-package DBIx::Class::Relationship::HasMany;
+package # hide from PAUSE
+ DBIx::Class::Relationship::HasMany;
use strict;
use warnings;
my ($class, $rel, $f_class, $cond, $attrs) = @_;
eval "require $f_class";
+ if ($@) {
+ $class->throw_exception($@) unless $@ =~ /Can't locate/;
+ }
+
+ unless (ref $cond) {
+ my ($pri, $too_many) = $class->primary_columns;
+ $class->throw_exception( "has_many can only infer join for a single primary key; ${class} has more" )
+ if $too_many;
- if (!ref $cond) {
- my $f_key;
+ my ($f_key,$guess);
if (defined $cond && length $cond) {
$f_key = $cond;
- $class->throw( "No such column ${f_key} on foreign class ${f_class}" )
- unless ($@ || $f_class->_columns->{$f_key});
+ $guess = "caller specified foreign key '$f_key'";
} else {
$class =~ /([^\:]+)$/;
- $f_key = lc $1 if $f_class->_columns->{lc $1};
- $class->throw( "Unable to resolve foreign key for has_many from ${class} to ${f_class}" )
- unless $f_key;
+ $f_key = lc $1; # go ahead and guess; best we can do
+ $guess = "using our class name '$class' as foreign key";
}
- my ($pri, $too_many) = keys %{ $class->_primaries };
- $class->throw( "has_many can only infer join for a single primary key; ${class} has more" )
- if $too_many;
- $cond = { "foreign.${f_key}" => "self.${pri}" },
+
+ my $f_class_loaded = eval { $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||{}} } );
}