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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'; |
39b22ca9 |
9 | use Lingua::EN::Inflect::Phrase (); |
dc379dc6 |
10 | use Lingua::EN::Tagger (); |
cc4f11a2 |
11 | use DBIx::Class::Schema::Loader::Utils 'split_name'; |
dc96667a |
12 | use File::Slurp 'read_file'; |
1ad8e8c3 |
13 | use Try::Tiny; |
14 | use Class::Unload (); |
8c70d2c7 |
15 | use Class::Inspector (); |
1ad8e8c3 |
16 | use List::MoreUtils 'apply'; |
17 | use namespace::clean; |
996be9ee |
18 | |
4295c4b4 |
19 | our $VERSION = '0.07010'; |
32f784fc |
20 | |
6e4b7bb1 |
21 | # Glossary: |
22 | # |
23 | # remote_relname -- name of relationship from the local table referring to the remote table |
24 | # local_relname -- name of relationship from the remote table referring to the local table |
25 | # remote_method -- relationship type from remote table to local table, usually has_many |
26 | |
996be9ee |
27 | =head1 NAME |
28 | |
29 | DBIx::Class::Schema::Loader::RelBuilder - Builds relationships for DBIx::Class::Schema::Loader |
30 | |
31 | =head1 SYNOPSIS |
32 | |
19b7d71c |
33 | See L<DBIx::Class::Schema::Loader> and L<DBIx::Class::Schema::Loader::Base>. |
996be9ee |
34 | |
35 | =head1 DESCRIPTION |
36 | |
37 | This class builds relationships for L<DBIx::Class::Schema::Loader>. This |
38 | is module is not (yet) for external use. |
39 | |
40 | =head1 METHODS |
41 | |
42 | =head2 new |
43 | |
404aefa4 |
44 | Arguments: $loader object |
996be9ee |
45 | |
46 | =head2 generate_code |
47 | |
dc379dc6 |
48 | Arguments: |
49 | |
50 | { |
51 | local_moniker (scalar) => [ fk_info (arrayref), uniq_info (arrayref) ] |
52 | ... |
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 | { |
62 | local_columns => [ 'col2', 'col3' ], |
63 | remote_columns => [ 'col5', 'col7' ], |
64 | remote_moniker => 'AnotherTableMoniker', |
65 | }, |
66 | { |
67 | local_columns => [ 'col1', 'col4' ], |
68 | remote_columns => [ 'col1', 'col2' ], |
69 | remote_moniker => 'YetAnotherTableMoniker', |
70 | }, |
71 | # ... |
72 | ], |
73 | |
dc379dc6 |
74 | The uniq_info arrayref's contents should take the form: |
75 | |
76 | [ |
77 | [ |
78 | uniq_constraint_name => [ 'col1', 'col2' ], |
79 | ], |
80 | [ |
81 | another_uniq_constraint_name => [ 'col1', 'col2' ], |
82 | ], |
83 | ], |
84 | |
e8ad6491 |
85 | This method will return the generated relationships as a hashref keyed on the |
86 | class names. The values are arrayrefs of hashes containing method name and |
87 | arguments, like so: |
996be9ee |
88 | |
89 | { |
90 | 'Some::Source::Class' => [ |
b97c2c1e |
91 | { method => 'belongs_to', arguments => [ 'col1', 'Another::Source::Class' ], |
92 | { method => 'has_many', arguments => [ 'anothers', 'Yet::Another::Source::Class', 'col15' ], |
996be9ee |
93 | ], |
94 | 'Another::Source::Class' => [ |
95 | # ... |
96 | ], |
97 | # ... |
98 | } |
8f9d7ce5 |
99 | |
996be9ee |
100 | =cut |
101 | |
1ad8e8c3 |
102 | __PACKAGE__->mk_group_accessors('simple', qw/ |
404aefa4 |
103 | loader |
1ad8e8c3 |
104 | schema |
105 | inflect_plural |
106 | inflect_singular |
107 | relationship_attrs |
a7116285 |
108 | rel_collision_map |
59388920 |
109 | rel_name_map |
1ad8e8c3 |
110 | _temp_classes |
dc379dc6 |
111 | __tagger |
1ad8e8c3 |
112 | /); |
4c7b5f46 |
113 | |
996be9ee |
114 | sub new { |
404aefa4 |
115 | my ($class, $loader) = @_; |
4c7b5f46 |
116 | |
117 | # from old POD about this constructor: |
118 | # C<$schema_class> should be a schema class name, where the source |
119 | # classes have already been set up and registered. Column info, |
120 | # primary key, and unique constraints will be drawn from this |
121 | # schema for all of the existing source monikers. |
122 | |
123 | # Options inflect_plural and inflect_singular are optional, and |
124 | # are better documented in L<DBIx::Class::Schema::Loader::Base>. |
996be9ee |
125 | |
126 | my $self = { |
404aefa4 |
127 | loader => $loader, |
128 | schema => $loader->schema, |
129 | inflect_plural => $loader->inflect_plural, |
130 | inflect_singular => $loader->inflect_singular, |
131 | relationship_attrs => $loader->relationship_attrs, |
132 | rel_collision_map => $loader->rel_collision_map, |
133 | rel_name_map => $loader->rel_name_map, |
1ad8e8c3 |
134 | _temp_classes => [], |
996be9ee |
135 | }; |
136 | |
404aefa4 |
137 | weaken $self->{loader}; #< don't leak |
1ad8e8c3 |
138 | |
139 | bless $self => $class; |
4c7b5f46 |
140 | |
c8c27020 |
141 | # validate the relationship_attrs arg |
1ad8e8c3 |
142 | if( defined $self->relationship_attrs ) { |
143 | ref $self->relationship_attrs eq 'HASH' |
c8c27020 |
144 | or croak "relationship_attrs must be a hashref"; |
145 | } |
996be9ee |
146 | |
1ad8e8c3 |
147 | return $self; |
996be9ee |
148 | } |
149 | |
150 | |
151 | # pluralize a relationship name |
152 | sub _inflect_plural { |
ecf930e6 |
153 | my ($self, $relname) = @_; |
996be9ee |
154 | |
39ef3bfe |
155 | return '' if !defined $relname || $relname eq ''; |
156 | |
59388920 |
157 | my $result; |
158 | my $mapped = 0; |
159 | |
1ad8e8c3 |
160 | if( ref $self->inflect_plural eq 'HASH' ) { |
59388920 |
161 | if (exists $self->inflect_plural->{$relname}) { |
162 | $result = $self->inflect_plural->{$relname}; |
163 | $mapped = 1; |
164 | } |
996be9ee |
165 | } |
1ad8e8c3 |
166 | elsif( ref $self->inflect_plural eq 'CODE' ) { |
167 | my $inflected = $self->inflect_plural->($relname); |
59388920 |
168 | if ($inflected) { |
169 | $result = $inflected; |
170 | $mapped = 1; |
171 | } |
996be9ee |
172 | } |
173 | |
59388920 |
174 | return ($result, $mapped) if $mapped; |
175 | |
176 | return ($self->_to_PL($relname), 0); |
996be9ee |
177 | } |
178 | |
179 | # Singularize a relationship name |
180 | sub _inflect_singular { |
ecf930e6 |
181 | my ($self, $relname) = @_; |
996be9ee |
182 | |
39ef3bfe |
183 | return '' if !defined $relname || $relname eq ''; |
184 | |
59388920 |
185 | my $result; |
186 | my $mapped = 0; |
187 | |
1ad8e8c3 |
188 | if( ref $self->inflect_singular eq 'HASH' ) { |
59388920 |
189 | if (exists $self->inflect_singular->{$relname}) { |
190 | $result = $self->inflect_singular->{$relname}; |
191 | $mapped = 1; |
192 | } |
996be9ee |
193 | } |
1ad8e8c3 |
194 | elsif( ref $self->inflect_singular eq 'CODE' ) { |
195 | my $inflected = $self->inflect_singular->($relname); |
59388920 |
196 | if ($inflected) { |
197 | $result = $inflected; |
198 | $mapped = 1; |
199 | } |
996be9ee |
200 | } |
201 | |
59388920 |
202 | return ($result, $mapped) if $mapped; |
203 | |
204 | return ($self->_to_S($relname), 0); |
c496748b |
205 | } |
206 | |
207 | sub _to_PL { |
208 | my ($self, $name) = @_; |
209 | |
210 | $name =~ s/_/ /g; |
39b22ca9 |
211 | my $plural = Lingua::EN::Inflect::Phrase::to_PL($name); |
c496748b |
212 | $plural =~ s/ /_/g; |
213 | |
214 | return $plural; |
215 | } |
216 | |
c496748b |
217 | sub _to_S { |
218 | my ($self, $name) = @_; |
219 | |
39b22ca9 |
220 | $name =~ s/_/ /g; |
221 | my $singular = Lingua::EN::Inflect::Phrase::to_S($name); |
222 | $singular =~ s/ /_/g; |
223 | |
224 | return $singular; |
996be9ee |
225 | } |
226 | |
53ef681d |
227 | sub _default_relationship_attrs { +{ |
228 | has_many => { |
229 | cascade_delete => 0, |
230 | cascade_copy => 0, |
231 | }, |
232 | might_have => { |
233 | cascade_delete => 0, |
234 | cascade_copy => 0, |
235 | }, |
236 | belongs_to => { |
237 | on_delete => 'CASCADE', |
238 | on_update => 'CASCADE', |
aa0867ee |
239 | is_deferrable => 1, |
53ef681d |
240 | }, |
241 | } } |
242 | |
c8c27020 |
243 | # accessor for options to be passed to each generated relationship |
244 | # type. take single argument, the relationship type name, and returns |
245 | # either a hashref (if some options are set), or nothing |
246 | sub _relationship_attrs { |
247 | my ( $self, $reltype ) = @_; |
1ad8e8c3 |
248 | my $r = $self->relationship_attrs; |
c8c27020 |
249 | |
53ef681d |
250 | my %composite = ( |
251 | %{ $self->_default_relationship_attrs->{$reltype} || {} }, |
252 | %{ $r->{all} || {} } |
253 | ); |
254 | |
c8c27020 |
255 | if( my $specific = $r->{$reltype} ) { |
256 | while( my ($k,$v) = each %$specific ) { |
257 | $composite{$k} = $v; |
258 | } |
259 | } |
260 | return \%composite; |
261 | } |
262 | |
26f1c8c9 |
263 | sub _array_eq { |
ecf930e6 |
264 | my ($self, $a, $b) = @_; |
26f1c8c9 |
265 | |
266 | return unless @$a == @$b; |
267 | |
268 | for (my $i = 0; $i < @$a; $i++) { |
269 | return unless $a->[$i] eq $b->[$i]; |
270 | } |
271 | return 1; |
272 | } |
273 | |
c39e403e |
274 | sub _remote_attrs { |
c496748b |
275 | my ($self, $local_moniker, $local_cols) = @_; |
c39e403e |
276 | |
c496748b |
277 | # get our base set of attrs from _relationship_attrs, if present |
278 | my $attrs = $self->_relationship_attrs('belongs_to') || {}; |
c8c27020 |
279 | |
c496748b |
280 | # If the referring column is nullable, make 'belongs_to' an |
281 | # outer join, unless explicitly set by relationship_attrs |
1ad8e8c3 |
282 | my $nullable = grep { $self->schema->source($local_moniker)->column_info($_)->{is_nullable} } @$local_cols; |
c496748b |
283 | $attrs->{join_type} = 'LEFT' if $nullable && !defined $attrs->{join_type}; |
c39e403e |
284 | |
c496748b |
285 | return $attrs; |
c39e403e |
286 | } |
287 | |
414c61a0 |
288 | sub _sanitize_name { |
289 | my ($self, $name) = @_; |
290 | |
291 | if (ref $name) { |
292 | # scalar ref for weird table name (like one containing a '.') |
293 | ($name = $$name) =~ s/\W+/_/g; |
294 | } |
295 | else { |
296 | # remove 'schema.' prefix if any |
297 | $name =~ s/^[^.]+\.//; |
298 | } |
299 | |
300 | return $name; |
301 | } |
302 | |
19b7d71c |
303 | sub _normalize_name { |
304 | my ($self, $name) = @_; |
305 | |
414c61a0 |
306 | $name = $self->_sanitize_name($name); |
307 | |
cc4f11a2 |
308 | my @words = split_name $name; |
19b7d71c |
309 | |
310 | return join '_', map lc, @words; |
311 | } |
312 | |
f2fc8d01 |
313 | sub _remote_relname { |
314 | my ($self, $remote_table, $cond) = @_; |
315 | |
316 | my $remote_relname; |
317 | # for single-column case, set the remote relname to the column |
318 | # name, to make filter accessors work, but strip trailing _id |
319 | if(scalar keys %{$cond} == 1) { |
320 | my ($col) = values %{$cond}; |
19b7d71c |
321 | $col = $self->_normalize_name($col); |
f2fc8d01 |
322 | $col =~ s/_id$//; |
59388920 |
323 | ($remote_relname) = $self->_inflect_singular($col); |
f2fc8d01 |
324 | } |
325 | else { |
59388920 |
326 | ($remote_relname) = $self->_inflect_singular($self->_normalize_name($remote_table)); |
f2fc8d01 |
327 | } |
328 | |
329 | return $remote_relname; |
330 | } |
331 | |
a7116285 |
332 | sub _resolve_relname_collision { |
333 | my ($self, $moniker, $cols, $relname) = @_; |
334 | |
335 | return $relname if $relname eq 'id'; # this shouldn't happen, but just in case |
336 | |
404aefa4 |
337 | my $table = $self->loader->tables->{$moniker}; |
dc379dc6 |
338 | |
404aefa4 |
339 | if ($self->loader->_is_result_class_method($relname, $table)) { |
a7116285 |
340 | if (my $map = $self->rel_collision_map) { |
341 | for my $re (keys %$map) { |
342 | if (my @matches = $relname =~ /$re/) { |
343 | return sprintf $map->{$re}, @matches; |
344 | } |
345 | } |
346 | } |
347 | |
348 | my $new_relname = $relname; |
404aefa4 |
349 | while ($self->loader->_is_result_class_method($new_relname, $table)) { |
a7116285 |
350 | $new_relname .= '_rel' |
351 | } |
352 | |
353 | warn <<"EOF"; |
354 | Relationship '$relname' in source '$moniker' for columns '@{[ join ',', @$cols ]}' collides with an inherited method. |
355 | Renaming to '$new_relname'. |
356 | See "RELATIONSHIP NAME COLLISIONS" in perldoc DBIx::Class::Schema::Loader::Base . |
357 | EOF |
358 | |
359 | return $new_relname; |
360 | } |
361 | |
362 | return $relname; |
363 | } |
364 | |
996be9ee |
365 | sub generate_code { |
dc379dc6 |
366 | my ($self, $tables) = @_; |
367 | |
368 | # make a copy to destroy |
369 | my @tables = @$tables; |
996be9ee |
370 | |
371 | my $all_code = {}; |
372 | |
dc379dc6 |
373 | while (my ($local_moniker, $rels, $uniqs) = @{ shift @tables || [] }) { |
374 | my $local_class = $self->schema->class($local_moniker); |
057fbb08 |
375 | |
dc379dc6 |
376 | my %counters; |
377 | foreach my $rel (@$rels) { |
378 | next if !$rel->{remote_source}; |
379 | $counters{$rel->{remote_source}}++; |
380 | } |
e8ad6491 |
381 | |
dc379dc6 |
382 | foreach my $rel (@$rels) { |
383 | my $remote_moniker = $rel->{remote_source} |
384 | or next; |
057fbb08 |
385 | |
dc379dc6 |
386 | my $remote_class = $self->schema->class($remote_moniker); |
387 | my $remote_obj = $self->schema->source($remote_moniker); |
388 | my $remote_cols = $rel->{remote_columns} || [ $remote_obj->primary_columns ]; |
057fbb08 |
389 | |
dc379dc6 |
390 | my $local_cols = $rel->{local_columns}; |
e8ad6491 |
391 | |
dc379dc6 |
392 | if($#$local_cols != $#$remote_cols) { |
393 | croak "Column count mismatch: $local_moniker (@$local_cols) " |
394 | . "$remote_moniker (@$remote_cols)"; |
395 | } |
996be9ee |
396 | |
dc379dc6 |
397 | my %cond; |
398 | foreach my $i (0 .. $#$local_cols) { |
399 | $cond{$remote_cols->[$i]} = $local_cols->[$i]; |
400 | } |
401 | |
402 | my ( $local_relname, $remote_relname, $remote_method ) = |
403 | $self->_relnames_and_method( $local_moniker, $rel, \%cond, $uniqs, \%counters ); |
59388920 |
404 | my $local_method = 'belongs_to'; |
405 | |
406 | ($remote_relname) = $self->_rel_name_map($remote_relname, $local_method, $local_class, $local_moniker, $local_cols, $remote_class, $remote_moniker, $remote_cols); |
407 | ($local_relname) = $self->_rel_name_map($local_relname, $remote_method, $remote_class, $remote_moniker, $remote_cols, $local_class, $local_moniker, $local_cols); |
dc379dc6 |
408 | |
59388920 |
409 | $remote_relname = $self->_resolve_relname_collision($local_moniker, $local_cols, $remote_relname); |
410 | $local_relname = $self->_resolve_relname_collision($remote_moniker, $remote_cols, $local_relname); |
dc379dc6 |
411 | |
412 | push(@{$all_code->{$local_class}}, |
59388920 |
413 | { method => $local_method, |
dc379dc6 |
414 | args => [ $remote_relname, |
415 | $remote_class, |
416 | \%cond, |
417 | $self->_remote_attrs($local_moniker, $local_cols), |
418 | ], |
419 | extra => { |
59388920 |
420 | local_class => $local_class, |
421 | local_moniker => $local_moniker, |
422 | remote_moniker => $remote_moniker, |
dc379dc6 |
423 | }, |
424 | } |
425 | ); |
426 | |
427 | my %rev_cond = reverse %cond; |
428 | for (keys %rev_cond) { |
429 | $rev_cond{"foreign.$_"} = "self.".$rev_cond{$_}; |
430 | delete $rev_cond{$_}; |
431 | } |
432 | |
433 | push(@{$all_code->{$remote_class}}, |
434 | { method => $remote_method, |
435 | args => [ $local_relname, |
436 | $local_class, |
437 | \%rev_cond, |
438 | $self->_relationship_attrs($remote_method), |
439 | ], |
440 | extra => { |
59388920 |
441 | local_class => $remote_class, |
442 | local_moniker => $remote_moniker, |
443 | remote_moniker => $local_moniker, |
dc379dc6 |
444 | }, |
445 | } |
446 | ); |
e8ad6491 |
447 | } |
dc379dc6 |
448 | } |
449 | |
450 | # disambiguate rels with the same name |
451 | foreach my $class (keys %$all_code) { |
452 | my $dups = $self->_duplicates($all_code->{$class}); |
996be9ee |
453 | |
dc379dc6 |
454 | $self->_disambiguate($all_code->{$class}, $dups) if $dups; |
455 | } |
456 | |
457 | $self->_cleanup; |
458 | |
459 | return $all_code; |
460 | } |
461 | |
462 | sub _duplicates { |
463 | my ($self, $rels) = @_; |
464 | |
465 | my @rels = map [ $_->{args}[0] => $_ ], @$rels; |
466 | my %rel_names; |
467 | $rel_names{$_}++ foreach map $_->[0], @rels; |
468 | |
469 | my @dups = grep $rel_names{$_} > 1, keys %rel_names; |
470 | |
471 | my %dups; |
472 | |
473 | foreach my $dup (@dups) { |
474 | $dups{$dup} = [ map $_->[1], grep { $_->[0] eq $dup } @rels ]; |
475 | } |
476 | |
477 | return if not %dups; |
478 | |
479 | return \%dups; |
480 | } |
481 | |
482 | sub _tagger { |
483 | my $self = shift; |
484 | |
485 | $self->__tagger(Lingua::EN::Tagger->new) unless $self->__tagger; |
486 | |
487 | return $self->__tagger; |
488 | } |
7dba7c70 |
489 | |
dc379dc6 |
490 | sub _adjectives { |
491 | my ($self, @cols) = @_; |
a7116285 |
492 | |
dc379dc6 |
493 | my @adjectives; |
494 | |
495 | foreach my $col (@cols) { |
496 | my @words = split_name $col; |
497 | |
498 | my $tagged = $self->_tagger->get_readable(join ' ', @words); |
499 | |
500 | push @adjectives, $tagged =~ m{\G(\w+)/JJ\s+}g; |
501 | } |
502 | |
503 | return @adjectives; |
504 | } |
505 | |
506 | sub _disambiguate { |
507 | my ($self, $all_rels, $dups) = @_; |
508 | |
509 | foreach my $dup (keys %$dups) { |
510 | my @rels = @{ $dups->{$dup} }; |
511 | |
512 | foreach my $rel (@rels) { |
513 | next if $rel->{method} eq 'belongs_to'; |
514 | |
515 | my @to_cols = apply { s/^foreign\.//i } |
516 | keys %{ $rel->{args}[2] }; |
517 | |
518 | my @adjectives = $self->_adjectives(@to_cols); |
519 | |
520 | # If there are no adjectives, and there is only one might_have |
521 | # rel to that class, we hardcode 'active'. |
522 | |
523 | my $to_class = $rel->{args}[1]; |
524 | |
525 | if ((not @adjectives) |
526 | && (grep { $_->{method} eq 'might_have' |
527 | && $_->{args}[1] eq $to_class } @$all_rels) == 1) { |
528 | |
529 | @adjectives = 'active'; |
996be9ee |
530 | } |
e8ad6491 |
531 | |
dc379dc6 |
532 | if (@adjectives) { |
533 | my $rel_name = join '_', sort(@adjectives), $rel->{args}[0]; |
534 | |
59388920 |
535 | ($rel_name) = $rel->{method} eq 'might_have' ? |
dc379dc6 |
536 | $self->_inflect_singular($rel_name) |
537 | : |
538 | $self->_inflect_plural($rel_name); |
539 | |
59388920 |
540 | my ($local_class, $local_moniker, $remote_moniker) |
541 | = @{ $rel->{extra} } |
542 | {qw/local_class local_moniker remote_moniker/}; |
dc379dc6 |
543 | |
544 | my @from_cols = apply { s/^self\.//i } |
545 | values %{ $rel->{args}[2] }; |
057fbb08 |
546 | |
59388920 |
547 | ($rel_name) = $self->_rel_name_map($rel_name, $rel->{method}, $local_class, $local_moniker, \@from_cols, $to_class, $remote_moniker, \@to_cols); |
548 | |
549 | $rel_name = $self->_resolve_relname_collision($local_moniker, \@from_cols, $rel_name); |
dc379dc6 |
550 | |
551 | $rel->{args}[0] = $rel_name; |
e8ad6491 |
552 | } |
dc379dc6 |
553 | } |
996be9ee |
554 | } |
555 | |
dc379dc6 |
556 | # Check again for duplicates, since the heuristics above may not have resolved them all. |
557 | |
558 | if ($dups = $self->_duplicates($all_rels)) { |
559 | foreach my $dup (keys %$dups) { |
560 | # sort by method |
561 | my @rels = map $_->[1], sort { $a->[0] <=> $b->[0] } map [ |
562 | ($_->{method} eq 'belongs_to' ? 3 : $_->{method} eq 'has_many' ? 2 : 1), $_ |
563 | ], @{ $dups->{$dup} }; |
564 | |
565 | my $rel_num = 2; |
566 | |
567 | foreach my $rel (@rels[1 .. $#rels]) { |
568 | my $inflect_type = $rel->{method} eq 'has_many' ? |
569 | 'inflect_plural' |
570 | : |
571 | 'inflect_singular'; |
572 | |
573 | my $inflect_method = "_$inflect_type"; |
574 | |
59388920 |
575 | my $relname_new_uninflected = $rel->{args}[0] . "_$rel_num"; |
dc379dc6 |
576 | |
577 | $rel_num++; |
578 | |
59388920 |
579 | my ($local_class, $local_moniker, $remote_moniker) |
580 | = @{ $rel->{extra} } |
581 | {qw/local_class local_moniker remote_moniker/}; |
dc379dc6 |
582 | |
583 | my @from_cols = apply { s/^self\.//i } |
584 | values %{ $rel->{args}[2] }; |
585 | |
59388920 |
586 | my @to_cols = apply { s/^foreign\.//i } |
587 | keys %{ $rel->{args}[2] }; |
588 | |
589 | my $to_class = $rel->{args}[1]; |
590 | |
591 | my ($relname_new, $inflect_mapped) = |
592 | $self->$inflect_method($relname_new_uninflected); |
593 | |
594 | my $rel_name_mapped; |
595 | |
596 | ($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); |
597 | |
598 | my $mapped = $inflect_mapped || $rel_name_mapped; |
599 | |
600 | warn <<"EOF" unless $mapped; |
601 | Could not find a proper name for relationship '$relname_new' in source |
602 | '$local_moniker' for columns '@{[ join ',', @from_cols ]}'. Supply a value in |
603 | '$inflect_type' or 'rel_name_map' for '$relname_new_uninflected' to name this |
604 | relationship. |
dc379dc6 |
605 | EOF |
606 | |
59388920 |
607 | $relname_new = $self->_resolve_relname_collision($local_moniker, \@from_cols, $relname_new); |
aa608e1a |
608 | |
dc379dc6 |
609 | $rel->{args}[0] = $relname_new; |
610 | } |
611 | } |
612 | } |
996be9ee |
613 | } |
614 | |
39ef3bfe |
615 | sub _relnames_and_method { |
057fbb08 |
616 | my ( $self, $local_moniker, $rel, $cond, $uniqs, $counters ) = @_; |
e9c09ed9 |
617 | |
59388920 |
618 | my $remote_moniker = $rel->{remote_source}; |
619 | my $remote_obj = $self->schema->source( $remote_moniker ); |
620 | my $remote_class = $self->schema->class( $remote_moniker ); |
621 | my $remote_relname = $self->_remote_relname( $remote_obj->from, $cond); |
fa6f8d4e |
622 | |
59388920 |
623 | my $local_cols = $rel->{local_columns}; |
624 | my $local_table = $self->schema->source($local_moniker)->from; |
625 | my $local_class = $self->schema->class($local_moniker); |
626 | my $local_source = $self->schema->source($local_moniker); |
057fbb08 |
627 | |
1ad8e8c3 |
628 | my $local_relname_uninflected = $self->_normalize_name($local_table); |
59388920 |
629 | my ($local_relname) = $self->_inflect_plural($self->_normalize_name($local_table)); |
fa6f8d4e |
630 | |
057fbb08 |
631 | my $remote_method = 'has_many'; |
632 | |
633 | # If the local columns have a UNIQUE constraint, this is a one-to-one rel |
ecf930e6 |
634 | if ($self->_array_eq([ $local_source->primary_columns ], $local_cols) || |
635 | grep { $self->_array_eq($_->[1], $local_cols) } @$uniqs) { |
59388920 |
636 | $remote_method = 'might_have'; |
637 | ($local_relname) = $self->_inflect_singular($local_relname_uninflected); |
057fbb08 |
638 | } |
fa6f8d4e |
639 | |
1ad8e8c3 |
640 | # If more than one rel between this pair of tables, use the local |
641 | # col names to distinguish, unless the rel was created previously. |
642 | if ($counters->{$remote_moniker} > 1) { |
643 | my $relationship_exists = 0; |
644 | |
404aefa4 |
645 | if (-f (my $existing_remote_file = $self->loader->get_dump_filename($remote_class))) { |
1ad8e8c3 |
646 | my $class = "${remote_class}Temporary"; |
647 | |
8c70d2c7 |
648 | if (not Class::Inspector->loaded($class)) { |
dc96667a |
649 | my $code = read_file($existing_remote_file, binmode => ':encoding(UTF-8)'); |
1ad8e8c3 |
650 | |
651 | $code =~ s/(?<=package $remote_class)/Temporary/g; |
652 | |
6e4b7bb1 |
653 | $code =~ s/__PACKAGE__->meta->make_immutable[^;]*;//g; |
1ad8e8c3 |
654 | |
655 | eval $code; |
656 | die $@ if $@; |
657 | |
658 | push @{ $self->_temp_classes }, $class; |
659 | } |
660 | |
661 | if ($class->has_relationship($local_relname)) { |
662 | my $rel_cols = [ sort { $a cmp $b } apply { s/^foreign\.//i } |
663 | (keys %{ $class->relationship_info($local_relname)->{cond} }) ]; |
664 | |
665 | $relationship_exists = 1 if $self->_array_eq([ sort @$local_cols ], $rel_cols); |
666 | } |
667 | } |
668 | |
669 | if (not $relationship_exists) { |
670 | my $colnames = q{_} . $self->_normalize_name(join '_', @$local_cols); |
671 | $remote_relname .= $colnames if keys %$cond > 1; |
672 | |
673 | $local_relname = $self->_normalize_name($local_table . $colnames); |
674 | $local_relname =~ s/_id$//; |
675 | |
676 | $local_relname_uninflected = $local_relname; |
59388920 |
677 | ($local_relname) = $self->_inflect_plural($local_relname); |
1ad8e8c3 |
678 | |
679 | # if colnames were added and this is a might_have, re-inflect |
680 | if ($remote_method eq 'might_have') { |
59388920 |
681 | ($local_relname) = $self->_inflect_singular($local_relname_uninflected); |
1ad8e8c3 |
682 | } |
683 | } |
684 | } |
685 | |
59388920 |
686 | return ($local_relname, $remote_relname, $remote_method); |
687 | } |
688 | |
689 | sub _rel_name_map { |
690 | my ($self, $relname, $method, $local_class, $local_moniker, $local_cols, |
691 | $remote_class, $remote_moniker, $remote_cols) = @_; |
692 | |
693 | my $info = { |
694 | name => $relname, |
695 | type => $method, |
696 | local_class => $local_class, |
697 | local_moniker => $local_moniker, |
698 | local_columns => $local_cols, |
699 | remote_class => $remote_class, |
700 | remote_moniker => $remote_moniker, |
701 | remote_columns => $remote_cols, |
702 | }; |
703 | |
704 | my $new_name = $relname; |
705 | |
706 | my $map = $self->rel_name_map; |
707 | my $mapped = 0; |
708 | |
709 | if ('HASH' eq ref($map)) { |
710 | my $name = $info->{name}; |
711 | my $moniker = $info->{local_moniker}; |
712 | if ($map->{$moniker} and 'HASH' eq ref($map->{$moniker}) |
713 | and $map->{$moniker}{$name} |
714 | ) { |
715 | $new_name = $map->{$moniker}{$name}; |
716 | $mapped = 1; |
717 | } |
718 | elsif ($map->{$name} and not 'HASH' eq ref($map->{$name})) { |
719 | $new_name = $map->{$name}; |
720 | $mapped = 1; |
721 | } |
722 | } |
723 | elsif ('CODE' eq ref($map)) { |
724 | my $name = $map->($info); |
725 | if ($name) { |
726 | $new_name = $name; |
727 | $mapped = 1; |
728 | } |
729 | } |
730 | |
731 | return ($new_name, $mapped); |
fa6f8d4e |
732 | } |
733 | |
dc379dc6 |
734 | sub _cleanup { |
1ad8e8c3 |
735 | my $self = shift; |
736 | |
737 | for my $class (@{ $self->_temp_classes }) { |
738 | Class::Unload->unload($class); |
739 | } |
740 | |
741 | $self->_temp_classes([]); |
742 | } |
743 | |
be80bba7 |
744 | =head1 AUTHOR |
745 | |
9cc8e7e1 |
746 | See L<DBIx::Class::Schema::Loader/AUTHOR> and L<DBIx::Class::Schema::Loader/CONTRIBUTORS>. |
be80bba7 |
747 | |
748 | =head1 LICENSE |
749 | |
750 | This library is free software; you can redistribute it and/or modify it under |
751 | the same terms as Perl itself. |
752 | |
753 | =cut |
754 | |
996be9ee |
755 | 1; |
19b7d71c |
756 | # vim:et sts=4 sw=4 tw=0: |