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package # hide from PAUSE
DBIx::Class::Relationship::HasMany;
use strict;
use warnings;
use Try::Tiny;
use namespace::clean;
our %_pod_inherit_config =
(
class_map => { 'DBIx::Class::Relationship::HasMany' => 'DBIx::Class::Relationship' }
);
sub has_many {
my ($class, $rel, $f_class, $cond, $attrs) = @_;
unless (ref $cond) {
$class->ensure_class_loaded($f_class);
my ($pri, $too_many) = try { $class->_pri_cols }
catch {
$class->throw_exception("Can't infer join condition for ${rel} on ${class}: $_");
};
$class->throw_exception(
"has_many can only infer join for a single primary key; ".
"${class} has more"
) if $too_many;
$class->throw_exception(
"has_many needs a primary key to infer a join; ".
"${class} has none"
) if !defined $pri && (!defined $cond || !length $cond);
my ($f_key,$guess);
if (defined $cond && length $cond) {
$f_key = $cond;
$guess = "caller specified foreign key '$f_key'";
} else {
$class =~ /([^\:]+)$/;
$f_key = lc $1; # go ahead and guess; best we can do
$guess = "using our class name '$class' as foreign key";
}
my $f_class_loaded = try { $f_class->columns };
$class->throw_exception(
"No such column ${f_key} on foreign class ${f_class} ($guess)"
) if $f_class_loaded && !$f_class->has_column($f_key);
$cond = { "foreign.${f_key}" => "self.${pri}" };
}
$class->add_relationship($rel, $f_class, $cond, {
accessor => 'multi',
join_type => 'LEFT',
cascade_delete => 1,
cascade_copy => 1,
%{$attrs||{}}
});
}
1;
|
