1 package DBIx::Class::Schema::Loader::RelBuilder;
5 use base 'Class::Accessor::Grouped';
7 use Carp::Clan qw/^DBIx::Class/;
8 use Scalar::Util 'weaken';
9 use DBIx::Class::Schema::Loader::Utils qw/split_name slurp_file array_eq/;
11 use List::Util 'first';
12 use List::MoreUtils qw/apply uniq any none/;
14 use Lingua::EN::Inflect::Phrase ();
15 use Lingua::EN::Tagger ();
16 use String::ToIdentifier::EN ();
17 use String::ToIdentifier::EN::Unicode ();
19 use Class::Inspector ();
21 our $VERSION = '0.07038';
25 # local_relname -- name of relationship from the local table referring to the remote table
26 # remote_relname -- name of relationship from the remote table referring to the local table
27 # remote_method -- relationship type from remote table to local table, usually has_many
31 DBIx::Class::Schema::Loader::RelBuilder - Builds relationships for DBIx::Class::Schema::Loader
35 See L<DBIx::Class::Schema::Loader> and L<DBIx::Class::Schema::Loader::Base>.
39 This class builds relationships for L<DBIx::Class::Schema::Loader>. This
40 is module is not (yet) for external use.
46 Arguments: $loader object
53 [ local_moniker1 (scalar), fk_info1 (arrayref), uniq_info1 (arrayref) ]
54 [ local_moniker2 (scalar), fk_info2 (arrayref), uniq_info2 (arrayref) ]
58 This generates the code for the relationships of each table.
60 C<local_moniker> is the moniker name of the table which had the REFERENCES
61 statements. The fk_info arrayref's contents should take the form:
65 local_table => 'some_table',
66 local_moniker => 'SomeTable',
67 local_columns => [ 'col2', 'col3' ],
68 remote_table => 'another_table_moniker',
69 remote_moniker => 'AnotherTableMoniker',
70 remote_columns => [ 'col5', 'col7' ],
73 local_table => 'some_other_table',
74 local_moniker => 'SomeOtherTable',
75 local_columns => [ 'col1', 'col4' ],
76 remote_table => 'yet_another_table_moniker',
77 remote_moniker => 'YetAnotherTableMoniker',
78 remote_columns => [ 'col1', 'col2' ],
83 The uniq_info arrayref's contents should take the form:
87 uniq_constraint_name => [ 'col1', 'col2' ],
90 another_uniq_constraint_name => [ 'col1', 'col2' ],
94 This method will return the generated relationships as a hashref keyed on the
95 class names. The values are arrayrefs of hashes containing method name and
99 'Some::Source::Class' => [
100 { method => 'belongs_to', arguments => [ 'col1', 'Another::Source::Class' ],
101 { method => 'has_many', arguments => [ 'anothers', 'Yet::Another::Source::Class', 'col15' ],
103 'Another::Source::Class' => [
111 __PACKAGE__->mk_group_accessors('simple', qw/
124 my ($class, $loader) = @_;
126 # from old POD about this constructor:
127 # C<$schema_class> should be a schema class name, where the source
128 # classes have already been set up and registered. Column info,
129 # primary key, and unique constraints will be drawn from this
130 # schema for all of the existing source monikers.
132 # Options inflect_plural and inflect_singular are optional, and
133 # are better documented in L<DBIx::Class::Schema::Loader::Base>.
137 schema => $loader->schema,
138 inflect_plural => $loader->inflect_plural,
139 inflect_singular => $loader->inflect_singular,
140 relationship_attrs => $loader->relationship_attrs,
141 rel_collision_map => $loader->rel_collision_map,
142 rel_name_map => $loader->rel_name_map,
146 weaken $self->{loader}; #< don't leak
148 bless $self => $class;
150 # validate the relationship_attrs arg
151 if( defined $self->relationship_attrs ) {
152 (ref $self->relationship_attrs eq 'HASH' || ref $self->relationship_attrs eq 'CODE')
153 or croak "relationship_attrs must be a hashref or coderef";
160 # pluralize a relationship name
161 sub _inflect_plural {
162 my ($self, $relname) = @_;
164 return '' if !defined $relname || $relname eq '';
169 if( ref $self->inflect_plural eq 'HASH' ) {
170 if (exists $self->inflect_plural->{$relname}) {
171 $result = $self->inflect_plural->{$relname};
175 elsif( ref $self->inflect_plural eq 'CODE' ) {
176 my $inflected = $self->inflect_plural->($relname);
178 $result = $inflected;
183 return ($result, $mapped) if $mapped;
185 return ($self->_to_PL($relname), 0);
188 # Singularize a relationship name
189 sub _inflect_singular {
190 my ($self, $relname) = @_;
192 return '' if !defined $relname || $relname eq '';
197 if( ref $self->inflect_singular eq 'HASH' ) {
198 if (exists $self->inflect_singular->{$relname}) {
199 $result = $self->inflect_singular->{$relname};
203 elsif( ref $self->inflect_singular eq 'CODE' ) {
204 my $inflected = $self->inflect_singular->($relname);
206 $result = $inflected;
211 return ($result, $mapped) if $mapped;
213 return ($self->_to_S($relname), 0);
217 my ($self, $name) = @_;
220 my $plural = Lingua::EN::Inflect::Phrase::to_PL($name);
227 my ($self, $name) = @_;
230 my $singular = Lingua::EN::Inflect::Phrase::to_S($name);
231 $singular =~ s/ /_/g;
236 sub _default_relationship_attrs { +{
246 on_delete => 'CASCADE',
247 on_update => 'CASCADE',
252 # Accessor for options to be passed to each generated relationship type. takes
253 # the relationship type name and optionally any attributes from the database
254 # (such as FK ON DELETE/UPDATE and DEFERRABLE clauses), and returns a
255 # hashref or undef if nothing is set.
257 # The attributes from the database override the default attributes, which in
258 # turn are overridden by user supplied attributes.
259 sub _relationship_attrs {
260 my ( $self, $reltype, $db_attrs, $params ) = @_;
261 my $r = $self->relationship_attrs;
264 %{ $self->_default_relationship_attrs->{$reltype} || {} },
265 %{ $db_attrs || {} },
268 %{ $r->{all} || {} },
269 %{ $r->{$reltype} || {} },
276 if (ref $r eq 'CODE') {
277 $params->{attrs} = \%composite;
279 my %ret = %{ $r->(%$params) || {} };
281 %composite = %ret if %ret;
284 return %composite ? \%composite : undef;
287 sub _strip_id_postfix {
288 my ($self, $name) = @_;
290 $name =~ s/_?(?:id|ref|cd|code|num)\z//i;
296 my ($self, $local_moniker, $local_cols, $fk_attrs, $params) = @_;
298 # get our set of attrs from _relationship_attrs, which uses the FK attrs if available
299 my $attrs = $self->_relationship_attrs('belongs_to', $fk_attrs, $params) || {};
301 # If any referring column is nullable, make 'belongs_to' an
302 # outer join, unless explicitly set by relationship_attrs
303 my $nullable = first { $self->schema->source($local_moniker)->column_info($_)->{is_nullable} } @$local_cols;
304 $attrs->{join_type} = 'LEFT' if $nullable && !defined $attrs->{join_type};
310 my ($self, $name) = @_;
312 $name = $self->loader->_to_identifier('relationships', $name, '_');
314 $name =~ s/\W+/_/g; # if naming >= 8 to_identifier takes care of it
319 sub _normalize_name {
320 my ($self, $name) = @_;
322 $name = $self->_sanitize_name($name);
324 my @words = split_name $name, $self->loader->_get_naming_v('relationships');
326 return join '_', map lc, @words;
330 my ($self, $remote_table, $cond) = @_;
333 # for single-column case, set the remote relname to the column
334 # name, to make filter accessors work, but strip trailing _id
335 if(scalar keys %{$cond} == 1) {
336 my ($col) = values %{$cond};
337 $col = $self->_strip_id_postfix($self->_normalize_name($col));
338 ($local_relname) = $self->_inflect_singular($col);
341 ($local_relname) = $self->_inflect_singular($self->_normalize_name($remote_table));
344 return $local_relname;
347 sub _resolve_relname_collision {
348 my ($self, $moniker, $cols, $relname) = @_;
350 return $relname if $relname eq 'id'; # this shouldn't happen, but just in case
352 my $table = $self->loader->moniker_to_table->{$moniker};
354 if ($self->loader->_is_result_class_method($relname, $table)) {
355 if (my $map = $self->rel_collision_map) {
356 for my $re (keys %$map) {
357 if (my @matches = $relname =~ /$re/) {
358 return sprintf $map->{$re}, @matches;
363 my $new_relname = $relname;
364 while ($self->loader->_is_result_class_method($new_relname, $table)) {
365 $new_relname .= '_rel'
369 Relationship '$relname' in source '$moniker' for columns '@{[ join ',', @$cols ]}' collides with an inherited method. Renaming to '$new_relname'.
370 See "RELATIONSHIP NAME COLLISIONS" in perldoc DBIx::Class::Schema::Loader::Base .
380 my ($self, $tables) = @_;
382 # make a copy to destroy
383 my @tables = @$tables;
384 my %uniq_cols = map { $_->[0] => [ map { $_->[1] } @{$_->[2]} ] } @tables;
388 while (my ($local_moniker, $rels, $uniqs) = @{ shift @tables || [] }) {
389 my $local_class = $self->schema->class($local_moniker);
392 foreach my $rel (@$rels) {
393 next if !$rel->{remote_source};
394 $counters{$rel->{remote_source}}++;
397 foreach my $rel (@$rels) {
398 my $remote_moniker = $rel->{remote_source}
401 my $remote_class = $self->schema->class($remote_moniker);
402 my $remote_obj = $self->schema->source($remote_moniker);
403 my $remote_cols = $rel->{remote_columns} || [ $remote_obj->primary_columns ];
405 my $local_cols = $rel->{local_columns};
407 if($#$local_cols != $#$remote_cols) {
408 croak "Column count mismatch: $local_moniker (@$local_cols) "
409 . "$remote_moniker (@$remote_cols)";
413 @cond{@$remote_cols} = @$local_cols;
415 my ( $local_relname, $remote_relname, $remote_method ) =
416 $self->_relnames_and_method( $local_moniker, $rel, \%cond, $uniqs, \%counters );
417 my $local_method = 'belongs_to';
419 ($local_relname) = $self->_rel_name_map(
420 $local_relname, $local_method,
421 $local_class, $local_moniker, $local_cols,
422 $remote_class, $remote_moniker, $remote_cols,
424 ($remote_relname) = $self->_rel_name_map(
425 $remote_relname, $remote_method,
426 $remote_class, $remote_moniker, $remote_cols,
427 $local_class, $local_moniker, $local_cols,
430 $local_relname = $self->_resolve_relname_collision(
431 $local_moniker, $local_cols, $local_relname,
433 $remote_relname = $self->_resolve_relname_collision(
434 $remote_moniker, $remote_cols, $remote_relname,
437 if (!$self->loader->_disable_uniq_detection
438 && none { array_eq($_, $remote_cols) }
439 [ $remote_obj->primary_columns ],
440 @{$uniq_cols{$remote_moniker}},
443 $local_method relationship '$remote_relname' in source '$local_moniker' references
444 non-unique columns (@{[join(',', @$remote_cols)]}) in source '$remote_moniker'.
448 my $rel_attrs_params = {
449 rel_name => $local_relname,
450 rel_type => $local_method,
451 local_source => $self->schema->source($local_moniker),
452 remote_source => $self->schema->source($remote_moniker),
453 local_table => $rel->{local_table},
454 local_cols => $local_cols,
455 remote_table => $rel->{remote_table},
456 remote_cols => $remote_cols,
459 push @{$all_code->{$local_class}}, {
460 method => $local_method,
465 $self->_remote_attrs($local_moniker, $local_cols, $rel->{attrs}, $rel_attrs_params),
468 local_class => $local_class,
469 local_moniker => $local_moniker,
470 remote_moniker => $remote_moniker,
474 my %rev_cond = reverse %cond;
475 for (keys %rev_cond) {
476 $rev_cond{"foreign.$_"} = "self.".$rev_cond{$_};
477 delete $rev_cond{$_};
480 $rel_attrs_params = {
481 rel_name => $remote_relname,
482 rel_type => $remote_method,
483 local_source => $self->schema->source($remote_moniker),
484 remote_source => $self->schema->source($local_moniker),
485 local_table => $rel->{remote_table},
486 local_cols => $remote_cols,
487 remote_table => $rel->{local_table},
488 remote_cols => $local_cols,
491 push @{$all_code->{$remote_class}}, {
492 method => $remote_method,
497 $self->_relationship_attrs($remote_method, {}, $rel_attrs_params),
500 local_class => $remote_class,
501 local_moniker => $remote_moniker,
502 remote_moniker => $local_moniker,
508 $self->_generate_m2ms($all_code);
510 # disambiguate rels with the same name
511 foreach my $class (keys %$all_code) {
512 my $dups = $self->_duplicates($all_code->{$class});
514 $self->_disambiguate($all_code, $class, $dups) if $dups;
522 # Find classes with only 2 FKs which are the PK and make many_to_many bridges for them.
524 my ($self, $all_code) = @_;
526 while (my ($class, $rels) = each %$all_code) {
527 next unless (grep $_->{method} eq 'belongs_to', @$rels) == 2;
529 my $class1_local_moniker = $rels->[0]{extra}{remote_moniker};
530 my $class1_remote_moniker = $rels->[1]{extra}{remote_moniker};
532 my $class2_local_moniker = $rels->[1]{extra}{remote_moniker};
533 my $class2_remote_moniker = $rels->[0]{extra}{remote_moniker};
535 my $class1 = $rels->[0]{args}[1];
536 my $class2 = $rels->[1]{args}[1];
538 my $class1_to_link_table_rel = first {
539 $_->{method} eq 'has_many' && $_->{args}[1] eq $class
540 } @{ $all_code->{$class1} };
542 next unless $class1_to_link_table_rel;
544 my $class1_to_link_table_rel_name = $class1_to_link_table_rel->{args}[0];
546 my $class2_to_link_table_rel = first {
547 $_->{method} eq 'has_many' && $_->{args}[1] eq $class
548 } @{ $all_code->{$class2} };
550 next unless $class2_to_link_table_rel;
552 my $class2_to_link_table_rel_name = $class2_to_link_table_rel->{args}[0];
554 my $class1_link_rel = $rels->[1]{args}[0];
555 my $class2_link_rel = $rels->[0]{args}[0];
557 my @class1_from_cols = apply { s/^self\.//i } values %{
558 $class1_to_link_table_rel->{args}[2]
561 my @class1_link_cols = apply { s/^self\.//i } values %{ $rels->[1]{args}[2] };
563 my @class1_to_cols = apply { s/^foreign\.//i } keys %{ $rels->[1]{args}[2] };
565 my @class2_from_cols = apply { s/^self\.//i } values %{
566 $class2_to_link_table_rel->{args}[2]
569 my @class2_link_cols = apply { s/^self\.//i } values %{ $rels->[0]{args}[2] };
571 my @class2_to_cols = apply { s/^foreign\.//i } keys %{ $rels->[0]{args}[2] };
573 my $link_moniker = $rels->[0]{extra}{local_moniker};
575 my @link_table_cols =
576 @{[ $self->schema->source($link_moniker)->columns ]};
578 my @link_table_primary_cols =
579 @{[ $self->schema->source($link_moniker)->primary_columns ]};
581 next unless @class1_link_cols + @class2_link_cols == @link_table_cols
582 && @link_table_cols == @link_table_primary_cols;
584 my ($class1_to_class2_relname) = $self->_rel_name_map(
585 ($self->_inflect_plural($class1_link_rel))[0],
588 $class1_local_moniker,
591 $class1_remote_moniker,
594 link_class => $class,
595 link_moniker => $link_moniker,
596 link_rel_name => $class1_to_link_table_rel_name,
600 $class1_to_class2_relname = $self->_resolve_relname_collision(
601 $class1_local_moniker,
603 $class1_to_class2_relname,
606 my ($class2_to_class1_relname) = $self->_rel_name_map(
607 ($self->_inflect_plural($class2_link_rel))[0],
610 $class2_local_moniker,
613 $class2_remote_moniker,
616 link_class => $class,
617 link_moniker => $link_moniker,
618 link_rel_name => $class2_to_link_table_rel_name,
622 $class2_to_class1_relname = $self->_resolve_relname_collision(
623 $class2_local_moniker,
625 $class2_to_class1_relname,
628 push @{$all_code->{$class1}}, {
629 method => 'many_to_many',
631 $class1_to_class2_relname,
632 $class1_to_link_table_rel_name,
634 $self->_relationship_attrs('many_to_many', {}, {
635 rel_type => 'many_to_many',
636 rel_name => $class1_to_class2_relname,
637 local_source => $self->schema->source($class1_local_moniker),
638 remote_source => $self->schema->source($class1_remote_moniker),
639 local_table => $self->loader->class_to_table->{$class1},
640 local_cols => \@class1_from_cols,
641 remote_table => $self->loader->class_to_table->{$class2},
642 remote_cols => \@class2_from_cols,
646 local_class => $class1,
647 link_class => $class,
648 local_moniker => $class1_local_moniker,
649 remote_moniker => $class1_remote_moniker,
653 push @{$all_code->{$class2}}, {
654 method => 'many_to_many',
656 $class2_to_class1_relname,
657 $class2_to_link_table_rel_name,
659 $self->_relationship_attrs('many_to_many', {}, {
660 rel_type => 'many_to_many',
661 rel_name => $class2_to_class1_relname,
662 local_source => $self->schema->source($class2_local_moniker),
663 remote_source => $self->schema->source($class2_remote_moniker),
664 local_table => $self->loader->class_to_table->{$class2},
665 local_cols => \@class2_from_cols,
666 remote_table => $self->loader->class_to_table->{$class1},
667 remote_cols => \@class1_from_cols,
671 local_class => $class2,
672 link_class => $class,
673 local_moniker => $class2_local_moniker,
674 remote_moniker => $class2_remote_moniker,
681 my ($self, $rels) = @_;
683 my @rels = map [ $_->{args}[0] => $_ ], @$rels;
685 $rel_names{$_}++ foreach map $_->[0], @rels;
687 my @dups = grep $rel_names{$_} > 1, keys %rel_names;
691 foreach my $dup (@dups) {
692 $dups{$dup} = [ map $_->[1], grep { $_->[0] eq $dup } @rels ];
703 $self->__tagger(Lingua::EN::Tagger->new) unless $self->__tagger;
705 return $self->__tagger;
709 my ($self, @cols) = @_;
713 foreach my $col (@cols) {
714 my @words = split_name $col;
716 my $tagged = $self->_tagger->get_readable(join ' ', @words);
718 push @adjectives, $tagged =~ m{\G(\w+)/JJ\s+}g;
724 sub _name_to_identifier {
725 my ($self, $name) = @_;
727 my $to_identifier = $self->loader->naming->{force_ascii} ?
728 \&String::ToIdentifier::EN::to_identifier
729 : \&String::ToIdentifier::EN::Unicode::to_identifier;
731 return join '_', map lc, split_name $to_identifier->($name, '_');
735 my ($self, $all_code, $in_class, $dups) = @_;
737 DUP: foreach my $dup (keys %$dups) {
738 my @rels = @{ $dups->{$dup} };
740 # Check if there are rels to the same table name in different
741 # schemas/databases, if so qualify them.
742 my @tables = map $self->loader->moniker_to_table->{$_->{extra}{remote_moniker}},
745 # databases are different, prepend database
746 if ($tables[0]->can('database') && (uniq map $_->database||'', @tables) > 1) {
747 # If any rels are in the same database, we have to distinguish by
748 # both schema and database.
750 $db_counts{$_}++ for map $_->database, @tables;
751 my $use_schema = any { $_ > 1 } values %db_counts;
753 foreach my $i (0..$#rels) {
755 my $table = $tables[$i];
757 $rel->{args}[0] = $self->_name_to_identifier($table->database)
758 . ($use_schema ? ('_' . $self->name_to_identifier($table->schema)) : '')
759 . '_' . $rel->{args}[0];
763 # schemas are different, prepend schema
764 elsif ((uniq map $_->schema||'', @tables) > 1) {
765 foreach my $i (0..$#rels) {
767 my $table = $tables[$i];
769 $rel->{args}[0] = $self->_name_to_identifier($table->schema)
770 . '_' . $rel->{args}[0];
775 foreach my $rel (@rels) {
776 next if $rel->{method} =~ /^(?:belongs_to|many_to_many)\z/;
778 my @to_cols = apply { s/^foreign\.//i }
779 keys %{ $rel->{args}[2] };
781 my @adjectives = $self->_adjectives(@to_cols);
783 # If there are no adjectives, and there is only one might_have
784 # rel to that class, we hardcode 'active'.
786 my $to_class = $rel->{args}[1];
788 if ((not @adjectives)
789 && (grep { $_->{method} eq 'might_have'
790 && $_->{args}[1] eq $to_class } @{ $all_code->{$in_class} }) == 1) {
792 @adjectives = 'active';
796 my $rel_name = join '_', sort(@adjectives), $rel->{args}[0];
798 ($rel_name) = $rel->{method} eq 'might_have' ?
799 $self->_inflect_singular($rel_name)
801 $self->_inflect_plural($rel_name);
803 my ($local_class, $local_moniker, $remote_moniker)
805 {qw/local_class local_moniker remote_moniker/};
807 my @from_cols = apply { s/^self\.//i }
808 values %{ $rel->{args}[2] };
810 ($rel_name) = $self->_rel_name_map($rel_name, $rel->{method}, $local_class, $local_moniker, \@from_cols, $to_class, $remote_moniker, \@to_cols);
812 $rel_name = $self->_resolve_relname_collision($local_moniker, \@from_cols, $rel_name);
814 $rel->{args}[0] = $rel_name;
819 # Check again for duplicates, since the heuristics above may not have resolved them all.
821 if ($dups = $self->_duplicates($all_code->{$in_class})) {
822 foreach my $dup (keys %$dups) {
824 my @rels = map $_->[1], sort { $a->[0] <=> $b->[0] } map [
830 }->{$_->{method}}, $_
831 ], @{ $dups->{$dup} };
835 foreach my $rel (@rels[1 .. $#rels]) {
836 my $inflect_type = $rel->{method} =~ /^(?:many_to_many|has_many)\z/ ?
841 my $inflect_method = "_$inflect_type";
843 my $relname_new_uninflected = $rel->{args}[0] . "_$rel_num";
847 my ($local_class, $local_moniker, $remote_moniker)
849 {qw/local_class local_moniker remote_moniker/};
851 my (@from_cols, @to_cols, $to_class);
853 if ($rel->{method} eq 'many_to_many') {
854 @from_cols = apply { s/^self\.//i } values %{
855 (first { $_->{args}[0] eq $rel->{args}[1] } @{ $all_code->{$local_class} })
858 @to_cols = apply { s/^foreign\.//i } keys %{
859 (first { $_->{args}[0] eq $rel->{args}[2] }
860 @{ $all_code->{ $rel->{extra}{link_class} } })
863 $to_class = $self->schema->source($remote_moniker)->result_class;
866 @from_cols = apply { s/^self\.//i } values %{ $rel->{args}[2] };
867 @to_cols = apply { s/^foreign\.//i } keys %{ $rel->{args}[2] };
868 $to_class = $rel->{args}[1];
871 my ($relname_new, $inflect_mapped) =
872 $self->$inflect_method($relname_new_uninflected);
876 ($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);
878 my $mapped = $inflect_mapped || $rel_name_mapped;
880 warn <<"EOF" unless $mapped;
881 Could not find a proper name for relationship '$relname_new' in source
882 '$local_moniker' for columns '@{[ join ',', @from_cols ]}'. Supply a value in
883 '$inflect_type' for '$relname_new_uninflected' or 'rel_name_map' for
884 '$relname_new' to name this relationship.
887 $relname_new = $self->_resolve_relname_collision($local_moniker, \@from_cols, $relname_new);
889 $rel->{args}[0] = $relname_new;
895 sub _relnames_and_method {
896 my ( $self, $local_moniker, $rel, $cond, $uniqs, $counters ) = @_;
898 my $remote_moniker = $rel->{remote_source};
899 my $remote_obj = $self->schema->source( $remote_moniker );
900 my $remote_class = $self->schema->class( $remote_moniker );
901 my $local_relname = $self->_local_relname( $rel->{remote_table}, $cond);
903 my $local_cols = $rel->{local_columns};
904 my $local_table = $rel->{local_table};
905 my $local_class = $self->schema->class($local_moniker);
906 my $local_source = $self->schema->source($local_moniker);
908 my $remote_relname_uninflected = $self->_normalize_name($local_table);
909 my ($remote_relname) = $self->_inflect_plural($self->_normalize_name($local_table));
911 my $remote_method = 'has_many';
913 # If the local columns have a UNIQUE constraint, this is a one-to-one rel
914 if (array_eq([ $local_source->primary_columns ], $local_cols) ||
915 first { array_eq($_->[1], $local_cols) } @$uniqs) {
916 $remote_method = 'might_have';
917 ($remote_relname) = $self->_inflect_singular($remote_relname_uninflected);
920 # If more than one rel between this pair of tables, use the local
921 # col names to distinguish, unless the rel was created previously.
922 if ($counters->{$remote_moniker} > 1) {
923 my $relationship_exists = 0;
925 if (-f (my $existing_remote_file = $self->loader->get_dump_filename($remote_class))) {
926 my $class = "${remote_class}Temporary";
928 if (not Class::Inspector->loaded($class)) {
929 my $code = slurp_file $existing_remote_file;
931 $code =~ s/(?<=package $remote_class)/Temporary/g;
933 $code =~ s/__PACKAGE__->meta->make_immutable[^;]*;//g;
938 push @{ $self->_temp_classes }, $class;
941 if ($class->has_relationship($remote_relname)) {
942 my $rel_cols = [ sort { $a cmp $b } apply { s/^foreign\.//i }
943 (keys %{ $class->relationship_info($remote_relname)->{cond} }) ];
945 $relationship_exists = 1 if array_eq([ sort @$local_cols ], $rel_cols);
949 if (not $relationship_exists) {
950 my $colnames = q{_} . $self->_normalize_name(join '_', @$local_cols);
951 $local_relname .= $colnames if keys %$cond > 1;
953 $remote_relname = $self->_strip_id_postfix($self->_normalize_name($local_table . $colnames));
955 $remote_relname_uninflected = $remote_relname;
956 ($remote_relname) = $self->_inflect_plural($remote_relname);
958 # if colnames were added and this is a might_have, re-inflect
959 if ($remote_method eq 'might_have') {
960 ($remote_relname) = $self->_inflect_singular($remote_relname_uninflected);
965 return ($local_relname, $remote_relname, $remote_method);
969 my ($self, $relname, $method, $local_class, $local_moniker, $local_cols,
970 $remote_class, $remote_moniker, $remote_cols, $extra) = @_;
976 local_class => $local_class,
977 local_moniker => $local_moniker,
978 local_columns => $local_cols,
979 remote_class => $remote_class,
980 remote_moniker => $remote_moniker,
981 remote_columns => $remote_cols,
984 $self->_run_user_map($self->rel_name_map, $info);
988 my ($self, $map, $info) = @_;
990 my $new_name = $info->{name};
993 if ('HASH' eq ref($map)) {
994 my $name = $info->{name};
995 my $moniker = $info->{local_moniker};
996 if ($map->{$moniker} and 'HASH' eq ref($map->{$moniker})
997 and $map->{$moniker}{$name}
999 $new_name = $map->{$moniker}{$name};
1002 elsif ($map->{$name} and not 'HASH' eq ref($map->{$name})) {
1003 $new_name = $map->{$name};
1007 elsif ('CODE' eq ref($map)) {
1010 croak "reentered rel_name_map must be a hashref"
1011 unless 'HASH' eq ref($cb_map);
1012 my ($cb_name, $cb_mapped) = $self->_run_user_map($cb_map, $info);
1013 return $cb_mapped && $cb_name;
1015 my $name = $map->($info, $cb);
1022 return ($new_name, $mapped);
1028 for my $class (@{ $self->_temp_classes }) {
1029 Class::Unload->unload($class);
1032 $self->_temp_classes([]);
1037 See L<DBIx::Class::Schema::Loader/AUTHOR> and L<DBIx::Class::Schema::Loader/CONTRIBUTORS>.
1041 This library is free software; you can redistribute it and/or modify it under
1042 the same terms as Perl itself.
1047 # vim:et sts=4 sw=4 tw=0: