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/;
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 = '0.07037';
25 # remote_relname -- name of relationship from the local table referring to the remote table
26 # local_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, $self->loader->_get_naming_v('relationships');
326 return join '_', map lc, @words;
329 sub _remote_relname {
330 my ($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($col));
338 ($remote_relname) = $self->_inflect_singular($col);
341 ($remote_relname) = $self->_inflect_singular($self->_normalize_name($remote_table));
344 return $remote_relname;
347 sub _resolve_relname_collision {
348 my ($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;
387 while (my ($local_moniker, $rels, $uniqs) = @{ shift @tables || [] }) {
388 my $local_class = $self->schema->class($local_moniker);
391 foreach my $rel (@$rels) {
392 next if !$rel->{remote_source};
393 $counters{$rel->{remote_source}}++;
396 foreach my $rel (@$rels) {
397 my $remote_moniker = $rel->{remote_source}
400 my $remote_class = $self->schema->class($remote_moniker);
401 my $remote_obj = $self->schema->source($remote_moniker);
402 my $remote_cols = $rel->{remote_columns} || [ $remote_obj->primary_columns ];
404 my $local_cols = $rel->{local_columns};
406 if($#$local_cols != $#$remote_cols) {
407 croak "Column count mismatch: $local_moniker (@$local_cols) "
408 . "$remote_moniker (@$remote_cols)";
412 foreach my $i (0 .. $#$local_cols) {
413 $cond{$remote_cols->[$i]} = $local_cols->[$i];
416 my ( $local_relname, $remote_relname, $remote_method ) =
417 $self->_relnames_and_method( $local_moniker, $rel, \%cond, $uniqs, \%counters );
418 my $local_method = 'belongs_to';
420 ($remote_relname) = $self->_rel_name_map($remote_relname, $local_method, $local_class, $local_moniker, $local_cols, $remote_class, $remote_moniker, $remote_cols);
421 ($local_relname) = $self->_rel_name_map($local_relname, $remote_method, $remote_class, $remote_moniker, $remote_cols, $local_class, $local_moniker, $local_cols);
423 $remote_relname = $self->_resolve_relname_collision($local_moniker, $local_cols, $remote_relname);
424 $local_relname = $self->_resolve_relname_collision($remote_moniker, $remote_cols, $local_relname);
426 my $rel_attrs_params = {
427 rel_name => $remote_relname,
428 rel_type => $local_method,
429 local_source => $self->schema->source($local_moniker),
430 remote_source => $self->schema->source($remote_moniker),
431 local_table => $rel->{local_table},
432 local_cols => $local_cols,
433 remote_table => $rel->{remote_table},
434 remote_cols => $remote_cols,
437 push(@{$all_code->{$local_class}},
438 { method => $local_method,
439 args => [ $remote_relname,
442 $self->_remote_attrs($local_moniker, $local_cols, $rel->{attrs}, $rel_attrs_params),
445 local_class => $local_class,
446 local_moniker => $local_moniker,
447 remote_moniker => $remote_moniker,
452 my %rev_cond = reverse %cond;
453 for (keys %rev_cond) {
454 $rev_cond{"foreign.$_"} = "self.".$rev_cond{$_};
455 delete $rev_cond{$_};
458 $rel_attrs_params = {
459 rel_name => $local_relname,
460 rel_type => $remote_method,
461 local_source => $self->schema->source($remote_moniker),
462 remote_source => $self->schema->source($local_moniker),
463 local_table => $rel->{remote_table},
464 local_cols => $remote_cols,
465 remote_table => $rel->{local_table},
466 remote_cols => $local_cols,
469 push(@{$all_code->{$remote_class}},
470 { method => $remote_method,
471 args => [ $local_relname,
474 $self->_relationship_attrs($remote_method, {}, $rel_attrs_params),
477 local_class => $remote_class,
478 local_moniker => $remote_moniker,
479 remote_moniker => $local_moniker,
486 $self->_generate_m2ms($all_code);
488 # disambiguate rels with the same name
489 foreach my $class (keys %$all_code) {
490 my $dups = $self->_duplicates($all_code->{$class});
492 $self->_disambiguate($all_code, $class, $dups) if $dups;
500 # Find classes with only 2 FKs which are the PK and make many_to_many bridges for them.
502 my ($self, $all_code) = @_;
504 while (my ($class, $rels) = each %$all_code) {
505 next unless (grep $_->{method} eq 'belongs_to', @$rels) == 2;
507 my $class1_local_moniker = $rels->[0]{extra}{remote_moniker};
508 my $class1_remote_moniker = $rels->[1]{extra}{remote_moniker};
510 my $class2_local_moniker = $rels->[1]{extra}{remote_moniker};
511 my $class2_remote_moniker = $rels->[0]{extra}{remote_moniker};
513 my $class1 = $rels->[0]{args}[1];
514 my $class2 = $rels->[1]{args}[1];
516 my $class1_to_link_table_rel = first {
517 $_->{method} eq 'has_many' && $_->{args}[1] eq $class
518 } @{ $all_code->{$class1} };
520 next unless $class1_to_link_table_rel;
522 my $class1_to_link_table_rel_name = $class1_to_link_table_rel->{args}[0];
524 my $class2_to_link_table_rel = first {
525 $_->{method} eq 'has_many' && $_->{args}[1] eq $class
526 } @{ $all_code->{$class2} };
528 next unless $class2_to_link_table_rel;
530 my $class2_to_link_table_rel_name = $class2_to_link_table_rel->{args}[0];
532 my $class1_link_rel = $rels->[1]{args}[0];
533 my $class2_link_rel = $rels->[0]{args}[0];
535 my @class1_from_cols = apply { s/^self\.//i } values %{
536 $class1_to_link_table_rel->{args}[2]
539 my @class1_link_cols = apply { s/^self\.//i } values %{ $rels->[1]{args}[2] };
541 my @class1_to_cols = apply { s/^foreign\.//i } keys %{ $rels->[1]{args}[2] };
543 my @class2_from_cols = apply { s/^self\.//i } values %{
544 $class2_to_link_table_rel->{args}[2]
547 my @class2_link_cols = apply { s/^self\.//i } values %{ $rels->[0]{args}[2] };
549 my @class2_to_cols = apply { s/^foreign\.//i } keys %{ $rels->[0]{args}[2] };
551 my $link_moniker = $rels->[0]{extra}{local_moniker};
553 my @link_table_cols =
554 @{[ $self->schema->source($link_moniker)->columns ]};
556 my @link_table_primary_cols =
557 @{[ $self->schema->source($link_moniker)->primary_columns ]};
559 next unless @class1_link_cols + @class2_link_cols == @link_table_cols
560 && @link_table_cols == @link_table_primary_cols;
562 my ($class1_to_class2_relname) = $self->_rel_name_map(
563 ($self->_inflect_plural($class1_link_rel))[0],
566 $class1_local_moniker,
569 $class1_remote_moniker,
572 link_class => $class,
573 link_moniker => $link_moniker,
574 link_rel_name => $class1_to_link_table_rel_name,
578 $class1_to_class2_relname = $self->_resolve_relname_collision(
579 $class1_local_moniker,
581 $class1_to_class2_relname,
584 my ($class2_to_class1_relname) = $self->_rel_name_map(
585 ($self->_inflect_plural($class2_link_rel))[0],
588 $class2_local_moniker,
591 $class2_remote_moniker,
594 link_class => $class,
595 link_moniker => $link_moniker,
596 link_rel_name => $class2_to_link_table_rel_name,
600 $class2_to_class1_relname = $self->_resolve_relname_collision(
601 $class2_local_moniker,
603 $class2_to_class1_relname,
606 push @{$all_code->{$class1}}, {
607 method => 'many_to_many',
609 $class1_to_class2_relname,
610 $class1_to_link_table_rel_name,
612 $self->_relationship_attrs('many_to_many', {}, {
613 rel_type => 'many_to_many',
614 rel_name => $class1_to_class2_relname,
615 local_source => $self->schema->source($class1_local_moniker),
616 remote_source => $self->schema->source($class1_remote_moniker),
617 local_table => $self->loader->class_to_table->{$class1},
618 local_cols => \@class1_from_cols,
619 remote_table => $self->loader->class_to_table->{$class2},
620 remote_cols => \@class2_from_cols,
624 local_class => $class1,
625 link_class => $class,
626 local_moniker => $class1_local_moniker,
627 remote_moniker => $class1_remote_moniker,
631 push @{$all_code->{$class2}}, {
632 method => 'many_to_many',
634 $class2_to_class1_relname,
635 $class2_to_link_table_rel_name,
637 $self->_relationship_attrs('many_to_many', {}, {
638 rel_type => 'many_to_many',
639 rel_name => $class2_to_class1_relname,
640 local_source => $self->schema->source($class2_local_moniker),
641 remote_source => $self->schema->source($class2_remote_moniker),
642 local_table => $self->loader->class_to_table->{$class2},
643 local_cols => \@class2_from_cols,
644 remote_table => $self->loader->class_to_table->{$class1},
645 remote_cols => \@class1_from_cols,
649 local_class => $class2,
650 link_class => $class,
651 local_moniker => $class2_local_moniker,
652 remote_moniker => $class2_remote_moniker,
659 my ($self, $rels) = @_;
661 my @rels = map [ $_->{args}[0] => $_ ], @$rels;
663 $rel_names{$_}++ foreach map $_->[0], @rels;
665 my @dups = grep $rel_names{$_} > 1, keys %rel_names;
669 foreach my $dup (@dups) {
670 $dups{$dup} = [ map $_->[1], grep { $_->[0] eq $dup } @rels ];
681 $self->__tagger(Lingua::EN::Tagger->new) unless $self->__tagger;
683 return $self->__tagger;
687 my ($self, @cols) = @_;
691 foreach my $col (@cols) {
692 my @words = split_name $col;
694 my $tagged = $self->_tagger->get_readable(join ' ', @words);
696 push @adjectives, $tagged =~ m{\G(\w+)/JJ\s+}g;
702 sub _name_to_identifier {
703 my ($self, $name) = @_;
705 my $to_identifier = $self->loader->naming->{force_ascii} ?
706 \&String::ToIdentifier::EN::to_identifier
707 : \&String::ToIdentifier::EN::Unicode::to_identifier;
709 return join '_', map lc, split_name $to_identifier->($name, '_');
713 my ($self, $all_code, $in_class, $dups) = @_;
715 DUP: foreach my $dup (keys %$dups) {
716 my @rels = @{ $dups->{$dup} };
718 # Check if there are rels to the same table name in different
719 # schemas/databases, if so qualify them.
720 my @tables = map $self->loader->moniker_to_table->{$_->{extra}{remote_moniker}},
723 # databases are different, prepend database
724 if ($tables[0]->can('database') && (uniq map $_->database||'', @tables) > 1) {
725 # If any rels are in the same database, we have to distinguish by
726 # both schema and database.
728 $db_counts{$_}++ for map $_->database, @tables;
729 my $use_schema = any { $_ > 1 } values %db_counts;
731 foreach my $i (0..$#rels) {
733 my $table = $tables[$i];
735 $rel->{args}[0] = $self->_name_to_identifier($table->database)
736 . ($use_schema ? ('_' . $self->name_to_identifier($table->schema)) : '')
737 . '_' . $rel->{args}[0];
741 # schemas are different, prepend schema
742 elsif ((uniq map $_->schema||'', @tables) > 1) {
743 foreach my $i (0..$#rels) {
745 my $table = $tables[$i];
747 $rel->{args}[0] = $self->_name_to_identifier($table->schema)
748 . '_' . $rel->{args}[0];
753 foreach my $rel (@rels) {
754 next if $rel->{method} =~ /^(?:belongs_to|many_to_many)\z/;
756 my @to_cols = apply { s/^foreign\.//i }
757 keys %{ $rel->{args}[2] };
759 my @adjectives = $self->_adjectives(@to_cols);
761 # If there are no adjectives, and there is only one might_have
762 # rel to that class, we hardcode 'active'.
764 my $to_class = $rel->{args}[1];
766 if ((not @adjectives)
767 && (grep { $_->{method} eq 'might_have'
768 && $_->{args}[1] eq $to_class } @{ $all_code->{$in_class} }) == 1) {
770 @adjectives = 'active';
774 my $rel_name = join '_', sort(@adjectives), $rel->{args}[0];
776 ($rel_name) = $rel->{method} eq 'might_have' ?
777 $self->_inflect_singular($rel_name)
779 $self->_inflect_plural($rel_name);
781 my ($local_class, $local_moniker, $remote_moniker)
783 {qw/local_class local_moniker remote_moniker/};
785 my @from_cols = apply { s/^self\.//i }
786 values %{ $rel->{args}[2] };
788 ($rel_name) = $self->_rel_name_map($rel_name, $rel->{method}, $local_class, $local_moniker, \@from_cols, $to_class, $remote_moniker, \@to_cols);
790 $rel_name = $self->_resolve_relname_collision($local_moniker, \@from_cols, $rel_name);
792 $rel->{args}[0] = $rel_name;
797 # Check again for duplicates, since the heuristics above may not have resolved them all.
799 if ($dups = $self->_duplicates($all_code->{$in_class})) {
800 foreach my $dup (keys %$dups) {
802 my @rels = map $_->[1], sort { $a->[0] <=> $b->[0] } map [
808 }->{$_->{method}}, $_
809 ], @{ $dups->{$dup} };
813 foreach my $rel (@rels[1 .. $#rels]) {
814 my $inflect_type = $rel->{method} =~ /^(?:many_to_many|has_many)\z/ ?
819 my $inflect_method = "_$inflect_type";
821 my $relname_new_uninflected = $rel->{args}[0] . "_$rel_num";
825 my ($local_class, $local_moniker, $remote_moniker)
827 {qw/local_class local_moniker remote_moniker/};
829 my (@from_cols, @to_cols, $to_class);
831 if ($rel->{method} eq 'many_to_many') {
832 @from_cols = apply { s/^self\.//i } values %{
833 (first { $_->{args}[0] eq $rel->{args}[1] } @{ $all_code->{$local_class} })
836 @to_cols = apply { s/^foreign\.//i } keys %{
837 (first { $_->{args}[0] eq $rel->{args}[2] }
838 @{ $all_code->{ $rel->{extra}{link_class} } })
841 $to_class = $self->schema->source($remote_moniker)->result_class;
844 @from_cols = apply { s/^self\.//i } values %{ $rel->{args}[2] };
845 @to_cols = apply { s/^foreign\.//i } keys %{ $rel->{args}[2] };
846 $to_class = $rel->{args}[1];
849 my ($relname_new, $inflect_mapped) =
850 $self->$inflect_method($relname_new_uninflected);
854 ($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);
856 my $mapped = $inflect_mapped || $rel_name_mapped;
858 warn <<"EOF" unless $mapped;
859 Could not find a proper name for relationship '$relname_new' in source
860 '$local_moniker' for columns '@{[ join ',', @from_cols ]}'. Supply a value in
861 '$inflect_type' for '$relname_new_uninflected' or 'rel_name_map' for
862 '$relname_new' to name this relationship.
865 $relname_new = $self->_resolve_relname_collision($local_moniker, \@from_cols, $relname_new);
867 $rel->{args}[0] = $relname_new;
873 sub _relnames_and_method {
874 my ( $self, $local_moniker, $rel, $cond, $uniqs, $counters ) = @_;
876 my $remote_moniker = $rel->{remote_source};
877 my $remote_obj = $self->schema->source( $remote_moniker );
878 my $remote_class = $self->schema->class( $remote_moniker );
879 my $remote_relname = $self->_remote_relname( $rel->{remote_table}, $cond);
881 my $local_cols = $rel->{local_columns};
882 my $local_table = $rel->{local_table};
883 my $local_class = $self->schema->class($local_moniker);
884 my $local_source = $self->schema->source($local_moniker);
886 my $local_relname_uninflected = $self->_normalize_name($local_table);
887 my ($local_relname) = $self->_inflect_plural($self->_normalize_name($local_table));
889 my $remote_method = 'has_many';
891 # If the local columns have a UNIQUE constraint, this is a one-to-one rel
892 if (array_eq([ $local_source->primary_columns ], $local_cols) ||
893 first { array_eq($_->[1], $local_cols) } @$uniqs) {
894 $remote_method = 'might_have';
895 ($local_relname) = $self->_inflect_singular($local_relname_uninflected);
898 # If more than one rel between this pair of tables, use the local
899 # col names to distinguish, unless the rel was created previously.
900 if ($counters->{$remote_moniker} > 1) {
901 my $relationship_exists = 0;
903 if (-f (my $existing_remote_file = $self->loader->get_dump_filename($remote_class))) {
904 my $class = "${remote_class}Temporary";
906 if (not Class::Inspector->loaded($class)) {
907 my $code = slurp_file $existing_remote_file;
909 $code =~ s/(?<=package $remote_class)/Temporary/g;
911 $code =~ s/__PACKAGE__->meta->make_immutable[^;]*;//g;
916 push @{ $self->_temp_classes }, $class;
919 if ($class->has_relationship($local_relname)) {
920 my $rel_cols = [ sort { $a cmp $b } apply { s/^foreign\.//i }
921 (keys %{ $class->relationship_info($local_relname)->{cond} }) ];
923 $relationship_exists = 1 if array_eq([ sort @$local_cols ], $rel_cols);
927 if (not $relationship_exists) {
928 my $colnames = q{_} . $self->_normalize_name(join '_', @$local_cols);
929 $remote_relname .= $colnames if keys %$cond > 1;
931 $local_relname = $self->_strip_id_postfix($self->_normalize_name($local_table . $colnames));
933 $local_relname_uninflected = $local_relname;
934 ($local_relname) = $self->_inflect_plural($local_relname);
936 # if colnames were added and this is a might_have, re-inflect
937 if ($remote_method eq 'might_have') {
938 ($local_relname) = $self->_inflect_singular($local_relname_uninflected);
943 return ($local_relname, $remote_relname, $remote_method);
947 my ($self, $relname, $method, $local_class, $local_moniker, $local_cols,
948 $remote_class, $remote_moniker, $remote_cols, $extra) = @_;
954 local_class => $local_class,
955 local_moniker => $local_moniker,
956 local_columns => $local_cols,
957 remote_class => $remote_class,
958 remote_moniker => $remote_moniker,
959 remote_columns => $remote_cols,
962 my $new_name = $relname;
964 my $map = $self->rel_name_map;
967 if ('HASH' eq ref($map)) {
968 my $name = $info->{name};
969 my $moniker = $info->{local_moniker};
970 if ($map->{$moniker} and 'HASH' eq ref($map->{$moniker})
971 and $map->{$moniker}{$name}
973 $new_name = $map->{$moniker}{$name};
976 elsif ($map->{$name} and not 'HASH' eq ref($map->{$name})) {
977 $new_name = $map->{$name};
981 elsif ('CODE' eq ref($map)) {
982 my $name = $map->($info);
989 return ($new_name, $mapped);
995 for my $class (@{ $self->_temp_classes }) {
996 Class::Unload->unload($class);
999 $self->_temp_classes([]);
1004 See L<DBIx::Class::Schema::Loader/AUTHOR> and L<DBIx::Class::Schema::Loader/CONTRIBUTORS>.
1008 This library is free software; you can redistribute it and/or modify it under
1009 the same terms as Perl itself.
1014 # vim:et sts=4 sw=4 tw=0: