X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDBIx%2FClass%2FSchema%2FLoader%2FRelBuilder.pm;h=85d011031e41e6039b1087cd5369c0d00d83851c;hb=2f01b5e3e1ba77316270cb2d7feac4330fd2ff7e;hp=14f618de8fd628e648821700410d4eec8bf68e6e;hpb=8e6c80c9ded48d2f9450de4200c4490b13d0c942;p=dbsrgits%2FDBIx-Class-Schema-Loader.git diff --git a/lib/DBIx/Class/Schema/Loader/RelBuilder.pm b/lib/DBIx/Class/Schema/Loader/RelBuilder.pm index 14f618d..85d0110 100644 --- a/lib/DBIx/Class/Schema/Loader/RelBuilder.pm +++ b/lib/DBIx/Class/Schema/Loader/RelBuilder.pm @@ -6,8 +6,9 @@ use base 'Class::Accessor::Grouped'; use mro 'c3'; use Carp::Clan qw/^DBIx::Class/; use Scalar::Util 'weaken'; -use DBIx::Class::Schema::Loader::Utils qw/split_name slurp_file/; +use DBIx::Class::Schema::Loader::Utils qw/split_name slurp_file array_eq/; use Try::Tiny; +use List::Util 'first'; use List::MoreUtils qw/apply uniq any/; use namespace::clean; use Lingua::EN::Inflect::Phrase (); @@ -17,7 +18,7 @@ use String::ToIdentifier::EN::Unicode (); use Class::Unload (); use Class::Inspector (); -our $VERSION = '0.07011'; +our $VERSION = '0.07036_04'; # Glossary: # @@ -46,8 +47,8 @@ Arguments: $loader object =head2 generate_code -Arguments: - +Arguments: + [ [ local_moniker1 (scalar), fk_info1 (arrayref), uniq_info1 (arrayref) ] [ local_moniker2 (scalar), fk_info2 (arrayref), uniq_info2 (arrayref) ] @@ -148,8 +149,8 @@ sub new { # validate the relationship_attrs arg if( defined $self->relationship_attrs ) { - ref $self->relationship_attrs eq 'HASH' - or croak "relationship_attrs must be a hashref"; + (ref $self->relationship_attrs eq 'HASH' || ref $self->relationship_attrs eq 'CODE') + or croak "relationship_attrs must be a hashref or coderef"; } return $self; @@ -248,24 +249,39 @@ sub _default_relationship_attrs { +{ }, } } -# accessor for options to be passed to each generated relationship -# type. take single argument, the relationship type name, and returns -# either a hashref (if some options are set), or nothing +# Accessor for options to be passed to each generated relationship type. takes +# the relationship type name and optionally any attributes from the database +# (such as FK ON DELETE/UPDATE and DEFERRABLE clauses), and returns a +# hashref or undef if nothing is set. +# +# The attributes from the database override the default attributes, which in +# turn are overridden by user supplied attributes. sub _relationship_attrs { - my ( $self, $reltype ) = @_; + my ( $self, $reltype, $db_attrs, $params ) = @_; my $r = $self->relationship_attrs; my %composite = ( %{ $self->_default_relationship_attrs->{$reltype} || {} }, - %{ $r->{all} || {} } + %{ $db_attrs || {} }, + ( + ref $r eq 'HASH' ? ( + %{ $r->{all} || {} }, + %{ $r->{$reltype} || {} }, + ) + : + () + ), ); - if( my $specific = $r->{$reltype} ) { - while( my ($k,$v) = each %$specific ) { - $composite{$k} = $v; - } + if (ref $r eq 'CODE') { + $params->{attrs} = \%composite; + + my %ret = %{ $r->(%$params) || {} }; + + %composite = %ret if %ret; } - return \%composite; + + return %composite ? \%composite : undef; } sub _strip_id_postfix { @@ -276,26 +292,15 @@ sub _strip_id_postfix { return $name; } -sub _array_eq { - my ($self, $a, $b) = @_; - - return unless @$a == @$b; - - for (my $i = 0; $i < @$a; $i++) { - return unless $a->[$i] eq $b->[$i]; - } - return 1; -} - sub _remote_attrs { - my ($self, $local_moniker, $local_cols) = @_; + my ($self, $local_moniker, $local_cols, $fk_attrs, $params) = @_; - # get our base set of attrs from _relationship_attrs, if present - my $attrs = $self->_relationship_attrs('belongs_to') || {}; + # get our set of attrs from _relationship_attrs, which uses the FK attrs if available + my $attrs = $self->_relationship_attrs('belongs_to', $fk_attrs, $params) || {}; - # If the referring column is nullable, make 'belongs_to' an + # If any referring column is nullable, make 'belongs_to' an # outer join, unless explicitly set by relationship_attrs - my $nullable = grep { $self->schema->source($local_moniker)->column_info($_)->{is_nullable} } @$local_cols; + my $nullable = first { $self->schema->source($local_moniker)->column_info($_)->{is_nullable} } @$local_cols; $attrs->{join_type} = 'LEFT' if $nullable && !defined $attrs->{join_type}; return $attrs; @@ -373,7 +378,7 @@ EOF sub generate_code { my ($self, $tables) = @_; - + # make a copy to destroy my @tables = @$tables; @@ -418,12 +423,23 @@ sub generate_code { $remote_relname = $self->_resolve_relname_collision($local_moniker, $local_cols, $remote_relname); $local_relname = $self->_resolve_relname_collision($remote_moniker, $remote_cols, $local_relname); + my $rel_attrs_params = { + rel_name => $remote_relname, + rel_type => $local_method, + local_source => $self->schema->source($local_moniker), + remote_source => $self->schema->source($remote_moniker), + local_table => $rel->{local_table}, + local_cols => $local_cols, + remote_table => $rel->{remote_table}, + remote_cols => $remote_cols, + }; + push(@{$all_code->{$local_class}}, { method => $local_method, args => [ $remote_relname, $remote_class, \%cond, - $self->_remote_attrs($local_moniker, $local_cols), + $self->_remote_attrs($local_moniker, $local_cols, $rel->{attrs}, $rel_attrs_params), ], extra => { local_class => $local_class, @@ -439,12 +455,23 @@ sub generate_code { delete $rev_cond{$_}; } + $rel_attrs_params = { + rel_name => $local_relname, + rel_type => $remote_method, + local_source => $self->schema->source($remote_moniker), + remote_source => $self->schema->source($local_moniker), + local_table => $rel->{remote_table}, + local_cols => $remote_cols, + remote_table => $rel->{local_table}, + remote_cols => $local_cols, + }; + push(@{$all_code->{$remote_class}}, { method => $remote_method, args => [ $local_relname, $local_class, \%rev_cond, - $self->_relationship_attrs($remote_method), + $self->_relationship_attrs($remote_method, {}, $rel_attrs_params), ], extra => { local_class => $remote_class, @@ -456,11 +483,13 @@ sub generate_code { } } + $self->_generate_m2ms($all_code); + # disambiguate rels with the same name foreach my $class (keys %$all_code) { my $dups = $self->_duplicates($all_code->{$class}); - $self->_disambiguate($all_code->{$class}, $dups) if $dups; + $self->_disambiguate($all_code, $class, $dups) if $dups; } $self->_cleanup; @@ -468,6 +497,164 @@ sub generate_code { return $all_code; } +# Find classes with only 2 FKs which are the PK and make many_to_many bridges for them. +sub _generate_m2ms { + my ($self, $all_code) = @_; + + while (my ($class, $rels) = each %$all_code) { + next unless (grep $_->{method} eq 'belongs_to', @$rels) == 2; + + my $class1_local_moniker = $rels->[0]{extra}{remote_moniker}; + my $class1_remote_moniker = $rels->[1]{extra}{remote_moniker}; + + my $class2_local_moniker = $rels->[1]{extra}{remote_moniker}; + my $class2_remote_moniker = $rels->[0]{extra}{remote_moniker}; + + my $class1 = $rels->[0]{args}[1]; + my $class2 = $rels->[1]{args}[1]; + + my $class1_to_link_table_rel = first { + $_->{method} eq 'has_many' && $_->{args}[1] eq $class + } @{ $all_code->{$class1} }; + + next unless $class1_to_link_table_rel; + + my $class1_to_link_table_rel_name = $class1_to_link_table_rel->{args}[0]; + + my $class2_to_link_table_rel = first { + $_->{method} eq 'has_many' && $_->{args}[1] eq $class + } @{ $all_code->{$class2} }; + + next unless $class2_to_link_table_rel; + + my $class2_to_link_table_rel_name = $class2_to_link_table_rel->{args}[0]; + + my $class1_link_rel = $rels->[1]{args}[0]; + my $class2_link_rel = $rels->[0]{args}[0]; + + my @class1_from_cols = apply { s/^self\.//i } values %{ + $class1_to_link_table_rel->{args}[2] + }; + + my @class1_link_cols = apply { s/^self\.//i } values %{ $rels->[1]{args}[2] }; + + my @class1_to_cols = apply { s/^foreign\.//i } keys %{ $rels->[1]{args}[2] }; + + my @class2_from_cols = apply { s/^self\.//i } values %{ + $class2_to_link_table_rel->{args}[2] + }; + + my @class2_link_cols = apply { s/^self\.//i } values %{ $rels->[0]{args}[2] }; + + my @class2_to_cols = apply { s/^foreign\.//i } keys %{ $rels->[0]{args}[2] }; + + my $link_moniker = $rels->[0]{extra}{local_moniker}; + + my @link_table_cols = + @{[ $self->schema->source($link_moniker)->columns ]}; + + my @link_table_primary_cols = + @{[ $self->schema->source($link_moniker)->primary_columns ]}; + + next unless @class1_link_cols + @class2_link_cols == @link_table_cols + && @link_table_cols == @link_table_primary_cols; + + my ($class1_to_class2_relname) = $self->_rel_name_map( + ($self->_inflect_plural($class1_link_rel))[0], + 'many_to_many', + $class1, + $class1_local_moniker, + \@class1_from_cols, + $class2, + $class1_remote_moniker, + \@class1_to_cols, + { + link_class => $class, + link_moniker => $link_moniker, + link_rel_name => $class1_to_link_table_rel_name, + }, + ); + + $class1_to_class2_relname = $self->_resolve_relname_collision( + $class1_local_moniker, + \@class1_from_cols, + $class1_to_class2_relname, + ); + + my ($class2_to_class1_relname) = $self->_rel_name_map( + ($self->_inflect_plural($class2_link_rel))[0], + 'many_to_many', + $class1, + $class2_local_moniker, + \@class2_from_cols, + $class2, + $class2_remote_moniker, + \@class2_to_cols, + { + link_class => $class, + link_moniker => $link_moniker, + link_rel_name => $class2_to_link_table_rel_name, + }, + ); + + $class2_to_class1_relname = $self->_resolve_relname_collision( + $class2_local_moniker, + \@class2_from_cols, + $class2_to_class1_relname, + ); + + push @{$all_code->{$class1}}, { + method => 'many_to_many', + args => [ + $class1_to_class2_relname, + $class1_to_link_table_rel_name, + $class1_link_rel, + $self->_relationship_attrs('many_to_many', {}, { + rel_type => 'many_to_many', + rel_name => $class1_to_class2_relname, + local_source => $self->schema->source($class1_local_moniker), + remote_source => $self->schema->source($class1_remote_moniker), + local_table => $self->loader->class_to_table->{$class1}, + local_cols => \@class1_from_cols, + remote_table => $self->loader->class_to_table->{$class2}, + remote_cols => \@class2_from_cols, + }) || (), + ], + extra => { + local_class => $class1, + link_class => $class, + local_moniker => $class1_local_moniker, + remote_moniker => $class1_remote_moniker, + }, + }; + + push @{$all_code->{$class2}}, { + method => 'many_to_many', + args => [ + $class2_to_class1_relname, + $class2_to_link_table_rel_name, + $class2_link_rel, + $self->_relationship_attrs('many_to_many', {}, { + rel_type => 'many_to_many', + rel_name => $class2_to_class1_relname, + local_source => $self->schema->source($class2_local_moniker), + remote_source => $self->schema->source($class2_remote_moniker), + local_table => $self->loader->class_to_table->{$class2}, + local_cols => \@class2_from_cols, + remote_table => $self->loader->class_to_table->{$class1}, + remote_cols => \@class1_from_cols, + }) || (), + ], + extra => { + local_class => $class2, + link_class => $class, + local_moniker => $class2_local_moniker, + remote_moniker => $class2_remote_moniker, + }, + }; + } +} + sub _duplicates { my ($self, $rels) = @_; @@ -523,7 +710,7 @@ sub _name_to_identifier { } sub _disambiguate { - my ($self, $all_rels, $dups) = @_; + my ($self, $all_code, $in_class, $dups) = @_; DUP: foreach my $dup (keys %$dups) { my @rels = @{ $dups->{$dup} }; @@ -564,7 +751,7 @@ sub _disambiguate { } foreach my $rel (@rels) { - next if $rel->{method} eq 'belongs_to'; + next if $rel->{method} =~ /^(?:belongs_to|many_to_many)\z/; my @to_cols = apply { s/^foreign\.//i } keys %{ $rel->{args}[2] }; @@ -578,7 +765,7 @@ sub _disambiguate { if ((not @adjectives) && (grep { $_->{method} eq 'might_have' - && $_->{args}[1] eq $to_class } @$all_rels) == 1) { + && $_->{args}[1] eq $to_class } @{ $all_code->{$in_class} }) == 1) { @adjectives = 'active'; } @@ -609,17 +796,22 @@ sub _disambiguate { # Check again for duplicates, since the heuristics above may not have resolved them all. - if ($dups = $self->_duplicates($all_rels)) { + if ($dups = $self->_duplicates($all_code->{$in_class})) { foreach my $dup (keys %$dups) { # sort by method my @rels = map $_->[1], sort { $a->[0] <=> $b->[0] } map [ - ($_->{method} eq 'belongs_to' ? 3 : $_->{method} eq 'has_many' ? 2 : 1), $_ + { + belongs_to => 3, + has_many => 2, + might_have => 1, + many_to_many => 0, + }->{$_->{method}}, $_ ], @{ $dups->{$dup} }; my $rel_num = 2; foreach my $rel (@rels[1 .. $#rels]) { - my $inflect_type = $rel->{method} eq 'has_many' ? + my $inflect_type = $rel->{method} =~ /^(?:many_to_many|has_many)\z/ ? 'inflect_plural' : 'inflect_singular'; @@ -634,13 +826,25 @@ sub _disambiguate { = @{ $rel->{extra} } {qw/local_class local_moniker remote_moniker/}; - my @from_cols = apply { s/^self\.//i } - values %{ $rel->{args}[2] }; - - my @to_cols = apply { s/^foreign\.//i } - keys %{ $rel->{args}[2] }; - - my $to_class = $rel->{args}[1]; + my (@from_cols, @to_cols, $to_class); + + if ($rel->{method} eq 'many_to_many') { + @from_cols = apply { s/^self\.//i } values %{ + (first { $_->{args}[0] eq $rel->{args}[1] } @{ $all_code->{$local_class} }) + ->{args}[2] + }; + @to_cols = apply { s/^foreign\.//i } keys %{ + (first { $_->{args}[0] eq $rel->{args}[2] } + @{ $all_code->{ $rel->{extra}{link_class} } }) + ->{args}[2] + }; + $to_class = $self->schema->source($remote_moniker)->result_class; + } + else { + @from_cols = apply { s/^self\.//i } values %{ $rel->{args}[2] }; + @to_cols = apply { s/^foreign\.//i } keys %{ $rel->{args}[2] }; + $to_class = $rel->{args}[1]; + } my ($relname_new, $inflect_mapped) = $self->$inflect_method($relname_new_uninflected); @@ -648,14 +852,14 @@ sub _disambiguate { my $rel_name_mapped; ($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); - + my $mapped = $inflect_mapped || $rel_name_mapped; warn <<"EOF" unless $mapped; Could not find a proper name for relationship '$relname_new' in source '$local_moniker' for columns '@{[ join ',', @from_cols ]}'. Supply a value in -'$inflect_type' or 'rel_name_map' for '$relname_new_uninflected' to name this -relationship. +'$inflect_type' for '$relname_new_uninflected' or 'rel_name_map' for +'$relname_new' to name this relationship. EOF $relname_new = $self->_resolve_relname_collision($local_moniker, \@from_cols, $relname_new); @@ -685,8 +889,8 @@ sub _relnames_and_method { my $remote_method = 'has_many'; # If the local columns have a UNIQUE constraint, this is a one-to-one rel - if ($self->_array_eq([ $local_source->primary_columns ], $local_cols) || - grep { $self->_array_eq($_->[1], $local_cols) } @$uniqs) { + if (array_eq([ $local_source->primary_columns ], $local_cols) || + first { array_eq($_->[1], $local_cols) } @$uniqs) { $remote_method = 'might_have'; ($local_relname) = $self->_inflect_singular($local_relname_uninflected); } @@ -716,7 +920,7 @@ sub _relnames_and_method { my $rel_cols = [ sort { $a cmp $b } apply { s/^foreign\.//i } (keys %{ $class->relationship_info($local_relname)->{cond} }) ]; - $relationship_exists = 1 if $self->_array_eq([ sort @$local_cols ], $rel_cols); + $relationship_exists = 1 if array_eq([ sort @$local_cols ], $rel_cols); } } @@ -741,9 +945,10 @@ sub _relnames_and_method { sub _rel_name_map { my ($self, $relname, $method, $local_class, $local_moniker, $local_cols, - $remote_class, $remote_moniker, $remote_cols) = @_; + $remote_class, $remote_moniker, $remote_cols, $extra) = @_; my $info = { + %{$extra || {}}, name => $relname, type => $method, local_class => $local_class,