package DBIx::Class::Schema::Loader::RelBuilder;
use strict;
use warnings;
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 array_eq apply uniq/;
use Try::Tiny;
use List::Util qw/all any first/;
use namespace::clean;
use Lingua::EN::Inflect::Phrase ();
use Lingua::EN::Tagger ();
use String::ToIdentifier::EN ();
use String::ToIdentifier::EN::Unicode ();
use Class::Unload ();
use Class::Inspector ();
our $VERSION = '0.07048';
# Glossary:
#
# local_relname -- name of relationship from the local table referring to the remote table
# remote_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
DBIx::Class::Schema::Loader::RelBuilder - Builds relationships for DBIx::Class::Schema::Loader
=head1 SYNOPSIS
See L<DBIx::Class::Schema::Loader> and L<DBIx::Class::Schema::Loader::Base>.
=head1 DESCRIPTION
This class builds relationships for L<DBIx::Class::Schema::Loader>. This
is module is not (yet) for external use.
=head1 METHODS
=head2 new
Arguments: $loader object
=head2 generate_code
Arguments:
[
[ local_moniker1 (scalar), fk_info1 (arrayref), uniq_info1 (arrayref) ]
[ local_moniker2 (scalar), fk_info2 (arrayref), uniq_info2 (arrayref) ]
...
]
This generates the code for the relationships of each table.
C<local_moniker> is the moniker name of the table which had the REFERENCES
statements. The fk_info arrayref's contents should take the form:
[
{
local_table => 'some_table',
local_moniker => 'SomeTable',
local_columns => [ 'col2', 'col3' ],
remote_table => 'another_table_moniker',
remote_moniker => 'AnotherTableMoniker',
remote_columns => [ 'col5', 'col7' ],
},
{
local_table => 'some_other_table',
local_moniker => 'SomeOtherTable',
local_columns => [ 'col1', 'col4' ],
remote_table => 'yet_another_table_moniker',
remote_moniker => 'YetAnotherTableMoniker',
remote_columns => [ 'col1', 'col2' ],
},
# ...
],
The uniq_info arrayref's contents should take the form:
[
[
uniq_constraint_name => [ 'col1', 'col2' ],
],
[
another_uniq_constraint_name => [ 'col1', 'col2' ],
],
],
This method will return the generated relationships as a hashref keyed on the
class names. The values are arrayrefs of hashes containing method name and
arguments, like so:
{
'Some::Source::Class' => [
{ method => 'belongs_to', arguments => [
'col1', 'Another::Source::Class' ] },
{ method => 'has_many', arguments => [
'anothers', 'Yet::Another::Source::Class', 'col15' ] },
],
'Another::Source::Class' => [
# ...
],
# ...
}
=cut
__PACKAGE__->mk_group_accessors('simple', qw/
loader
schema
inflect_plural
inflect_singular
relationship_attrs
rel_collision_map
rel_name_map
allow_extra_m2m_cols
_temp_classes
__tagger
/);
sub new {
my ($class, $loader) = @_;
# from old POD about this constructor:
# C<$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 = {
loader => $loader,
(map { $_ => $loader->$_ } qw(
schema inflect_plural inflect_singular
relationship_attrs rel_collision_map
rel_name_map allow_extra_m2m_cols
)),
_temp_classes => [],
};
weaken $self->{loader}; #< don't leak
bless $self => $class;
# validate the relationship_attrs arg
if( defined $self->relationship_attrs ) {
(ref $self->relationship_attrs eq 'HASH' || ref $self->relationship_attrs eq 'CODE')
or croak "relationship_attrs must be a hashref or coderef";
}
return $self;
}
# pluralize a relationship name
sub _inflect_plural {
my ($self, $relname) = @_;
return '' if !defined $relname || $relname eq '';
my $result;
my $mapped = 0;
if( ref $self->inflect_plural eq 'HASH' ) {
if (exists $self->inflect_plural->{$relname}) {
$result = $self->inflect_plural->{$relname};
$mapped = 1;
}
}
elsif( ref $self->inflect_plural eq 'CODE' ) {
my $inflected = $self->inflect_plural->($relname);
if ($inflected) {
$result = $inflected;
$mapped = 1;
}
}
return ($result, $mapped) if $mapped;
return ($self->_to_PL($relname), 0);
}
# Singularize a relationship name
sub _inflect_singular {
my ($self, $relname) = @_;
return '' if !defined $relname || $relname eq '';
my $result;
my $mapped = 0;
if( ref $self->inflect_singular eq 'HASH' ) {
if (exists $self->inflect_singular->{$relname}) {
$result = $self->inflect_singular->{$relname};
$mapped = 1;
}
}
elsif( ref $self->inflect_singular eq 'CODE' ) {
my $inflected = $self->inflect_singular->($relname);
if ($inflected) {
$result = $inflected;
$mapped = 1;
}
}
return ($result, $mapped) if $mapped;
return ($self->_to_S($relname), 0);
}
sub _to_PL {
my ($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,
},
belongs_to => {
on_delete => 'CASCADE',
on_update => 'CASCADE',
is_deferrable => 1,
},
} }
# 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, $db_attrs, $params ) = @_;
my $r = $self->relationship_attrs;
my %composite = (
%{ $self->_default_relationship_attrs->{$reltype} || {} },
%{ $db_attrs || {} },
(
ref $r eq 'HASH' ? (
%{ $r->{all} || {} },
%{ $r->{$reltype} || {} },
)
:
()
),
);
if (ref $r eq 'CODE') {
$params->{attrs} = \%composite;
my %ret = %{ $r->(%$params) || {} };
%composite = %ret if %ret;
}
return %composite ? \%composite : undef;
}
sub _strip_id_postfix {
my ($self, $name) = @_;
$name =~ s/_?(?:id|ref|cd|code|num)\z//i;
return $name;
}
sub _remote_attrs {
my ($self, $local_moniker, $local_cols, $fk_attrs, $params) = @_;
# 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 any referring column is nullable, make 'belongs_to' an
# outer join, unless explicitly set by relationship_attrs
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 $attrs;
}
sub _sanitize_name {
my ($self, $name) = @_;
$name = $self->loader->_to_identifier('relationships', $name, '_');
$name =~ s/\W+/_/g; # if naming >= 8 to_identifier takes care of it
return $name;
}
sub _normalize_name {
my ($self, $name) = @_;
$name = $self->_sanitize_name($name);
my @words = split_name $name, $self->loader->_get_naming_v('relationships');
return join '_', map lc, @words;
}
sub _local_relname {
my ($self, $remote_table, $cond) = @_;
my $local_relname;
# for single-column case, set the remote relname to the column
# name, to make filter accessors work, but strip trailing _id
if(scalar keys %{$cond} == 1) {
my ($col) = values %{$cond};
$col = $self->_strip_id_postfix($self->_normalize_name($col));
($local_relname) = $self->_inflect_singular($col);
}
else {
($local_relname) = $self->_inflect_singular($self->_normalize_name($remote_table));
}
return $local_relname;
}
sub _resolve_relname_collision {
my ($self, $moniker, $cols, $relname) = @_;
return $relname if $relname eq 'id'; # this shouldn't happen, but just in case
my $table = $self->loader->moniker_to_table->{$moniker};
if ($self->loader->_is_result_class_method($relname, $table)) {
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->loader->_is_result_class_method($new_relname, $table)) {
$new_relname .= '_rel'
}
warn <<"EOF";
Relationship '$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, $tables) = @_;
# make a copy to destroy
my @tables = @$tables;
my $all_code = {};
while (my ($local_moniker, $rels, $uniqs) = @{ shift @tables || [] }) {
my $local_class = $self->schema->class($local_moniker);
my %counters;
foreach my $rel (@$rels) {
next if !$rel->{remote_source};
$counters{$rel->{remote_source}}++;
}
foreach my $rel (@$rels) {
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) "
. "$remote_moniker (@$remote_cols)";
}
my %cond;
@cond{@$remote_cols} = @$local_cols;
my ( $local_relname, $remote_relname, $remote_method ) =
$self->_relnames_and_method( $local_moniker, $rel, \%cond, $uniqs, \%counters );
my $local_method = 'belongs_to';
($local_relname) = $self->_rel_name_map(
$local_relname, $local_method,
$local_class, $local_moniker, $local_cols,
$remote_class, $remote_moniker, $remote_cols,
);
($remote_relname) = $self->_rel_name_map(
$remote_relname, $remote_method,
$remote_class, $remote_moniker, $remote_cols,
$local_class, $local_moniker, $local_cols,
);
$local_relname = $self->_resolve_relname_collision(
$local_moniker, $local_cols, $local_relname,
);
$remote_relname = $self->_resolve_relname_collision(
$remote_moniker, $remote_cols, $remote_relname,
);
my $rel_attrs_params = {
rel_name => $local_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 => [
$local_relname,
$remote_class,
\%cond,
$self->_remote_attrs($local_moniker, $local_cols, $rel->{attrs}, $rel_attrs_params),
],
extra => {
local_class => $local_class,
local_moniker => $local_moniker,
remote_moniker => $remote_moniker,
},
};
my %rev_cond = reverse %cond;
for (keys %rev_cond) {
$rev_cond{"foreign.$_"} = "self.".$rev_cond{$_};
delete $rev_cond{$_};
}
$rel_attrs_params = {
rel_name => $remote_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 => [
$remote_relname,
$local_class,
\%rev_cond,
$self->_relationship_attrs($remote_method, {}, $rel_attrs_params),
],
extra => {
local_class => $remote_class,
local_moniker => $remote_moniker,
remote_moniker => $local_moniker,
},
};
}
}
$self->_generate_m2ms($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->_cleanup;
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) = @_;
LINK_CLASS:
foreach my $link_class (sort keys %$all_code) {
my @rels = grep $_->{method} eq 'belongs_to', @{$all_code->{$link_class}};
next unless @rels == 2;
my @class;
foreach my $this (0, 1) {
my $that = $this ? 0 : 1;
my %class;
$class[$this] = \%class;
$class{local_moniker} = $rels[$this]{extra}{remote_moniker};
$class{remote_moniker} = $rels[$that]{extra}{remote_moniker};
$class{class} = $rels[$this]{args}[1];
my %link_cols = map { $_ => 1 } apply { s/^self\.//i } values %{ $rels[$this]{args}[2] };
$class{link_table_rel} = first {
$_->{method} eq 'has_many'
and
$_->{args}[1] eq $link_class
and
all { $link_cols{$_} } apply { s/^foreign\.//i } keys %{$_->{args}[2]}
} @{ $all_code->{$class{class}} };
next LINK_CLASS unless $class{link_table_rel};
$class{link_table_rel_name} = $class{link_table_rel}{args}[0];
$class{link_rel} = $rels[$that]{args}[0];
$class{from_cols} = [ apply { s/^self\.//i } values %{
$class{link_table_rel}->{args}[2]
} ];
$class{to_cols} = [ apply { s/^foreign\.//i } keys %{ $rels[$that]{args}[2] } ];
$class{from_link_cols} = [ apply { s/^self\.//i } values %{ $rels[$this]{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 array_eq(
[ sort +uniq @{$class[0]{from_link_cols}}, @{$class[1]{from_link_cols}} ],
[ sort @link_table_primary_cols ],
) && ($self->allow_extra_m2m_cols || @link_table_cols == @link_table_primary_cols);
foreach my $this (0, 1) {
my $that = $this ? 0 : 1;
($class[$this]{m2m_relname}) = $self->_rel_name_map(
($self->_inflect_plural($class[$this]{link_rel}))[0],
'many_to_many',
@{$class[$this]}{qw(class local_moniker from_cols)},
$class[$that]{class},
@{$class[$this]}{qw(remote_moniker to_cols)},
{
link_class => $link_class,
link_moniker => $link_moniker,
link_rel_name => $class[$this]{link_table_rel_name},
},
);
$class[$this]{m2m_relname} = $self->_resolve_relname_collision(
@{$class[$this]}{qw(local_moniker from_cols m2m_relname)},
);
}
for my $this (0, 1) {
my $that = $this ? 0 : 1;
push @{$all_code->{$class[$this]{class}}}, {
method => 'many_to_many',
args => [
@{$class[$this]}{qw(m2m_relname link_table_rel_name link_rel)},
$self->_relationship_attrs('many_to_many', {}, {
rel_type => 'many_to_many',
rel_name => $class[$this]{class2_relname},
local_source => $self->schema->source($class[$this]{local_moniker}),
remote_source => $self->schema->source($class[$this]{remote_moniker}),
local_table => $self->loader->class_to_table->{$class[$this]{class}},
local_cols => $class[$this]{from_cols},
remote_table => $self->loader->class_to_table->{$class[$that]{class}},
remote_cols => $class[$that]{from_cols},
}) || (),
],
extra => {
local_class => $class[$this]{class},
link_class => $link_class,
local_moniker => $class[$this]{local_moniker},
remote_moniker => $class[$this]{remote_moniker},
},
};
}
}
}
sub _duplicates {
my ($self, $rels) = @_;
my @rels = map [ $_->{args}[0] => $_ ], @$rels;
my %rel_names;
$rel_names{$_}++ foreach map $_->[0], @rels;
my @dups = grep $rel_names{$_} > 1, keys %rel_names;
my %dups;
foreach my $dup (@dups) {
$dups{$dup} = [ map $_->[1], grep { $_->[0] eq $dup } @rels ];
}
return if not %dups;
return \%dups;
}
sub _tagger {
my $self = shift;
$self->__tagger(Lingua::EN::Tagger->new) unless $self->__tagger;
return $self->__tagger;
}
sub _adjectives {
my ($self, @cols) = @_;
my @adjectives;
foreach my $col (@cols) {
my @words = split_name $col;
my $tagged = $self->_tagger->get_readable(join ' ', @words);
push @adjectives, $tagged =~ m{\G(\w+)/JJ\s+}g;
}
return @adjectives;
}
sub _name_to_identifier {
my ($self, $name) = @_;
my $to_identifier = $self->loader->naming->{force_ascii} ?
\&String::ToIdentifier::EN::to_identifier
: \&String::ToIdentifier::EN::Unicode::to_identifier;
return join '_', map lc, split_name $to_identifier->($name, '_');
}
sub _disambiguate {
my ($self, $all_code, $in_class, $dups) = @_;
DUP: foreach my $dup (keys %$dups) {
my @rels = @{ $dups->{$dup} };
# Check if there are rels to the same table name in different
# schemas/databases, if so qualify them.
my @tables = map $self->loader->moniker_to_table->{$_->{extra}{remote_moniker}},
@rels;
# databases are different, prepend database
if ($tables[0]->can('database') && (uniq map $_->database||'', @tables) > 1) {
# If any rels are in the same database, we have to distinguish by
# both schema and database.
my %db_counts;
$db_counts{$_}++ for map $_->database, @tables;
my $use_schema = any { $_ > 1 } values %db_counts;
foreach my $i (0..$#rels) {
my $rel = $rels[$i];
my $table = $tables[$i];
$rel->{args}[0] = $self->_name_to_identifier($table->database)
. ($use_schema ? ('_' . $self->name_to_identifier($table->schema)) : '')
. '_' . $rel->{args}[0];
}
next DUP;
}
# schemas are different, prepend schema
elsif ((uniq map $_->schema||'', @tables) > 1) {
foreach my $i (0..$#rels) {
my $rel = $rels[$i];
my $table = $tables[$i];
$rel->{args}[0] = $self->_name_to_identifier($table->schema)
. '_' . $rel->{args}[0];
}
next DUP;
}
foreach my $rel (@rels) {
next if $rel->{method} =~ /^(?:belongs_to|many_to_many)\z/;
my @to_cols = apply { s/^foreign\.//i }
keys %{ $rel->{args}[2] };
my @adjectives = $self->_adjectives(@to_cols);
# If there are no adjectives, and there is only one might_have
# rel to that class, we hardcode 'active'.
my $to_class = $rel->{args}[1];
if ((not @adjectives)
&& (grep { $_->{method} eq 'might_have'
&& $_->{args}[1] eq $to_class } @{ $all_code->{$in_class} }) == 1) {
@adjectives = 'active';
}
if (@adjectives) {
my $rel_name = join '_', sort(@adjectives), $rel->{args}[0];
($rel_name) = $rel->{method} eq 'might_have' ?
$self->_inflect_singular($rel_name)
:
$self->_inflect_plural($rel_name);
my ($local_class, $local_moniker, $remote_moniker)
= @{ $rel->{extra} }
{qw/local_class local_moniker remote_moniker/};
my @from_cols = apply { s/^self\.//i }
values %{ $rel->{args}[2] };
($rel_name) = $self->_rel_name_map($rel_name, $rel->{method}, $local_class, $local_moniker, \@from_cols, $to_class, $remote_moniker, \@to_cols);
$rel_name = $self->_resolve_relname_collision($local_moniker, \@from_cols, $rel_name);
$rel->{args}[0] = $rel_name;
}
}
}
# Check again for duplicates, since the heuristics above may not have resolved them all.
if ($dups = $self->_duplicates($all_code->{$in_class})) {
foreach my $dup (keys %$dups) {
# sort by method
my @rels = map $_->[1], sort { $a->[0] <=> $b->[0] } map [
{
belongs_to => 3,
has_many => 2,
might_have => 1,
many_to_many => 0,
}->{$_->{method}}, $_
], @{ $dups->{$dup} };
my $rel_num = 2;
foreach my $rel (@rels[1 .. $#rels]) {
my $inflect_type = $rel->{method} =~ /^(?:many_to_many|has_many)\z/ ?
'inflect_plural'
:
'inflect_singular';
my $inflect_method = "_$inflect_type";
my $relname_new_uninflected = $rel->{args}[0] . "_$rel_num";
$rel_num++;
my ($local_class, $local_moniker, $remote_moniker)
= @{ $rel->{extra} }
{qw/local_class local_moniker remote_moniker/};
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);
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' 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);
$rel->{args}[0] = $relname_new;
}
}
}
}
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 $local_relname = $self->_local_relname( $rel->{remote_table}, $cond);
my $local_cols = $rel->{local_columns};
my $local_table = $rel->{local_table};
my $local_class = $self->schema->class($local_moniker);
my $local_source = $self->schema->source($local_moniker);
my $remote_relname_uninflected = $self->_normalize_name($local_table);
my ($remote_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 (array_eq([ $local_source->primary_columns ], $local_cols) ||
first { array_eq($_->[1], $local_cols) } @$uniqs) {
$remote_method = 'might_have';
($remote_relname) = $self->_inflect_singular($remote_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 = $self->loader->get_dump_filename($remote_class))) {
my $class = "${remote_class}Temporary";
if (not Class::Inspector->loaded($class)) {
my $code = slurp_file $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($remote_relname)) {
my $rel_cols = [ sort { $a cmp $b } apply { s/^foreign\.//i }
(keys %{ $class->relationship_info($remote_relname)->{cond} }) ];
$relationship_exists = 1 if array_eq([ sort @$local_cols ], $rel_cols);
}
}
if (not $relationship_exists) {
my $colnames = q{_} . $self->_normalize_name(join '_', @$local_cols);
$local_relname .= $colnames if keys %$cond > 1;
$remote_relname = $self->_strip_id_postfix($self->_normalize_name($local_table . $colnames));
$remote_relname_uninflected = $remote_relname;
($remote_relname) = $self->_inflect_plural($remote_relname);
# if colnames were added and this is a might_have, re-inflect
if ($remote_method eq 'might_have') {
($remote_relname) = $self->_inflect_singular($remote_relname_uninflected);
}
}
}
return ($local_relname, $remote_relname, $remote_method);
}
sub _rel_name_map {
my ($self, $relname, $method, $local_class, $local_moniker, $local_cols,
$remote_class, $remote_moniker, $remote_cols, $extra) = @_;
my $info = {
%{$extra || {}},
name => $relname,
type => $method,
local_class => $local_class,
local_moniker => $local_moniker,
local_columns => $local_cols,
remote_class => $remote_class,
remote_moniker => $remote_moniker,
remote_columns => $remote_cols,
};
$self->_run_user_map($self->rel_name_map, $info);
}
sub _run_user_map {
my ($self, $map, $info) = @_;
my $new_name = $info->{name};
my $mapped = 0;
if ('HASH' eq ref($map)) {
my $name = $info->{name};
my $moniker = $info->{local_moniker};
if ($map->{$moniker} and 'HASH' eq ref($map->{$moniker})
and $map->{$moniker}{$name}
) {
$new_name = $map->{$moniker}{$name};
$mapped = 1;
}
elsif ($map->{$name} and not 'HASH' eq ref($map->{$name})) {
$new_name = $map->{$name};
$mapped = 1;
}
}
elsif ('CODE' eq ref($map)) {
my $cb = sub {
my ($cb_map) = @_;
croak "reentered rel_name_map must be a hashref"
unless 'HASH' eq ref($cb_map);
my ($cb_name, $cb_mapped) = $self->_run_user_map($cb_map, $info);
return $cb_mapped && $cb_name;
};
my $name = $map->($info, $cb);
if ($name) {
$new_name = $name;
$mapped = 1;
}
}
return ($new_name, $mapped);
}
sub _cleanup {
my $self = shift;
for my $class (@{ $self->_temp_classes }) {
Class::Unload->unload($class);
}
$self->_temp_classes([]);
}
=head1 AUTHORS
See L<DBIx::Class::Schema::Loader/AUTHORS>.
=head1 LICENSE
This library is free software; you can redistribute it and/or modify it under
the same terms as Perl itself.
=cut
1;
# vim:et sts=4 sw=4 tw=0: