Commit | Line | Data |
996be9ee |
1 | package DBIx::Class::Schema::Loader::RelBuilder; |
2 | |
3 | use strict; |
4 | use warnings; |
1ad8e8c3 |
5 | use base 'Class::Accessor::Grouped'; |
942bd5e0 |
6 | use mro 'c3'; |
fa994d3c |
7 | use Carp::Clan qw/^DBIx::Class/; |
1ad8e8c3 |
8 | use Scalar::Util 'weaken'; |
fcf328c7 |
9 | use DBIx::Class::Schema::Loader::Utils qw/split_name slurp_file/; |
1ad8e8c3 |
10 | use Try::Tiny; |
1ad8e8c3 |
11 | use List::MoreUtils 'apply'; |
12 | use namespace::clean; |
c4a69b87 |
13 | use Lingua::EN::Inflect::Phrase (); |
14 | use Lingua::EN::Tagger (); |
15 | use Class::Unload (); |
16 | use Class::Inspector (); |
996be9ee |
17 | |
4295c4b4 |
18 | our $VERSION = '0.07010'; |
32f784fc |
19 | |
6e4b7bb1 |
20 | # Glossary: |
21 | # |
22 | # remote_relname -- name of relationship from the local table referring to the remote table |
23 | # local_relname -- name of relationship from the remote table referring to the local table |
24 | # remote_method -- relationship type from remote table to local table, usually has_many |
25 | |
996be9ee |
26 | =head1 NAME |
27 | |
28 | DBIx::Class::Schema::Loader::RelBuilder - Builds relationships for DBIx::Class::Schema::Loader |
29 | |
30 | =head1 SYNOPSIS |
31 | |
19b7d71c |
32 | See L<DBIx::Class::Schema::Loader> and L<DBIx::Class::Schema::Loader::Base>. |
996be9ee |
33 | |
34 | =head1 DESCRIPTION |
35 | |
36 | This class builds relationships for L<DBIx::Class::Schema::Loader>. This |
37 | is module is not (yet) for external use. |
38 | |
39 | =head1 METHODS |
40 | |
41 | =head2 new |
42 | |
404aefa4 |
43 | Arguments: $loader object |
996be9ee |
44 | |
45 | =head2 generate_code |
46 | |
dc379dc6 |
47 | Arguments: |
48 | |
c4a69b87 |
49 | [ |
50 | [ local_moniker1 (scalar), fk_info1 (arrayref), uniq_info1 (arrayref) ] |
51 | [ local_moniker2 (scalar), fk_info2 (arrayref), uniq_info2 (arrayref) ] |
dc379dc6 |
52 | ... |
c4a69b87 |
53 | ] |
e8ad6491 |
54 | |
dc379dc6 |
55 | This generates the code for the relationships of each table. |
e8ad6491 |
56 | |
57 | C<local_moniker> is the moniker name of the table which had the REFERENCES |
58 | statements. The fk_info arrayref's contents should take the form: |
59 | |
60 | [ |
61 | { |
c4a69b87 |
62 | local_table => 'some_table', |
63 | local_moniker => 'SomeTable', |
64 | local_columns => [ 'col2', 'col3' ], |
65 | remote_table => 'another_table_moniker', |
e8ad6491 |
66 | remote_moniker => 'AnotherTableMoniker', |
c4a69b87 |
67 | remote_columns => [ 'col5', 'col7' ], |
e8ad6491 |
68 | }, |
69 | { |
c4a69b87 |
70 | local_table => 'some_other_table', |
71 | local_moniker => 'SomeOtherTable', |
72 | local_columns => [ 'col1', 'col4' ], |
73 | remote_table => 'yet_another_table_moniker', |
e8ad6491 |
74 | remote_moniker => 'YetAnotherTableMoniker', |
c4a69b87 |
75 | remote_columns => [ 'col1', 'col2' ], |
e8ad6491 |
76 | }, |
77 | # ... |
78 | ], |
79 | |
dc379dc6 |
80 | The uniq_info arrayref's contents should take the form: |
81 | |
82 | [ |
83 | [ |
84 | uniq_constraint_name => [ 'col1', 'col2' ], |
85 | ], |
86 | [ |
87 | another_uniq_constraint_name => [ 'col1', 'col2' ], |
88 | ], |
89 | ], |
90 | |
e8ad6491 |
91 | This method will return the generated relationships as a hashref keyed on the |
92 | class names. The values are arrayrefs of hashes containing method name and |
93 | arguments, like so: |
996be9ee |
94 | |
95 | { |
96 | 'Some::Source::Class' => [ |
b97c2c1e |
97 | { method => 'belongs_to', arguments => [ 'col1', 'Another::Source::Class' ], |
98 | { method => 'has_many', arguments => [ 'anothers', 'Yet::Another::Source::Class', 'col15' ], |
996be9ee |
99 | ], |
100 | 'Another::Source::Class' => [ |
101 | # ... |
102 | ], |
103 | # ... |
104 | } |
8f9d7ce5 |
105 | |
996be9ee |
106 | =cut |
107 | |
1ad8e8c3 |
108 | __PACKAGE__->mk_group_accessors('simple', qw/ |
404aefa4 |
109 | loader |
1ad8e8c3 |
110 | schema |
111 | inflect_plural |
112 | inflect_singular |
113 | relationship_attrs |
a7116285 |
114 | rel_collision_map |
59388920 |
115 | rel_name_map |
1ad8e8c3 |
116 | _temp_classes |
dc379dc6 |
117 | __tagger |
1ad8e8c3 |
118 | /); |
4c7b5f46 |
119 | |
996be9ee |
120 | sub new { |
404aefa4 |
121 | my ($class, $loader) = @_; |
4c7b5f46 |
122 | |
123 | # from old POD about this constructor: |
124 | # C<$schema_class> should be a schema class name, where the source |
125 | # classes have already been set up and registered. Column info, |
126 | # primary key, and unique constraints will be drawn from this |
127 | # schema for all of the existing source monikers. |
128 | |
129 | # Options inflect_plural and inflect_singular are optional, and |
130 | # are better documented in L<DBIx::Class::Schema::Loader::Base>. |
996be9ee |
131 | |
132 | my $self = { |
404aefa4 |
133 | loader => $loader, |
134 | schema => $loader->schema, |
135 | inflect_plural => $loader->inflect_plural, |
136 | inflect_singular => $loader->inflect_singular, |
137 | relationship_attrs => $loader->relationship_attrs, |
138 | rel_collision_map => $loader->rel_collision_map, |
139 | rel_name_map => $loader->rel_name_map, |
1ad8e8c3 |
140 | _temp_classes => [], |
996be9ee |
141 | }; |
142 | |
404aefa4 |
143 | weaken $self->{loader}; #< don't leak |
1ad8e8c3 |
144 | |
145 | bless $self => $class; |
4c7b5f46 |
146 | |
c8c27020 |
147 | # validate the relationship_attrs arg |
1ad8e8c3 |
148 | if( defined $self->relationship_attrs ) { |
5c06aa08 |
149 | ref $self->relationship_attrs eq 'HASH' |
150 | or croak "relationship_attrs must be a hashref"; |
c8c27020 |
151 | } |
996be9ee |
152 | |
1ad8e8c3 |
153 | return $self; |
996be9ee |
154 | } |
155 | |
156 | |
157 | # pluralize a relationship name |
158 | sub _inflect_plural { |
ecf930e6 |
159 | my ($self, $relname) = @_; |
996be9ee |
160 | |
39ef3bfe |
161 | return '' if !defined $relname || $relname eq ''; |
162 | |
59388920 |
163 | my $result; |
164 | my $mapped = 0; |
165 | |
1ad8e8c3 |
166 | if( ref $self->inflect_plural eq 'HASH' ) { |
59388920 |
167 | if (exists $self->inflect_plural->{$relname}) { |
168 | $result = $self->inflect_plural->{$relname}; |
169 | $mapped = 1; |
170 | } |
996be9ee |
171 | } |
1ad8e8c3 |
172 | elsif( ref $self->inflect_plural eq 'CODE' ) { |
173 | my $inflected = $self->inflect_plural->($relname); |
59388920 |
174 | if ($inflected) { |
175 | $result = $inflected; |
176 | $mapped = 1; |
177 | } |
996be9ee |
178 | } |
179 | |
59388920 |
180 | return ($result, $mapped) if $mapped; |
181 | |
182 | return ($self->_to_PL($relname), 0); |
996be9ee |
183 | } |
184 | |
185 | # Singularize a relationship name |
186 | sub _inflect_singular { |
ecf930e6 |
187 | my ($self, $relname) = @_; |
996be9ee |
188 | |
39ef3bfe |
189 | return '' if !defined $relname || $relname eq ''; |
190 | |
59388920 |
191 | my $result; |
192 | my $mapped = 0; |
193 | |
1ad8e8c3 |
194 | if( ref $self->inflect_singular eq 'HASH' ) { |
59388920 |
195 | if (exists $self->inflect_singular->{$relname}) { |
196 | $result = $self->inflect_singular->{$relname}; |
197 | $mapped = 1; |
198 | } |
996be9ee |
199 | } |
1ad8e8c3 |
200 | elsif( ref $self->inflect_singular eq 'CODE' ) { |
201 | my $inflected = $self->inflect_singular->($relname); |
59388920 |
202 | if ($inflected) { |
203 | $result = $inflected; |
204 | $mapped = 1; |
205 | } |
996be9ee |
206 | } |
207 | |
59388920 |
208 | return ($result, $mapped) if $mapped; |
209 | |
210 | return ($self->_to_S($relname), 0); |
c496748b |
211 | } |
212 | |
213 | sub _to_PL { |
214 | my ($self, $name) = @_; |
215 | |
216 | $name =~ s/_/ /g; |
39b22ca9 |
217 | my $plural = Lingua::EN::Inflect::Phrase::to_PL($name); |
c496748b |
218 | $plural =~ s/ /_/g; |
219 | |
220 | return $plural; |
221 | } |
222 | |
c496748b |
223 | sub _to_S { |
224 | my ($self, $name) = @_; |
225 | |
39b22ca9 |
226 | $name =~ s/_/ /g; |
227 | my $singular = Lingua::EN::Inflect::Phrase::to_S($name); |
228 | $singular =~ s/ /_/g; |
229 | |
230 | return $singular; |
996be9ee |
231 | } |
232 | |
53ef681d |
233 | sub _default_relationship_attrs { +{ |
234 | has_many => { |
235 | cascade_delete => 0, |
236 | cascade_copy => 0, |
237 | }, |
238 | might_have => { |
239 | cascade_delete => 0, |
240 | cascade_copy => 0, |
241 | }, |
242 | belongs_to => { |
243 | on_delete => 'CASCADE', |
244 | on_update => 'CASCADE', |
aa0867ee |
245 | is_deferrable => 1, |
53ef681d |
246 | }, |
247 | } } |
248 | |
c8c27020 |
249 | # accessor for options to be passed to each generated relationship |
250 | # type. take single argument, the relationship type name, and returns |
251 | # either a hashref (if some options are set), or nothing |
252 | sub _relationship_attrs { |
253 | my ( $self, $reltype ) = @_; |
1ad8e8c3 |
254 | my $r = $self->relationship_attrs; |
c8c27020 |
255 | |
53ef681d |
256 | my %composite = ( |
257 | %{ $self->_default_relationship_attrs->{$reltype} || {} }, |
258 | %{ $r->{all} || {} } |
259 | ); |
260 | |
c8c27020 |
261 | if( my $specific = $r->{$reltype} ) { |
5c06aa08 |
262 | while( my ($k,$v) = each %$specific ) { |
263 | $composite{$k} = $v; |
264 | } |
c8c27020 |
265 | } |
266 | return \%composite; |
267 | } |
268 | |
26f1c8c9 |
269 | sub _array_eq { |
ecf930e6 |
270 | my ($self, $a, $b) = @_; |
26f1c8c9 |
271 | |
272 | return unless @$a == @$b; |
273 | |
274 | for (my $i = 0; $i < @$a; $i++) { |
275 | return unless $a->[$i] eq $b->[$i]; |
276 | } |
277 | return 1; |
278 | } |
279 | |
c39e403e |
280 | sub _remote_attrs { |
c496748b |
281 | my ($self, $local_moniker, $local_cols) = @_; |
c39e403e |
282 | |
c496748b |
283 | # get our base set of attrs from _relationship_attrs, if present |
284 | my $attrs = $self->_relationship_attrs('belongs_to') || {}; |
c8c27020 |
285 | |
c496748b |
286 | # If the referring column is nullable, make 'belongs_to' an |
287 | # outer join, unless explicitly set by relationship_attrs |
1ad8e8c3 |
288 | my $nullable = grep { $self->schema->source($local_moniker)->column_info($_)->{is_nullable} } @$local_cols; |
c496748b |
289 | $attrs->{join_type} = 'LEFT' if $nullable && !defined $attrs->{join_type}; |
c39e403e |
290 | |
c496748b |
291 | return $attrs; |
c39e403e |
292 | } |
293 | |
414c61a0 |
294 | sub _sanitize_name { |
295 | my ($self, $name) = @_; |
296 | |
c4a69b87 |
297 | $name =~ s/\W+/_/g; |
414c61a0 |
298 | |
299 | return $name; |
300 | } |
301 | |
19b7d71c |
302 | sub _normalize_name { |
303 | my ($self, $name) = @_; |
304 | |
414c61a0 |
305 | $name = $self->_sanitize_name($name); |
306 | |
cc4f11a2 |
307 | my @words = split_name $name; |
19b7d71c |
308 | |
309 | return join '_', map lc, @words; |
310 | } |
311 | |
f2fc8d01 |
312 | sub _remote_relname { |
313 | my ($self, $remote_table, $cond) = @_; |
314 | |
315 | my $remote_relname; |
316 | # for single-column case, set the remote relname to the column |
317 | # name, to make filter accessors work, but strip trailing _id |
318 | if(scalar keys %{$cond} == 1) { |
319 | my ($col) = values %{$cond}; |
19b7d71c |
320 | $col = $self->_normalize_name($col); |
f2fc8d01 |
321 | $col =~ s/_id$//; |
59388920 |
322 | ($remote_relname) = $self->_inflect_singular($col); |
f2fc8d01 |
323 | } |
324 | else { |
59388920 |
325 | ($remote_relname) = $self->_inflect_singular($self->_normalize_name($remote_table)); |
f2fc8d01 |
326 | } |
327 | |
328 | return $remote_relname; |
329 | } |
330 | |
a7116285 |
331 | sub _resolve_relname_collision { |
332 | my ($self, $moniker, $cols, $relname) = @_; |
333 | |
334 | return $relname if $relname eq 'id'; # this shouldn't happen, but just in case |
335 | |
c4a69b87 |
336 | my $table = $self->loader->moniker_to_table->{$moniker}; |
dc379dc6 |
337 | |
404aefa4 |
338 | if ($self->loader->_is_result_class_method($relname, $table)) { |
a7116285 |
339 | if (my $map = $self->rel_collision_map) { |
340 | for my $re (keys %$map) { |
341 | if (my @matches = $relname =~ /$re/) { |
342 | return sprintf $map->{$re}, @matches; |
343 | } |
344 | } |
345 | } |
346 | |
347 | my $new_relname = $relname; |
404aefa4 |
348 | while ($self->loader->_is_result_class_method($new_relname, $table)) { |
a7116285 |
349 | $new_relname .= '_rel' |
350 | } |
351 | |
352 | warn <<"EOF"; |
c4a69b87 |
353 | Relationship '$relname' in source '$moniker' for columns '@{[ join ',', @$cols ]}' collides with an inherited method. Renaming to '$new_relname'. |
a7116285 |
354 | See "RELATIONSHIP NAME COLLISIONS" in perldoc DBIx::Class::Schema::Loader::Base . |
355 | EOF |
356 | |
357 | return $new_relname; |
358 | } |
359 | |
360 | return $relname; |
361 | } |
362 | |
996be9ee |
363 | sub generate_code { |
dc379dc6 |
364 | my ($self, $tables) = @_; |
365 | |
366 | # make a copy to destroy |
367 | my @tables = @$tables; |
996be9ee |
368 | |
369 | my $all_code = {}; |
370 | |
dc379dc6 |
371 | while (my ($local_moniker, $rels, $uniqs) = @{ shift @tables || [] }) { |
372 | my $local_class = $self->schema->class($local_moniker); |
057fbb08 |
373 | |
dc379dc6 |
374 | my %counters; |
375 | foreach my $rel (@$rels) { |
376 | next if !$rel->{remote_source}; |
377 | $counters{$rel->{remote_source}}++; |
378 | } |
e8ad6491 |
379 | |
dc379dc6 |
380 | foreach my $rel (@$rels) { |
381 | my $remote_moniker = $rel->{remote_source} |
382 | or next; |
057fbb08 |
383 | |
dc379dc6 |
384 | my $remote_class = $self->schema->class($remote_moniker); |
385 | my $remote_obj = $self->schema->source($remote_moniker); |
386 | my $remote_cols = $rel->{remote_columns} || [ $remote_obj->primary_columns ]; |
057fbb08 |
387 | |
dc379dc6 |
388 | my $local_cols = $rel->{local_columns}; |
e8ad6491 |
389 | |
dc379dc6 |
390 | if($#$local_cols != $#$remote_cols) { |
391 | croak "Column count mismatch: $local_moniker (@$local_cols) " |
392 | . "$remote_moniker (@$remote_cols)"; |
393 | } |
996be9ee |
394 | |
dc379dc6 |
395 | my %cond; |
396 | foreach my $i (0 .. $#$local_cols) { |
397 | $cond{$remote_cols->[$i]} = $local_cols->[$i]; |
398 | } |
399 | |
400 | my ( $local_relname, $remote_relname, $remote_method ) = |
401 | $self->_relnames_and_method( $local_moniker, $rel, \%cond, $uniqs, \%counters ); |
59388920 |
402 | my $local_method = 'belongs_to'; |
403 | |
404 | ($remote_relname) = $self->_rel_name_map($remote_relname, $local_method, $local_class, $local_moniker, $local_cols, $remote_class, $remote_moniker, $remote_cols); |
405 | ($local_relname) = $self->_rel_name_map($local_relname, $remote_method, $remote_class, $remote_moniker, $remote_cols, $local_class, $local_moniker, $local_cols); |
dc379dc6 |
406 | |
59388920 |
407 | $remote_relname = $self->_resolve_relname_collision($local_moniker, $local_cols, $remote_relname); |
408 | $local_relname = $self->_resolve_relname_collision($remote_moniker, $remote_cols, $local_relname); |
dc379dc6 |
409 | |
410 | push(@{$all_code->{$local_class}}, |
59388920 |
411 | { method => $local_method, |
dc379dc6 |
412 | args => [ $remote_relname, |
413 | $remote_class, |
414 | \%cond, |
415 | $self->_remote_attrs($local_moniker, $local_cols), |
416 | ], |
417 | extra => { |
59388920 |
418 | local_class => $local_class, |
419 | local_moniker => $local_moniker, |
420 | remote_moniker => $remote_moniker, |
dc379dc6 |
421 | }, |
422 | } |
423 | ); |
424 | |
425 | my %rev_cond = reverse %cond; |
426 | for (keys %rev_cond) { |
427 | $rev_cond{"foreign.$_"} = "self.".$rev_cond{$_}; |
428 | delete $rev_cond{$_}; |
429 | } |
430 | |
431 | push(@{$all_code->{$remote_class}}, |
432 | { method => $remote_method, |
433 | args => [ $local_relname, |
434 | $local_class, |
435 | \%rev_cond, |
436 | $self->_relationship_attrs($remote_method), |
437 | ], |
438 | extra => { |
59388920 |
439 | local_class => $remote_class, |
440 | local_moniker => $remote_moniker, |
441 | remote_moniker => $local_moniker, |
dc379dc6 |
442 | }, |
443 | } |
444 | ); |
e8ad6491 |
445 | } |
dc379dc6 |
446 | } |
447 | |
448 | # disambiguate rels with the same name |
449 | foreach my $class (keys %$all_code) { |
450 | my $dups = $self->_duplicates($all_code->{$class}); |
996be9ee |
451 | |
dc379dc6 |
452 | $self->_disambiguate($all_code->{$class}, $dups) if $dups; |
453 | } |
454 | |
455 | $self->_cleanup; |
456 | |
457 | return $all_code; |
458 | } |
459 | |
460 | sub _duplicates { |
461 | my ($self, $rels) = @_; |
462 | |
463 | my @rels = map [ $_->{args}[0] => $_ ], @$rels; |
464 | my %rel_names; |
465 | $rel_names{$_}++ foreach map $_->[0], @rels; |
466 | |
467 | my @dups = grep $rel_names{$_} > 1, keys %rel_names; |
468 | |
469 | my %dups; |
470 | |
471 | foreach my $dup (@dups) { |
472 | $dups{$dup} = [ map $_->[1], grep { $_->[0] eq $dup } @rels ]; |
473 | } |
474 | |
475 | return if not %dups; |
476 | |
477 | return \%dups; |
478 | } |
479 | |
480 | sub _tagger { |
481 | my $self = shift; |
482 | |
483 | $self->__tagger(Lingua::EN::Tagger->new) unless $self->__tagger; |
484 | |
485 | return $self->__tagger; |
486 | } |
7dba7c70 |
487 | |
dc379dc6 |
488 | sub _adjectives { |
489 | my ($self, @cols) = @_; |
a7116285 |
490 | |
dc379dc6 |
491 | my @adjectives; |
492 | |
493 | foreach my $col (@cols) { |
494 | my @words = split_name $col; |
495 | |
496 | my $tagged = $self->_tagger->get_readable(join ' ', @words); |
497 | |
498 | push @adjectives, $tagged =~ m{\G(\w+)/JJ\s+}g; |
499 | } |
500 | |
501 | return @adjectives; |
502 | } |
503 | |
504 | sub _disambiguate { |
505 | my ($self, $all_rels, $dups) = @_; |
506 | |
507 | foreach my $dup (keys %$dups) { |
508 | my @rels = @{ $dups->{$dup} }; |
509 | |
510 | foreach my $rel (@rels) { |
511 | next if $rel->{method} eq 'belongs_to'; |
512 | |
513 | my @to_cols = apply { s/^foreign\.//i } |
514 | keys %{ $rel->{args}[2] }; |
515 | |
516 | my @adjectives = $self->_adjectives(@to_cols); |
517 | |
518 | # If there are no adjectives, and there is only one might_have |
519 | # rel to that class, we hardcode 'active'. |
520 | |
521 | my $to_class = $rel->{args}[1]; |
522 | |
523 | if ((not @adjectives) |
524 | && (grep { $_->{method} eq 'might_have' |
525 | && $_->{args}[1] eq $to_class } @$all_rels) == 1) { |
526 | |
527 | @adjectives = 'active'; |
996be9ee |
528 | } |
e8ad6491 |
529 | |
dc379dc6 |
530 | if (@adjectives) { |
531 | my $rel_name = join '_', sort(@adjectives), $rel->{args}[0]; |
532 | |
59388920 |
533 | ($rel_name) = $rel->{method} eq 'might_have' ? |
dc379dc6 |
534 | $self->_inflect_singular($rel_name) |
535 | : |
536 | $self->_inflect_plural($rel_name); |
537 | |
59388920 |
538 | my ($local_class, $local_moniker, $remote_moniker) |
539 | = @{ $rel->{extra} } |
540 | {qw/local_class local_moniker remote_moniker/}; |
dc379dc6 |
541 | |
542 | my @from_cols = apply { s/^self\.//i } |
543 | values %{ $rel->{args}[2] }; |
057fbb08 |
544 | |
59388920 |
545 | ($rel_name) = $self->_rel_name_map($rel_name, $rel->{method}, $local_class, $local_moniker, \@from_cols, $to_class, $remote_moniker, \@to_cols); |
546 | |
547 | $rel_name = $self->_resolve_relname_collision($local_moniker, \@from_cols, $rel_name); |
dc379dc6 |
548 | |
549 | $rel->{args}[0] = $rel_name; |
e8ad6491 |
550 | } |
dc379dc6 |
551 | } |
996be9ee |
552 | } |
553 | |
dc379dc6 |
554 | # Check again for duplicates, since the heuristics above may not have resolved them all. |
555 | |
556 | if ($dups = $self->_duplicates($all_rels)) { |
557 | foreach my $dup (keys %$dups) { |
558 | # sort by method |
559 | my @rels = map $_->[1], sort { $a->[0] <=> $b->[0] } map [ |
560 | ($_->{method} eq 'belongs_to' ? 3 : $_->{method} eq 'has_many' ? 2 : 1), $_ |
561 | ], @{ $dups->{$dup} }; |
562 | |
563 | my $rel_num = 2; |
564 | |
565 | foreach my $rel (@rels[1 .. $#rels]) { |
566 | my $inflect_type = $rel->{method} eq 'has_many' ? |
567 | 'inflect_plural' |
568 | : |
569 | 'inflect_singular'; |
570 | |
571 | my $inflect_method = "_$inflect_type"; |
572 | |
59388920 |
573 | my $relname_new_uninflected = $rel->{args}[0] . "_$rel_num"; |
dc379dc6 |
574 | |
575 | $rel_num++; |
576 | |
59388920 |
577 | my ($local_class, $local_moniker, $remote_moniker) |
578 | = @{ $rel->{extra} } |
579 | {qw/local_class local_moniker remote_moniker/}; |
dc379dc6 |
580 | |
581 | my @from_cols = apply { s/^self\.//i } |
582 | values %{ $rel->{args}[2] }; |
583 | |
59388920 |
584 | my @to_cols = apply { s/^foreign\.//i } |
585 | keys %{ $rel->{args}[2] }; |
586 | |
587 | my $to_class = $rel->{args}[1]; |
588 | |
589 | my ($relname_new, $inflect_mapped) = |
590 | $self->$inflect_method($relname_new_uninflected); |
591 | |
592 | my $rel_name_mapped; |
593 | |
594 | ($relname_new, $rel_name_mapped) = $self->_rel_name_map($relname_new, $rel->{method}, $local_class, $local_moniker, \@from_cols, $to_class, $remote_moniker, \@to_cols); |
595 | |
596 | my $mapped = $inflect_mapped || $rel_name_mapped; |
597 | |
598 | warn <<"EOF" unless $mapped; |
599 | Could not find a proper name for relationship '$relname_new' in source |
600 | '$local_moniker' for columns '@{[ join ',', @from_cols ]}'. Supply a value in |
601 | '$inflect_type' or 'rel_name_map' for '$relname_new_uninflected' to name this |
602 | relationship. |
dc379dc6 |
603 | EOF |
604 | |
59388920 |
605 | $relname_new = $self->_resolve_relname_collision($local_moniker, \@from_cols, $relname_new); |
aa608e1a |
606 | |
dc379dc6 |
607 | $rel->{args}[0] = $relname_new; |
608 | } |
609 | } |
610 | } |
996be9ee |
611 | } |
612 | |
39ef3bfe |
613 | sub _relnames_and_method { |
057fbb08 |
614 | my ( $self, $local_moniker, $rel, $cond, $uniqs, $counters ) = @_; |
e9c09ed9 |
615 | |
59388920 |
616 | my $remote_moniker = $rel->{remote_source}; |
617 | my $remote_obj = $self->schema->source( $remote_moniker ); |
618 | my $remote_class = $self->schema->class( $remote_moniker ); |
c4a69b87 |
619 | my $remote_relname = $self->_remote_relname( $rel->{remote_table}, $cond); |
fa6f8d4e |
620 | |
59388920 |
621 | my $local_cols = $rel->{local_columns}; |
c4a69b87 |
622 | my $local_table = $rel->{local_table}; |
59388920 |
623 | my $local_class = $self->schema->class($local_moniker); |
624 | my $local_source = $self->schema->source($local_moniker); |
057fbb08 |
625 | |
1ad8e8c3 |
626 | my $local_relname_uninflected = $self->_normalize_name($local_table); |
59388920 |
627 | my ($local_relname) = $self->_inflect_plural($self->_normalize_name($local_table)); |
fa6f8d4e |
628 | |
057fbb08 |
629 | my $remote_method = 'has_many'; |
630 | |
631 | # If the local columns have a UNIQUE constraint, this is a one-to-one rel |
ecf930e6 |
632 | if ($self->_array_eq([ $local_source->primary_columns ], $local_cols) || |
633 | grep { $self->_array_eq($_->[1], $local_cols) } @$uniqs) { |
59388920 |
634 | $remote_method = 'might_have'; |
635 | ($local_relname) = $self->_inflect_singular($local_relname_uninflected); |
057fbb08 |
636 | } |
fa6f8d4e |
637 | |
1ad8e8c3 |
638 | # If more than one rel between this pair of tables, use the local |
639 | # col names to distinguish, unless the rel was created previously. |
640 | if ($counters->{$remote_moniker} > 1) { |
641 | my $relationship_exists = 0; |
642 | |
404aefa4 |
643 | if (-f (my $existing_remote_file = $self->loader->get_dump_filename($remote_class))) { |
1ad8e8c3 |
644 | my $class = "${remote_class}Temporary"; |
645 | |
8c70d2c7 |
646 | if (not Class::Inspector->loaded($class)) { |
fcf328c7 |
647 | my $code = slurp_file $existing_remote_file; |
1ad8e8c3 |
648 | |
649 | $code =~ s/(?<=package $remote_class)/Temporary/g; |
650 | |
6e4b7bb1 |
651 | $code =~ s/__PACKAGE__->meta->make_immutable[^;]*;//g; |
1ad8e8c3 |
652 | |
653 | eval $code; |
654 | die $@ if $@; |
655 | |
656 | push @{ $self->_temp_classes }, $class; |
657 | } |
658 | |
659 | if ($class->has_relationship($local_relname)) { |
660 | my $rel_cols = [ sort { $a cmp $b } apply { s/^foreign\.//i } |
661 | (keys %{ $class->relationship_info($local_relname)->{cond} }) ]; |
662 | |
663 | $relationship_exists = 1 if $self->_array_eq([ sort @$local_cols ], $rel_cols); |
664 | } |
665 | } |
666 | |
667 | if (not $relationship_exists) { |
668 | my $colnames = q{_} . $self->_normalize_name(join '_', @$local_cols); |
669 | $remote_relname .= $colnames if keys %$cond > 1; |
670 | |
671 | $local_relname = $self->_normalize_name($local_table . $colnames); |
672 | $local_relname =~ s/_id$//; |
673 | |
674 | $local_relname_uninflected = $local_relname; |
59388920 |
675 | ($local_relname) = $self->_inflect_plural($local_relname); |
1ad8e8c3 |
676 | |
677 | # if colnames were added and this is a might_have, re-inflect |
678 | if ($remote_method eq 'might_have') { |
59388920 |
679 | ($local_relname) = $self->_inflect_singular($local_relname_uninflected); |
1ad8e8c3 |
680 | } |
681 | } |
682 | } |
683 | |
59388920 |
684 | return ($local_relname, $remote_relname, $remote_method); |
685 | } |
686 | |
687 | sub _rel_name_map { |
688 | my ($self, $relname, $method, $local_class, $local_moniker, $local_cols, |
689 | $remote_class, $remote_moniker, $remote_cols) = @_; |
690 | |
691 | my $info = { |
692 | name => $relname, |
693 | type => $method, |
694 | local_class => $local_class, |
695 | local_moniker => $local_moniker, |
696 | local_columns => $local_cols, |
697 | remote_class => $remote_class, |
698 | remote_moniker => $remote_moniker, |
699 | remote_columns => $remote_cols, |
700 | }; |
701 | |
702 | my $new_name = $relname; |
703 | |
704 | my $map = $self->rel_name_map; |
705 | my $mapped = 0; |
706 | |
707 | if ('HASH' eq ref($map)) { |
708 | my $name = $info->{name}; |
709 | my $moniker = $info->{local_moniker}; |
710 | if ($map->{$moniker} and 'HASH' eq ref($map->{$moniker}) |
711 | and $map->{$moniker}{$name} |
712 | ) { |
713 | $new_name = $map->{$moniker}{$name}; |
714 | $mapped = 1; |
715 | } |
716 | elsif ($map->{$name} and not 'HASH' eq ref($map->{$name})) { |
717 | $new_name = $map->{$name}; |
718 | $mapped = 1; |
719 | } |
720 | } |
721 | elsif ('CODE' eq ref($map)) { |
722 | my $name = $map->($info); |
723 | if ($name) { |
724 | $new_name = $name; |
725 | $mapped = 1; |
726 | } |
727 | } |
728 | |
729 | return ($new_name, $mapped); |
fa6f8d4e |
730 | } |
731 | |
dc379dc6 |
732 | sub _cleanup { |
1ad8e8c3 |
733 | my $self = shift; |
734 | |
735 | for my $class (@{ $self->_temp_classes }) { |
736 | Class::Unload->unload($class); |
737 | } |
738 | |
739 | $self->_temp_classes([]); |
740 | } |
741 | |
be80bba7 |
742 | =head1 AUTHOR |
743 | |
9cc8e7e1 |
744 | See L<DBIx::Class::Schema::Loader/AUTHOR> and L<DBIx::Class::Schema::Loader/CONTRIBUTORS>. |
be80bba7 |
745 | |
746 | =head1 LICENSE |
747 | |
748 | This library is free software; you can redistribute it and/or modify it under |
749 | the same terms as Perl itself. |
750 | |
751 | =cut |
752 | |
996be9ee |
753 | 1; |
19b7d71c |
754 | # vim:et sts=4 sw=4 tw=0: |