use strict;
use warnings;
+use base 'Class::Accessor::Grouped';
+use mro 'c3';
use Carp::Clan qw/^DBIx::Class/;
-use Lingua::EN::Inflect::Number ();
-
-our $VERSION = '0.04999_10';
+use Scalar::Util 'weaken';
+use Lingua::EN::Inflect::Phrase ();
+use DBIx::Class::Schema::Loader::Utils 'split_name';
+use File::Slurp 'slurp';
+use Try::Tiny;
+use Class::Unload ();
+use Class::Inspector ();
+use List::MoreUtils 'apply';
+use namespace::clean;
+
+our $VERSION = '0.07010';
+
+# Glossary:
+#
+# remote_relname -- name of relationship from the local table referring to the remote table
+# local_relname -- name of relationship from the remote table referring to the local table
+# remote_method -- relationship type from remote table to local table, usually has_many
=head1 NAME
=head1 SYNOPSIS
-See L<DBIx::Class::Schema::Loader>
+See L<DBIx::Class::Schema::Loader> and L<DBIx::Class::Schema::Loader::Base>.
=head1 DESCRIPTION
=head2 new
-Arguments: schema_class (scalar), inflect_plural, inflect_singular
-
-C<$schema_class> should be a schema class name, where the source
-classes have already been set up and registered. Column info, primary
-key, and unique constraints will be drawn from this schema for all
-of the existing source monikers.
-
-Options inflect_plural and inflect_singular are optional, and are better documented
-in L<DBIx::Class::Schema::Loader::Base>.
+Arguments: $base object
=head2 generate_code
=cut
+__PACKAGE__->mk_group_accessors('simple', qw/
+ base
+ schema
+ inflect_plural
+ inflect_singular
+ relationship_attrs
+ rel_collision_map
+ _temp_classes
+/);
+
sub new {
- my ( $class, $schema, $inflect_pl, $inflect_singular ) = @_;
+ my ( $class, $base ) = @_;
+
+ # from old POD about this constructor:
+ # C<$schema_class> should be a schema class name, where the source
+ # classes have already been set up and registered. Column info,
+ # primary key, and unique constraints will be drawn from this
+ # schema for all of the existing source monikers.
+
+ # Options inflect_plural and inflect_singular are optional, and
+ # are better documented in L<DBIx::Class::Schema::Loader::Base>.
my $self = {
- schema => $schema,
- inflect_plural => $inflect_pl,
- inflect_singular => $inflect_singular,
+ base => $base,
+ schema => $base->schema,
+ inflect_plural => $base->inflect_plural,
+ inflect_singular => $base->inflect_singular,
+ relationship_attrs => $base->relationship_attrs,
+ rel_collision_map => $base->rel_collision_map,
+ _temp_classes => [],
};
+ weaken $self->{base}; #< don't leak
+
bless $self => $class;
- $self;
+ # validate the relationship_attrs arg
+ if( defined $self->relationship_attrs ) {
+ ref $self->relationship_attrs eq 'HASH'
+ or croak "relationship_attrs must be a hashref";
+ }
+
+ return $self;
}
sub _inflect_plural {
my ($self, $relname) = @_;
- if( ref $self->{inflect_plural} eq 'HASH' ) {
- return $self->{inflect_plural}->{$relname}
- if exists $self->{inflect_plural}->{$relname};
+ return '' if !defined $relname || $relname eq '';
+
+ if( ref $self->inflect_plural eq 'HASH' ) {
+ return $self->inflect_plural->{$relname}
+ if exists $self->inflect_plural->{$relname};
}
- elsif( ref $self->{inflect_plural} eq 'CODE' ) {
- my $inflected = $self->{inflect_plural}->($relname);
+ elsif( ref $self->inflect_plural eq 'CODE' ) {
+ my $inflected = $self->inflect_plural->($relname);
return $inflected if $inflected;
}
- return Lingua::EN::Inflect::Number::to_PL($relname);
+ return $self->_to_PL($relname);
}
# Singularize a relationship name
sub _inflect_singular {
my ($self, $relname) = @_;
- if( ref $self->{inflect_singular} eq 'HASH' ) {
- return $self->{inflect_singular}->{$relname}
- if exists $self->{inflect_singular}->{$relname};
+ return '' if !defined $relname || $relname eq '';
+
+ if( ref $self->inflect_singular eq 'HASH' ) {
+ return $self->inflect_singular->{$relname}
+ if exists $self->inflect_singular->{$relname};
}
- elsif( ref $self->{inflect_singular} eq 'CODE' ) {
- my $inflected = $self->{inflect_singular}->($relname);
+ elsif( ref $self->inflect_singular eq 'CODE' ) {
+ my $inflected = $self->inflect_singular->($relname);
return $inflected if $inflected;
}
- return Lingua::EN::Inflect::Number::to_S($relname);
+ return $self->_to_S($relname);
+}
+
+sub _to_PL {
+ my ($self, $name) = @_;
+
+ $name =~ s/_/ /g;
+ my $plural = Lingua::EN::Inflect::Phrase::to_PL($name);
+ $plural =~ s/ /_/g;
+
+ return $plural;
+}
+
+sub _to_S {
+ my ($self, $name) = @_;
+
+ $name =~ s/_/ /g;
+ my $singular = Lingua::EN::Inflect::Phrase::to_S($name);
+ $singular =~ s/ /_/g;
+
+ return $singular;
+}
+
+sub _default_relationship_attrs { +{
+ has_many => {
+ cascade_delete => 0,
+ cascade_copy => 0,
+ },
+ might_have => {
+ cascade_delete => 0,
+ cascade_copy => 0,
+ cascade_update => 0,
+ },
+ belongs_to => {
+ on_delete => 'CASCADE',
+ on_update => 'CASCADE',
+ is_deferrable => 1,
+ },
+} }
+
+# 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
+sub _relationship_attrs {
+ my ( $self, $reltype ) = @_;
+ my $r = $self->relationship_attrs;
+
+ my %composite = (
+ %{ $self->_default_relationship_attrs->{$reltype} || {} },
+ %{ $r->{all} || {} }
+ );
+
+ if( my $specific = $r->{$reltype} ) {
+ while( my ($k,$v) = each %$specific ) {
+ $composite{$k} = $v;
+ }
+ }
+ return \%composite;
}
sub _array_eq {
- my ($a, $b) = @_;
+ my ($self, $a, $b) = @_;
return unless @$a == @$b;
return 1;
}
-sub _uniq_fk_rel {
- my ($self, $local_moniker, $local_relname, $local_cols, $uniqs) = @_;
+sub _remote_attrs {
+ my ($self, $local_moniker, $local_cols) = @_;
- my $remote_method = 'has_many';
+ # get our base set of attrs from _relationship_attrs, if present
+ my $attrs = $self->_relationship_attrs('belongs_to') || {};
- # If the local columns have a UNIQUE constraint, this is a one-to-one rel
- my $local_source = $self->{schema}->source($local_moniker);
- if (_array_eq([ $local_source->primary_columns ], $local_cols) ||
- grep { _array_eq($_->[1], $local_cols) } @$uniqs) {
- $remote_method = 'might_have';
- $local_relname = $self->_inflect_singular($local_relname);
+ # If the 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;
+ $attrs->{join_type} = 'LEFT' if $nullable && !defined $attrs->{join_type};
+
+ return $attrs;
+}
+
+sub _sanitize_name {
+ my ($self, $name) = @_;
+
+ if (ref $name) {
+ # scalar ref for weird table name (like one containing a '.')
+ ($name = $$name) =~ s/\W+/_/g;
+ }
+ else {
+ # remove 'schema.' prefix if any
+ $name =~ s/^[^.]+\.//;
}
- return ($remote_method, $local_relname);
+ return $name;
}
-sub _remote_attrs {
- my ($self, $local_moniker, $local_cols) = @_;
+sub _normalize_name {
+ my ($self, $name) = @_;
- # If the referring column is nullable, make 'belongs_to' an outer join:
- my $nullable = grep { $self->{schema}->source($local_moniker)->column_info($_)->{is_nullable} }
- @$local_cols;
+ $name = $self->_sanitize_name($name);
- return $nullable ? { join_type => 'LEFT' } : ();
+ my @words = split_name $name;
+
+ return join '_', map lc, @words;
}
sub _remote_relname {
# name, to make filter accessors work, but strip trailing _id
if(scalar keys %{$cond} == 1) {
my ($col) = values %{$cond};
+ $col = $self->_normalize_name($col);
$col =~ s/_id$//;
$remote_relname = $self->_inflect_singular($col);
}
else {
- $remote_relname = $self->_inflect_singular(lc $remote_table);
+ $remote_relname = $self->_inflect_singular($self->_normalize_name($remote_table));
}
return $remote_relname;
}
+sub _resolve_relname_collision {
+ my ($self, $moniker, $cols, $relname) = @_;
+
+ return $relname if $relname eq 'id'; # this shouldn't happen, but just in case
+
+ if ($self->base->_is_result_class_method($relname)) {
+ if (my $map = $self->rel_collision_map) {
+ for my $re (keys %$map) {
+ if (my @matches = $relname =~ /$re/) {
+ return sprintf $map->{$re}, @matches;
+ }
+ }
+ }
+
+ my $new_relname = $relname;
+ while ($self->base->_is_result_class_method($new_relname)) {
+ $new_relname .= '_rel'
+ }
+
+ warn <<"EOF";
+Relationship '$relname' in source '$moniker' for columns '@{[ join ',', @$cols ]}' collides with an inherited method.
+Renaming to '$new_relname'.
+See "RELATIONSHIP NAME COLLISIONS" in perldoc DBIx::Class::Schema::Loader::Base .
+EOF
+
+ return $new_relname;
+ }
+
+ return $relname;
+}
+
sub generate_code {
my ($self, $local_moniker, $rels, $uniqs) = @_;
my $all_code = {};
- my $local_table = $self->{schema}->source($local_moniker)->from;
- my $local_class = $self->{schema}->class($local_moniker);
-
+ my $local_class = $self->schema->class($local_moniker);
+
my %counters;
foreach my $rel (@$rels) {
next if !$rel->{remote_source};
}
foreach my $rel (@$rels) {
- next if !$rel->{remote_source};
- my $local_cols = $rel->{local_columns};
- my $remote_cols = $rel->{remote_columns};
- my $remote_moniker = $rel->{remote_source};
- my $remote_obj = $self->{schema}->source($remote_moniker);
- my $remote_class = $self->{schema}->class($remote_moniker);
- my $remote_table = $remote_obj->from;
- $remote_cols ||= [ $remote_obj->primary_columns ];
+ my $remote_moniker = $rel->{remote_source}
+ or next;
+
+ my $remote_class = $self->schema->class($remote_moniker);
+ my $remote_obj = $self->schema->source($remote_moniker);
+ my $remote_cols = $rel->{remote_columns} || [ $remote_obj->primary_columns ];
+
+ my $local_cols = $rel->{local_columns};
if($#$local_cols != $#$remote_cols) {
croak "Column count mismatch: $local_moniker (@$local_cols) "
$cond{$remote_cols->[$i]} = $local_cols->[$i];
}
- my $local_relname;
- my $remote_relname = $self->_remote_relname($remote_table, \%cond);
-
- # If more than one rel between this pair of tables, use the local
- # col names to distinguish
- if($counters{$remote_moniker} > 1) {
- my $colnames = q{_} . join(q{_}, @$local_cols);
- $local_relname = $self->_inflect_plural(
- lc($local_table) . $colnames
- );
- $remote_relname .= $colnames if keys %cond > 1;
- } else {
- $local_relname = $self->_inflect_plural(lc $local_table);
- }
+ my ( $local_relname, $remote_relname, $remote_method ) =
+ $self->_relnames_and_method( $local_moniker, $rel, \%cond, $uniqs, \%counters );
- my %rev_cond = reverse %cond;
-
- for (keys %rev_cond) {
- $rev_cond{"foreign.$_"} = "self.".$rev_cond{$_};
- delete $rev_cond{$_};
- }
-
- my ($remote_method);
-
- ($remote_method, $local_relname) = $self->_uniq_fk_rel($local_moniker, $local_relname, $local_cols, $uniqs);
+ $remote_relname = $self->_resolve_relname_collision($local_moniker, $local_cols, $remote_relname);
+ $local_relname = $self->_resolve_relname_collision($remote_moniker, $remote_cols, $local_relname);
push(@{$all_code->{$local_class}},
{ method => 'belongs_to',
}
);
+ my %rev_cond = reverse %cond;
+ for (keys %rev_cond) {
+ $rev_cond{"foreign.$_"} = "self.".$rev_cond{$_};
+ delete $rev_cond{$_};
+ }
+
push(@{$all_code->{$remote_class}},
{ method => $remote_method,
args => [ $local_relname,
$local_class,
\%rev_cond,
+ $self->_relationship_attrs($remote_method),
],
}
);
return $all_code;
}
+sub _relnames_and_method {
+ my ( $self, $local_moniker, $rel, $cond, $uniqs, $counters ) = @_;
+
+ my $remote_moniker = $rel->{remote_source};
+ my $remote_obj = $self->schema->source( $remote_moniker );
+ my $remote_class = $self->schema->class( $remote_moniker );
+ my $remote_relname = $self->_remote_relname( $remote_obj->from, $cond);
+
+ my $local_cols = $rel->{local_columns};
+ my $local_table = $self->schema->source($local_moniker)->from;
+ my $local_class = $self->schema->class($local_moniker);
+ my $local_source = $self->schema->source($local_moniker);
+
+ my $local_relname_uninflected = $self->_normalize_name($local_table);
+ my $local_relname = $self->_inflect_plural($self->_normalize_name($local_table));
+
+ 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) {
+ $remote_method = 'might_have';
+ $local_relname = $self->_inflect_singular($local_relname_uninflected);
+ }
+
+ # If more than one rel between this pair of tables, use the local
+ # col names to distinguish, unless the rel was created previously.
+ if ($counters->{$remote_moniker} > 1) {
+ my $relationship_exists = 0;
+
+ if (-f (my $existing_remote_file = $self->base->get_dump_filename($remote_class))) {
+ my $class = "${remote_class}Temporary";
+
+ if (not Class::Inspector->loaded($class)) {
+ my $code = slurp $existing_remote_file;
+
+ $code =~ s/(?<=package $remote_class)/Temporary/g;
+
+ $code =~ s/__PACKAGE__->meta->make_immutable[^;]*;//g;
+
+ eval $code;
+ die $@ if $@;
+
+ push @{ $self->_temp_classes }, $class;
+ }
+
+ if ($class->has_relationship($local_relname)) {
+ 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);
+ }
+ }
+
+ if (not $relationship_exists) {
+ my $colnames = q{_} . $self->_normalize_name(join '_', @$local_cols);
+ $remote_relname .= $colnames if keys %$cond > 1;
+
+ $local_relname = $self->_normalize_name($local_table . $colnames);
+ $local_relname =~ s/_id$//;
+
+ $local_relname_uninflected = $local_relname;
+ $local_relname = $self->_inflect_plural($local_relname);
+
+ # if colnames were added and this is a might_have, re-inflect
+ if ($remote_method eq 'might_have') {
+ $local_relname = $self->_inflect_singular($local_relname_uninflected);
+ }
+ }
+ }
+
+ return ( $local_relname, $remote_relname, $remote_method );
+}
+
+sub cleanup {
+ my $self = shift;
+
+ for my $class (@{ $self->_temp_classes }) {
+ Class::Unload->unload($class);
+ }
+
+ $self->_temp_classes([]);
+}
+
=head1 AUTHOR
-See L<DBIx::Class::Schema::Loader/CONTRIBUTORS>.
+See L<DBIx::Class::Schema::Loader/AUTHOR> and L<DBIx::Class::Schema::Loader/CONTRIBUTORS>.
=head1 LICENSE
=cut
1;
+# vim:et sts=4 sw=4 tw=0:
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