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1 | package SQL::Translator::Parser::DBIx::Class; |
b02b20b5 |
2 | |
3 | # AUTHOR: Jess Robinson |
4 | |
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5 | # Some mistakes the fault of Matt S Trout |
6 | |
c385ecea |
7 | # Others the fault of Ash Berlin |
8 | |
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9 | use strict; |
10 | use warnings; |
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11 | use vars qw($DEBUG $VERSION @EXPORT_OK); |
12 | $VERSION = '1.10'; |
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13 | $DEBUG = 0 unless defined $DEBUG; |
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14 | |
15 | use Exporter; |
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16 | use SQL::Translator::Utils qw(debug normalize_name); |
48850f9a |
17 | use Carp::Clan qw/^SQL::Translator|^DBIx::Class/; |
3bf702eb |
18 | use Scalar::Util (); |
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19 | |
20 | use base qw(Exporter); |
21 | |
22 | @EXPORT_OK = qw(parse); |
23 | |
24 | # ------------------------------------------------------------------- |
25 | # parse($tr, $data) |
26 | # |
0e2c6809 |
27 | # setting parser_args => { add_fk_index => 0 } will prevent |
28 | # the auto-generation of an index for each FK. |
29 | # |
880a1a0c |
30 | # Note that $data, in the case of this parser, is not useful. |
b02b20b5 |
31 | # We're working with DBIx::Class Schemas, not data streams. |
32 | # ------------------------------------------------------------------- |
33 | sub parse { |
3bf702eb |
34 | # this is a hack to prevent schema leaks due to a retarded SQLT implementation |
2ad89bf5 |
35 | # DO NOT REMOVE (until SQLT2 is out, the all of this will be rewritten anyway) |
02730621 |
36 | Scalar::Util::weaken ($_[1]) if ref ($_[1]); |
3bf702eb |
37 | |
499adf63 |
38 | my ($tr, $data) = @_; |
39 | my $args = $tr->parser_args; |
b7e303a8 |
40 | my $dbicschema = $args->{'DBIx::Class::Schema'} || $args->{"DBIx::Schema"} ||$data; |
41 | $dbicschema ||= $args->{'package'}; |
499adf63 |
42 | my $limit_sources = $args->{'sources'}; |
48850f9a |
43 | |
eb0bc670 |
44 | croak 'No DBIx::Class::Schema' unless ($dbicschema); |
b7e303a8 |
45 | if (!ref $dbicschema) { |
46 | eval "use $dbicschema;"; |
eb0bc670 |
47 | croak "Can't load $dbicschema ($@)" if($@); |
b02b20b5 |
48 | } |
49 | |
50 | my $schema = $tr->schema; |
51 | my $table_no = 0; |
52 | |
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53 | $schema->name( ref($dbicschema) . " v" . ($dbicschema->schema_version || '1.x')) |
b7e303a8 |
54 | unless ($schema->name); |
38e48163 |
55 | |
b7e303a8 |
56 | my @monikers = sort $dbicschema->sources; |
499adf63 |
57 | if ($limit_sources) { |
58 | my $ref = ref $limit_sources || ''; |
eb0bc670 |
59 | $dbicschema->throw_exception ("'sources' parameter must be an array or hash ref") |
60 | unless( $ref eq 'ARRAY' || ref eq 'HASH' ); |
499adf63 |
61 | |
62 | # limit monikers to those specified in |
63 | my $sources; |
64 | if ($ref eq 'ARRAY') { |
65 | $sources->{$_} = 1 for (@$limit_sources); |
66 | } else { |
67 | $sources = $limit_sources; |
68 | } |
69 | @monikers = grep { $sources->{$_} } @monikers; |
70 | } |
71 | |
72 | |
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73 | my(%table_monikers, %view_monikers); |
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74 | for my $moniker (@monikers){ |
75 | my $source = $dbicschema->source($moniker); |
5f5e87cf |
76 | if ( $source->isa('DBIx::Class::ResultSource::Table') ) { |
a7f4b74c |
77 | $table_monikers{$moniker}++; |
5f5e87cf |
78 | } elsif( $source->isa('DBIx::Class::ResultSource::View') ){ |
bccd177f |
79 | next if $source->is_virtual; |
a7f4b74c |
80 | $view_monikers{$moniker}++; |
1d521afd |
81 | } |
82 | } |
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83 | |
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84 | my %tables; |
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85 | foreach my $moniker (sort keys %table_monikers) |
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86 | { |
b7e303a8 |
87 | my $source = $dbicschema->source($moniker); |
48850f9a |
88 | my $table_name = $source->name; |
39be4120 |
89 | |
4678e9da |
90 | # FIXME - this isn't the right way to do it, but sqlt does not |
91 | # support quoting properly to be signaled about this |
a8fcfb9f |
92 | $table_name = $$table_name if ref $table_name eq 'SCALAR'; |
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93 | |
e3d5a547 |
94 | # It's possible to have multiple DBIC sources using the same table |
48850f9a |
95 | next if $tables{$table_name}; |
38e48163 |
96 | |
48850f9a |
97 | $tables{$table_name}{source} = $source; |
98 | my $table = $tables{$table_name}{object} = SQL::Translator::Schema::Table->new( |
99 | name => $table_name, |
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100 | type => 'TABLE', |
48850f9a |
101 | ); |
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102 | foreach my $col ($source->columns) |
103 | { |
d6c79cb3 |
104 | # assuming column_info in dbic is the same as DBI (?) |
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105 | # data_type is a number, column_type is text? |
106 | my %colinfo = ( |
107 | name => $col, |
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108 | size => 0, |
109 | is_auto_increment => 0, |
110 | is_foreign_key => 0, |
111 | is_nullable => 0, |
112 | %{$source->column_info($col)} |
113 | ); |
0009fa49 |
114 | if ($colinfo{is_nullable}) { |
115 | $colinfo{default} = '' unless exists $colinfo{default}; |
116 | } |
eb0bc670 |
117 | my $f = $table->add_field(%colinfo) |
118 | || $dbicschema->throw_exception ($table->error); |
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119 | } |
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120 | |
7b90bb13 |
121 | my @primary = $source->primary_columns; |
36e9e24f |
122 | |
123 | $table->primary_key(@primary) if @primary; |
124 | |
7b90bb13 |
125 | my %unique_constraints = $source->unique_constraints; |
b7e303a8 |
126 | foreach my $uniq (sort keys %unique_constraints) { |
6d0ee587 |
127 | if (!$source->_compare_relationship_keys($unique_constraints{$uniq}, \@primary)) { |
7b90bb13 |
128 | $table->add_constraint( |
129 | type => 'unique', |
a7e65bb5 |
130 | name => $uniq, |
7b90bb13 |
131 | fields => $unique_constraints{$uniq} |
132 | ); |
133 | } |
134 | } |
135 | |
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136 | my @rels = $source->relationships(); |
499adf63 |
137 | |
138 | my %created_FK_rels; |
48850f9a |
139 | |
2581038c |
140 | # global add_fk_index set in parser_args |
a7f4b74c |
141 | my $add_fk_index = (exists $args->{add_fk_index} && ! $args->{add_fk_index}) ? 0 : 1; |
499adf63 |
142 | |
454a5a42 |
143 | foreach my $rel (sort @rels) |
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144 | { |
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145 | |
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146 | my $rel_info = $source->relationship_info($rel); |
637ca936 |
147 | |
637ca936 |
148 | # Ignore any rel cond that isn't a straight hash |
149 | next unless ref $rel_info->{cond} eq 'HASH'; |
150 | |
a7f4b74c |
151 | my $relsource = $source->related_source($rel); |
152 | |
153 | # related sources might be excluded via a {sources} filter or might be views |
154 | next unless exists $table_monikers{$relsource->source_name}; |
155 | |
156 | my $rel_table = $relsource->name; |
4678e9da |
157 | |
158 | # FIXME - this isn't the right way to do it, but sqlt does not |
159 | # support quoting properly to be signaled about this |
160 | $rel_table = $$rel_table if ref $rel_table eq 'SCALAR'; |
de60a93d |
161 | |
e377d723 |
162 | my $reverse_rels = $source->reverse_relationship_info($rel); |
163 | my ($otherrelname, $otherrelationship) = each %{$reverse_rels}; |
164 | |
d1b264d3 |
165 | # Force the order of @cond to match the order of ->add_columns |
166 | my $idx; |
a7f4b74c |
167 | my %other_columns_idx = map {'foreign.'.$_ => ++$idx } $relsource->columns; |
d1b264d3 |
168 | my @cond = sort { $other_columns_idx{$a} cmp $other_columns_idx{$b} } keys(%{$rel_info->{cond}}); |
48850f9a |
169 | |
637ca936 |
170 | # Get the key information, mapping off the foreign/self markers |
637ca936 |
171 | my @refkeys = map {/^\w+\.(\w+)$/} @cond; |
172 | my @keys = map {$rel_info->{cond}->{$_} =~ /^\w+\.(\w+)$/} @cond; |
173 | |
e377d723 |
174 | # determine if this relationship is a self.fk => foreign.pk (i.e. belongs_to) |
175 | my $fk_constraint; |
de60a93d |
176 | |
e377d723 |
177 | #first it can be specified explicitly |
178 | if ( exists $rel_info->{attrs}{is_foreign_key_constraint} ) { |
179 | $fk_constraint = $rel_info->{attrs}{is_foreign_key_constraint}; |
180 | } |
181 | # it can not be multi |
069e49b6 |
182 | elsif ( $rel_info->{attrs}{accessor} |
183 | && $rel_info->{attrs}{accessor} eq 'multi' ) { |
e377d723 |
184 | $fk_constraint = 0; |
185 | } |
186 | # if indeed single, check if all self.columns are our primary keys. |
187 | # this is supposed to indicate a has_one/might_have... |
188 | # where's the introspection!!?? :) |
189 | else { |
6d0ee587 |
190 | $fk_constraint = not $source->_compare_relationship_keys(\@keys, \@primary); |
e377d723 |
191 | } |
de60a93d |
192 | |
e377d723 |
193 | my $cascade; |
194 | for my $c (qw/delete update/) { |
195 | if (exists $rel_info->{attrs}{"on_$c"}) { |
196 | if ($fk_constraint) { |
197 | $cascade->{$c} = $rel_info->{attrs}{"on_$c"}; |
198 | } |
db79c254 |
199 | elsif ( $rel_info->{attrs}{"on_$c"} ) { |
48850f9a |
200 | carp "SQLT attribute 'on_$c' was supplied for relationship '$moniker/$rel', which does not appear to be a foreign constraint. " |
e377d723 |
201 | . "If you are sure that SQLT must generate a constraint for this relationship, add 'is_foreign_key_constraint => 1' to the attributes.\n"; |
202 | } |
203 | } |
204 | elsif (defined $otherrelationship and $otherrelationship->{attrs}{$c eq 'update' ? 'cascade_copy' : 'cascade_delete'}) { |
205 | $cascade->{$c} = 'CASCADE'; |
de60a93d |
206 | } |
e377d723 |
207 | } |
208 | |
cae467a7 |
209 | if($rel_table) { |
e377d723 |
210 | # Constraints are added only if applicable |
211 | next unless $fk_constraint; |
c49ff507 |
212 | |
e377d723 |
213 | # Make sure we dont create the same foreign key constraint twice |
e3d5a547 |
214 | my $key_test = join("\x00", sort @keys); |
e377d723 |
215 | next if $created_FK_rels{$rel_table}->{$key_test}; |
c49ff507 |
216 | |
48850f9a |
217 | if (scalar(@keys)) { |
48850f9a |
218 | $created_FK_rels{$rel_table}->{$key_test} = 1; |
13de943d |
219 | |
48850f9a |
220 | my $is_deferrable = $rel_info->{attrs}{is_deferrable}; |
221 | |
a7f4b74c |
222 | # calculate dependencies: do not consider deferrable constraints and |
223 | # self-references for dependency calculations |
48850f9a |
224 | if (! $is_deferrable and $rel_table ne $table_name) { |
225 | $tables{$table_name}{foreign_table_deps}{$rel_table}++; |
226 | } |
a7f4b74c |
227 | |
7b5d0b84 |
228 | $table->add_constraint( |
cae467a7 |
229 | type => 'foreign_key', |
230 | name => join('_', $table_name, 'fk', @keys), |
231 | fields => \@keys, |
232 | reference_fields => \@refkeys, |
233 | reference_table => $rel_table, |
234 | on_delete => uc ($cascade->{delete} || ''), |
235 | on_update => uc ($cascade->{update} || ''), |
236 | (defined $is_deferrable ? ( deferrable => $is_deferrable ) : ()), |
7b5d0b84 |
237 | ); |
48850f9a |
238 | |
239 | # global parser_args add_fk_index param can be overridden on the rel def |
240 | my $add_fk_index_rel = (exists $rel_info->{attrs}{add_fk_index}) ? $rel_info->{attrs}{add_fk_index} : $add_fk_index; |
5930bfc2 |
241 | |
c49ff507 |
242 | # Check that we do not create an index identical to the PK index |
243 | # (some RDBMS croak on this, and it generally doesn't make much sense) |
244 | # NOTE: we do not sort the key columns because the order of |
5930bfc2 |
245 | # columns is important for indexes and two indexes with the |
246 | # same cols but different order are allowed and sometimes |
247 | # needed |
c49ff507 |
248 | next if join("\x00", @keys) eq join("\x00", @primary); |
48850f9a |
249 | |
2581038c |
250 | if ($add_fk_index_rel) { |
0e2c6809 |
251 | my $index = $table->add_index( |
5930bfc2 |
252 | name => join('_', $table_name, 'idx', @keys), |
253 | fields => \@keys, |
254 | type => 'NORMAL', |
255 | ); |
0e2c6809 |
256 | } |
257 | } |
b02b20b5 |
258 | } |
259 | } |
48850f9a |
260 | |
b02b20b5 |
261 | } |
d6c79cb3 |
262 | |
48850f9a |
263 | # attach the tables to the schema in dependency order |
264 | my $dependencies = { |
265 | map { $_ => _resolve_deps ($_, \%tables) } (keys %tables) |
266 | }; |
267 | for my $table (sort |
268 | { |
269 | keys %{$dependencies->{$a} || {} } <=> keys %{ $dependencies->{$b} || {} } |
270 | || |
271 | $a cmp $b |
272 | } |
273 | (keys %tables) |
274 | ) { |
275 | $schema->add_table ($tables{$table}{object}); |
276 | $tables{$table}{source} -> _invoke_sqlt_deploy_hook( $tables{$table}{object} ); |
48850f9a |
277 | |
7adc2091 |
278 | # the hook might have already removed the table |
279 | if ($schema->get_table($table) && $table =~ /^ \s* \( \s* SELECT \s+/ix) { |
280 | warn <<'EOW'; |
a8fcfb9f |
281 | |
7adc2091 |
282 | Custom SQL through ->name(\'( SELECT ...') is DEPRECATED, for more details see |
283 | "Arbitrary SQL through a custom ResultSource" in DBIx::Class::Manual::Cookbook |
284 | or http://search.cpan.org/dist/DBIx-Class/lib/DBIx/Class/Manual/Cookbook.pod |
39be4120 |
285 | |
7adc2091 |
286 | EOW |
39be4120 |
287 | |
7adc2091 |
288 | # remove the table as there is no way someone might want to |
289 | # actually deploy this |
290 | $schema->drop_table ($table); |
39be4120 |
291 | } |
292 | } |
48850f9a |
293 | |
294 | my %views; |
a7f4b74c |
295 | foreach my $moniker (sort keys %view_monikers) |
1d521afd |
296 | { |
297 | my $source = $dbicschema->source($moniker); |
48850f9a |
298 | my $view_name = $source->name; |
4678e9da |
299 | |
300 | # FIXME - this isn't the right way to do it, but sqlt does not |
301 | # support quoting properly to be signaled about this |
302 | $view_name = $$view_name if ref $view_name eq 'SCALAR'; |
48850f9a |
303 | |
1d521afd |
304 | # Skip custom query sources |
48850f9a |
305 | next if ref $view_name; |
1d521afd |
306 | |
307 | # Its possible to have multiple DBIC source using same table |
48850f9a |
308 | next if $views{$view_name}++; |
1d521afd |
309 | |
ab7e74aa |
310 | $dbicschema->throw_exception ("view $view_name is missing a view_definition") |
311 | unless $source->view_definition; |
8f1617e2 |
312 | |
48850f9a |
313 | my $view = $schema->add_view ( |
314 | name => $view_name, |
1d521afd |
315 | fields => [ $source->columns ], |
f534e33b |
316 | $source->view_definition ? ( 'sql' => $source->view_definition ) : () |
eb0bc670 |
317 | ) || $dbicschema->throw_exception ($schema->error); |
a99b214b |
318 | |
319 | $source->_invoke_sqlt_deploy_hook($view); |
1d521afd |
320 | } |
321 | |
48850f9a |
322 | |
b7e303a8 |
323 | if ($dbicschema->can('sqlt_deploy_hook')) { |
324 | $dbicschema->sqlt_deploy_hook($schema); |
d6c79cb3 |
325 | } |
326 | |
637ca936 |
327 | return 1; |
75d07914 |
328 | } |
b02b20b5 |
329 | |
48850f9a |
330 | # |
331 | # Quick and dirty dependency graph calculator |
332 | # |
333 | sub _resolve_deps { |
334 | my ($table, $tables, $seen) = @_; |
335 | |
336 | my $ret = {}; |
337 | $seen ||= {}; |
338 | |
339 | # copy and bump all deps by one (so we can reconstruct the chain) |
340 | my %seen = map { $_ => $seen->{$_} + 1 } (keys %$seen); |
341 | $seen{$table} = 1; |
342 | |
343 | for my $dep (keys %{$tables->{$table}{foreign_table_deps}} ) { |
344 | |
345 | if ($seen->{$dep}) { |
346 | |
347 | # warn and remove the circular constraint so we don't get flooded with the same warning over and over |
348 | #carp sprintf ("Circular dependency detected, schema may not be deployable:\n%s\n", |
349 | # join (' -> ', (sort { $seen->{$b} <=> $seen->{$a} } (keys %$seen) ), $table, $dep ) |
350 | #); |
351 | #delete $tables->{$table}{foreign_table_deps}{$dep}; |
352 | |
353 | return {}; |
354 | } |
355 | |
356 | my $subdeps = _resolve_deps ($dep, $tables, \%seen); |
357 | $ret->{$_} += $subdeps->{$_} for ( keys %$subdeps ); |
358 | |
359 | ++$ret->{$dep}; |
360 | } |
361 | |
362 | return $ret; |
363 | } |
364 | |
0da8b7da |
365 | 1; |
7232ce07 |
366 | |
367 | =head1 NAME |
368 | |
369 | SQL::Translator::Parser::DBIx::Class - Create a SQL::Translator schema |
370 | from a DBIx::Class::Schema instance |
371 | |
372 | =head1 SYNOPSIS |
373 | |
f26d4b95 |
374 | ## Via DBIx::Class |
375 | use MyApp::Schema; |
376 | my $schema = MyApp::Schema->connect("dbi:SQLite:something.db"); |
377 | $schema->create_ddl_dir(); |
378 | ## or |
379 | $schema->deploy(); |
380 | |
381 | ## Standalone |
7232ce07 |
382 | use MyApp::Schema; |
383 | use SQL::Translator; |
d4daee7b |
384 | |
7232ce07 |
385 | my $schema = MyApp::Schema->connect; |
386 | my $trans = SQL::Translator->new ( |
387 | parser => 'SQL::Translator::Parser::DBIx::Class', |
37cb0de1 |
388 | parser_args => { |
389 | package => $schema, |
cae467a7 |
390 | add_fk_index => 0, |
37cb0de1 |
391 | sources => [qw/ |
392 | Artist |
393 | CD |
394 | /], |
395 | }, |
7232ce07 |
396 | producer => 'SQLite', |
397 | ) or die SQL::Translator->error; |
398 | my $out = $trans->translate() or die $trans->error; |
399 | |
400 | =head1 DESCRIPTION |
401 | |
f26d4b95 |
402 | This class requires L<SQL::Translator> installed to work. |
403 | |
7232ce07 |
404 | C<SQL::Translator::Parser::DBIx::Class> reads a DBIx::Class schema, |
405 | interrogates the columns, and stuffs it all in an $sqlt_schema object. |
406 | |
faaba25f |
407 | Its primary use is in deploying database layouts described as a set |
db2b2eb6 |
408 | of L<DBIx::Class> classes, to a database. To do this, see |
409 | L<DBIx::Class::Schema/deploy>. |
f26d4b95 |
410 | |
411 | This can also be achieved by having DBIx::Class export the schema as a |
412 | set of SQL files ready for import into your database, or passed to |
413 | other machines that need to have your application installed but don't |
db2b2eb6 |
414 | have SQL::Translator installed. To do this see |
415 | L<DBIx::Class::Schema/create_ddl_dir>. |
f26d4b95 |
416 | |
cae467a7 |
417 | =head1 PARSER OPTIONS |
418 | |
419 | =head2 add_fk_index |
420 | |
421 | Create an index for each foreign key. |
ad91ed74 |
422 | Enabled by default, as having indexed foreign key columns is normally the |
423 | sensible thing to do. |
cae467a7 |
424 | |
425 | =head2 sources |
426 | |
427 | =over 4 |
428 | |
f0ac764e |
429 | =item Arguments: \@class_names |
cae467a7 |
430 | |
431 | =back |
ad91ed74 |
432 | |
433 | Limit the amount of parsed sources by supplying an explicit list of source names. |
cae467a7 |
434 | |
7232ce07 |
435 | =head1 SEE ALSO |
436 | |
f26d4b95 |
437 | L<SQL::Translator>, L<DBIx::Class::Schema> |
7232ce07 |
438 | |
439 | =head1 AUTHORS |
440 | |
827a808f |
441 | See L<DBIx::Class/CONTRIBUTORS>. |
7232ce07 |
442 | |
827a808f |
443 | =head1 LICENSE |
7232ce07 |
444 | |
827a808f |
445 | You may distribute this code under the same terms as Perl itself. |
cae467a7 |
446 | |
827a808f |
447 | =cut |