connection($self->dsn, $self->user, |
189 | $self->password, $self->options); |
a78e3fed |
190 | |
3980d69c |
191 | warn qq/\### START DBIx::Class::Schema::Loader dump ###\n/ |
192 | if $self->debug; |
a78e3fed |
193 | |
3980d69c |
194 | $self->_load_classes; |
195 | $self->_load_relationships if $self->relationships; |
a78e3fed |
196 | |
3980d69c |
197 | warn qq/\### END DBIx::Class::Schema::Loader dump ###\n/ |
198 | if $self->debug; |
52bf3f26 |
199 | $self->schema->storage->disconnect; |
a78e3fed |
200 | |
3980d69c |
201 | $self; |
a78e3fed |
202 | } |
203 | |
204 | # Overload in your driver class |
3980d69c |
205 | sub _db_classes { croak "ABSTRACT METHOD" } |
66742793 |
206 | |
16f6b6ac |
207 | # Inflect a relationship name |
3980d69c |
208 | sub _inflect_relname { |
209 | my ($self, $relname) = @_; |
708c0939 |
210 | |
4350370d |
211 | if( ref $self->{inflect_map} eq 'HASH' ) { |
212 | return $self->inflect_map->{$relname} |
213 | if exists $self->inflect_map->{$relname}; |
214 | } |
215 | elsif( ref $self->{inflect_map} eq 'CODE' ) { |
216 | my $inflected = $self->inflect_map->($relname); |
217 | return $inflected if $inflected; |
218 | } |
219 | |
3980d69c |
220 | return Lingua::EN::Inflect::PL($relname); |
16f6b6ac |
221 | } |
a78e3fed |
222 | |
16f6b6ac |
223 | # Set up a simple relation with just a local col and foreign table |
3980d69c |
224 | sub _make_simple_rel { |
225 | my ($self, $table, $other, $col) = @_; |
708c0939 |
226 | |
3980d69c |
227 | my $table_class = $self->classes->{$table}; |
228 | my $other_class = $self->classes->{$other}; |
229 | my $table_relname = $self->_inflect_relname(lc $table); |
66742793 |
230 | |
3980d69c |
231 | warn qq/\# Belongs_to relationship\n/ if $self->debug; |
16f6b6ac |
232 | warn qq/$table_class->belongs_to( '$col' => '$other_class' );\n\n/ |
3980d69c |
233 | if $self->debug; |
16f6b6ac |
234 | $table_class->belongs_to( $col => $other_class ); |
708c0939 |
235 | |
3980d69c |
236 | warn qq/\# Has_many relationship\n/ if $self->debug; |
16f6b6ac |
237 | warn qq/$other_class->has_many( '$table_relname' => '$table_class',/ |
238 | . qq/$col);\n\n/ |
3980d69c |
239 | if $self->debug; |
708c0939 |
240 | |
16f6b6ac |
241 | $other_class->has_many( $table_relname => $table_class, $col); |
242 | } |
a78e3fed |
243 | |
3980d69c |
244 | # not a class method, just a helper for cond_rel XXX |
245 | sub _stringify_hash { |
246 | my $href = shift; |
247 | |
248 | return '{ ' . |
249 | join(q{, }, map("$_ => $href->{$_}", keys %$href)) |
250 | . ' }'; |
251 | } |
252 | |
16f6b6ac |
253 | # Set up a complex relation based on a hashref condition |
3980d69c |
254 | sub _make_cond_rel { |
255 | my ( $self, $table, $other, $cond ) = @_; |
a78e3fed |
256 | |
3980d69c |
257 | my $table_class = $self->classes->{$table}; |
258 | my $other_class = $self->classes->{$other}; |
259 | my $table_relname = $self->_inflect_relname(lc $table); |
16f6b6ac |
260 | my $other_relname = lc $other; |
708c0939 |
261 | |
16f6b6ac |
262 | # for single-column case, set the relname to the column name, |
263 | # to make filter accessors work |
264 | if(scalar keys %$cond == 1) { |
265 | my ($col) = keys %$cond; |
266 | $other_relname = $cond->{$col}; |
4ce22656 |
267 | } |
16f6b6ac |
268 | |
269 | my $rev_cond = { reverse %$cond }; |
270 | |
c5de0b0c |
271 | for (keys %$rev_cond) { |
c2849787 |
272 | $rev_cond->{"foreign.$_"} = "self.".$rev_cond->{$_}; |
273 | delete $rev_cond->{$_}; |
c5de0b0c |
274 | } |
275 | |
3980d69c |
276 | my $cond_printable = _stringify_hash($cond) |
277 | if $self->debug; |
278 | my $rev_cond_printable = _stringify_hash($rev_cond) |
279 | if $self->debug; |
16f6b6ac |
280 | |
3980d69c |
281 | warn qq/\# Belongs_to relationship\n/ if $self->debug; |
16f6b6ac |
282 | |
283 | warn qq/$table_class->belongs_to( '$other_relname' => '$other_class',/ |
284 | . qq/$cond_printable);\n\n/ |
3980d69c |
285 | if $self->debug; |
16f6b6ac |
286 | |
287 | $table_class->belongs_to( $other_relname => $other_class, $cond); |
288 | |
3980d69c |
289 | warn qq/\# Has_many relationship\n/ if $self->debug; |
16f6b6ac |
290 | |
291 | warn qq/$other_class->has_many( '$table_relname' => '$table_class',/ |
292 | . qq/$rev_cond_printable);\n\n/ |
293 | . qq/);\n\n/ |
3980d69c |
294 | if $self->debug; |
16f6b6ac |
295 | |
296 | $other_class->has_many( $table_relname => $table_class, $rev_cond); |
a78e3fed |
297 | } |
298 | |
42c0680e |
299 | sub _use { |
300 | my $self = shift; |
301 | my $target = shift; |
302 | |
303 | foreach (@_) { |
304 | $_->require or croak ($_ . "->require: $@"); |
305 | eval "package $target; use $_;"; |
306 | croak "use $_: $@" if $@; |
307 | } |
308 | } |
309 | |
310 | sub _inject { |
311 | my $self = shift; |
312 | my $target = shift; |
313 | my $schema = $self->schema; |
314 | |
315 | foreach (@_) { |
316 | $_->require or croak ($_ . "->require: $@"); |
317 | $schema->inject_base($target, $_); |
318 | } |
319 | } |
320 | |
a78e3fed |
321 | # Load and setup classes |
3980d69c |
322 | sub _load_classes { |
323 | my $self = shift; |
af6c2665 |
324 | |
3980d69c |
325 | my @tables = $self->_tables(); |
326 | my @db_classes = $self->_db_classes(); |
327 | my $schema = $self->schema; |
a78e3fed |
328 | |
a78e3fed |
329 | foreach my $table (@tables) { |
3980d69c |
330 | my $constraint = $self->constraint; |
331 | my $exclude = $self->exclude; |
332 | |
333 | next unless $table =~ /$constraint/; |
334 | next if defined $exclude && $table =~ /$exclude/; |
af6c2665 |
335 | |
af6c2665 |
336 | my ($db_schema, $tbl) = split /\./, $table; |
af96f52e |
337 | my $tablename = lc $table; |
a78e3fed |
338 | if($tbl) { |
3980d69c |
339 | $tablename = $self->drop_db_schema ? $tbl : lc $table; |
af6c2665 |
340 | } |
3980d69c |
341 | my $lc_tblname = lc $tablename; |
af6c2665 |
342 | |
3980d69c |
343 | my $table_moniker = $self->_table2moniker($db_schema, $tbl); |
344 | my $table_class = $schema . q{::} . $table_moniker; |
af6c2665 |
345 | |
9fa99683 |
346 | { no strict 'refs'; |
f3be6194 |
347 | @{"${table_class}::ISA"} = qw/DBIx::Class/; |
9fa99683 |
348 | } |
42c0680e |
349 | $self->_use ($table_class, @{$self->additional_classes}); |
9fa99683 |
350 | $self->_inject($table_class, @{$self->additional_base_classes}); |
351 | $table_class->load_components(@{$self->components}, @db_classes, 'Core'); |
352 | $table_class->load_resultset_components(@{$self->resultset_components}) |
353 | if @{$self->resultset_components}; |
42c0680e |
354 | $self->_inject($table_class, @{$self->left_base_classes}); |
3980d69c |
355 | |
356 | warn qq/\# Initializing table "$tablename" as "$table_class"\n/ |
357 | if $self->debug; |
e26a4023 |
358 | $table_class->table($lc_tblname); |
af6c2665 |
359 | |
3980d69c |
360 | my ( $cols, $pks ) = $self->_table_info($table); |
a78e3fed |
361 | carp("$table has no primary key") unless @$pks; |
a4a19f3c |
362 | $table_class->add_columns(@$cols); |
363 | $table_class->set_primary_key(@$pks) if @$pks; |
af6c2665 |
364 | |
3980d69c |
365 | warn qq/$table_class->table('$tablename');\n/ if $self->debug; |
a78e3fed |
366 | my $columns = join "', '", @$cols; |
3980d69c |
367 | warn qq/$table_class->add_columns('$columns')\n/ if $self->debug; |
a78e3fed |
368 | my $primaries = join "', '", @$pks; |
3980d69c |
369 | warn qq/$table_class->set_primary_key('$primaries')\n/ |
370 | if $self->debug && @$pks; |
af6c2665 |
371 | |
c2849787 |
372 | $table_class->require; |
373 | if($@ && $@ !~ /^Can't locate /) { |
374 | croak "Failed to load external class definition" |
375 | . "for '$table_class': $@"; |
376 | } |
377 | |
378 | warn qq/# Loaded external class definition for '$table_class'\n/ |
379 | if $self->debug; |
380 | |
3980d69c |
381 | $schema->register_class($table_moniker, $table_class); |
382 | $self->classes->{$lc_tblname} = $table_class; |
383 | $self->monikers->{$lc_tblname} = $table_moniker; |
a78e3fed |
384 | } |
385 | } |
386 | |
457eb8a6 |
387 | =head2 tables |
3980d69c |
388 | |
8a6b44ef |
389 | Returns a sorted list of loaded tables, using the original database table |
390 | names. Actually generated from the keys of the C<monikers> hash below. |
3980d69c |
391 | |
457eb8a6 |
392 | my @tables = $schema->loader->tables; |
3980d69c |
393 | |
394 | =cut |
395 | |
396 | sub tables { |
397 | my $self = shift; |
398 | |
399 | return sort keys %{ $self->monikers }; |
400 | } |
401 | |
a78e3fed |
402 | # Find and setup relationships |
3980d69c |
403 | sub _load_relationships { |
404 | my $self = shift; |
405 | |
406 | my $dbh = $self->schema->storage->dbh; |
708c0939 |
407 | my $quoter = $dbh->get_info(29) || q{"}; |
3980d69c |
408 | foreach my $table ( $self->tables ) { |
708c0939 |
409 | my $rels = {}; |
410 | my $sth = $dbh->foreign_key_info( '', |
3980d69c |
411 | $self->db_schema, '', '', '', $table ); |
708c0939 |
412 | next if !$sth; |
413 | while(my $raw_rel = $sth->fetchrow_hashref) { |
414 | my $uk_tbl = lc $raw_rel->{UK_TABLE_NAME}; |
415 | my $uk_col = lc $raw_rel->{UK_COLUMN_NAME}; |
416 | my $fk_col = lc $raw_rel->{FK_COLUMN_NAME}; |
4ce22656 |
417 | my $relid = lc $raw_rel->{UK_NAME}; |
708c0939 |
418 | $uk_tbl =~ s/$quoter//g; |
419 | $uk_col =~ s/$quoter//g; |
420 | $fk_col =~ s/$quoter//g; |
4ce22656 |
421 | $relid =~ s/$quoter//g; |
422 | $rels->{$relid}->{tbl} = $uk_tbl; |
423 | $rels->{$relid}->{cols}->{$uk_col} = $fk_col; |
708c0939 |
424 | } |
425 | |
4ce22656 |
426 | foreach my $relid (keys %$rels) { |
427 | my $reltbl = $rels->{$relid}->{tbl}; |
428 | my $cond = $rels->{$relid}->{cols}; |
3980d69c |
429 | eval { $self->_make_cond_rel( $table, $reltbl, $cond ) }; |
708c0939 |
430 | warn qq/\# belongs_to_many failed "$@"\n\n/ |
3980d69c |
431 | if $@ && $self->debug; |
a78e3fed |
432 | } |
433 | } |
434 | } |
435 | |
65644119 |
436 | # Make a moniker from a table |
3980d69c |
437 | sub _table2moniker { |
438 | my ( $self, $db_schema, $table ) = @_; |
af6c2665 |
439 | |
af96f52e |
440 | my $db_schema_ns; |
af6c2665 |
441 | |
af96f52e |
442 | if($table) { |
443 | $db_schema = ucfirst lc $db_schema; |
3980d69c |
444 | $db_schema_ns = $db_schema if(!$self->drop_db_schema); |
af96f52e |
445 | } else { |
446 | $table = $db_schema; |
a78e3fed |
447 | } |
af6c2665 |
448 | |
4350370d |
449 | my $moniker; |
450 | |
451 | if( ref $self->moniker_map eq 'HASH' ) { |
452 | $moniker = $self->moniker_map->{$table}; |
453 | } |
454 | elsif( ref $self->moniker_map eq 'CODE' ) { |
455 | $moniker = $self->moniker_map->($table); |
456 | } |
457 | |
458 | $moniker ||= join '', map ucfirst, split /[\W_]+/, lc $table; |
459 | |
65644119 |
460 | $moniker = $db_schema_ns ? $db_schema_ns . $moniker : $moniker; |
af96f52e |
461 | |
65644119 |
462 | return $moniker; |
a78e3fed |
463 | } |
464 | |
465 | # Overload in driver class |
3980d69c |
466 | sub _tables { croak "ABSTRACT METHOD" } |
a78e3fed |
467 | |
3980d69c |
468 | sub _table_info { croak "ABSTRACT METHOD" } |
a78e3fed |
469 | |
457eb8a6 |
470 | =head2 monikers |
471 | |
472 | Returns a hashref of loaded table-to-moniker mappings for the original |
473 | database table names. |
474 | |
475 | my $monikers = $schema->loader->monikers; |
476 | my $foo_tbl_moniker = $monikers->{foo_tbl}; |
477 | # -or- |
478 | my $foo_tbl_moniker = $schema->loader->monikers->{foo_tbl}; |
479 | # $foo_tbl_moniker would look like "FooTbl" |
480 | |
481 | =head2 classes |
482 | |
483 | Returns a hashref of table-to-classname mappings for the original database |
484 | table names. You probably shouldn't be using this for any normal or simple |
485 | usage of your Schema. The usual way to run queries on your tables is via |
486 | C<$schema-E<gt>resultset('FooTbl')>, where C<FooTbl> is a moniker as |
487 | returned by C<monikers> above. |
488 | |
489 | my $classes = $schema->loader->classes; |
490 | my $foo_tbl_class = $classes->{foo_tbl}; |
491 | # -or- |
492 | my $foo_tbl_class = $schema->loader->classes->{foo_tbl}; |
493 | # $foo_tbl_class would look like "My::Schema::FooTbl", |
494 | # assuming the schema class is "My::Schema" |
495 | |
a78e3fed |
496 | =head1 SEE ALSO |
497 | |
18fca96a |
498 | L<DBIx::Class::Schema::Loader> |
a78e3fed |
499 | |
500 | =cut |
501 | |
502 | 1; |