can also be passed an object representing the foreign row, and the
value will be set to its primary key.
-To create related objects, pass a hashref for the value if the related
-item is a foreign key relationship (L<DBIx::Class::Relationship/belongs_to>),
-and use the name of the relationship as the key. (NOT the name of the field,
-necessarily). For C<has_many> and C<has_one> relationships, pass an arrayref
-of hashrefs containing the data for each of the rows to create in the foreign
-tables, again using the relationship name as the key.
+To create related objects, pass a hashref of related-object column values
+B<keyed on the relationship name>. If the relationship is of type C<multi>
+(L<DBIx::Class::Relationship/has_many>) - pass an arrayref of hashrefs.
+The process will correctly identify columns holding foreign keys, and will
+transparrently populate them from the keys of the corresponding relation.
+This can be applied recursively, and will work correctly for a structure
+with an arbitrary depth and width, as long as the relationships actually
+exists and the correct column data has been supplied.
+
Instead of hashrefs of plain related data (key/value pairs), you may
also pass new or inserted objects. New objects (not inserted yet, see
];
}
- if ( $attrs->{order_by} ) {
+ if ( defined $attrs->{order_by} ) {
$attrs->{order_by} = (
ref( $attrs->{order_by} ) eq 'ARRAY'
? [ @{ $attrs->{order_by} } ]
- : [ $attrs->{order_by} ]
+ : [ $attrs->{order_by} || () ]
);
}
$attrs->{group_by} = [ $attrs->{group_by} ];
}
- # If the order_by is otherwise empty - we will use this for TOP limit
- # emulation and the like.
- # Although this is needed only if the order_by is not defined, it is
- # actually cheaper to just populate this rather than properly examining
- # order_by (stuf like [ {} ] and the like)
- my $prefix = $alias . ($source->schema->storage->sql_maker->{name_sep} || '.');
- $attrs->{_virtual_order_by} = [
- map { $prefix . $_ } ($source->primary_columns)
- ];
-
$attrs->{collapse} ||= {};
if ( my $prefetch = delete $attrs->{prefetch} ) {
$prefetch = $self->_merge_attr( {}, $prefetch );
push @{ $attrs->{select} }, @{$attrs->{prefetch_select}};
push @{ $attrs->{as} }, (map { $_->[1] } @prefetch);
- push( @{ $attrs->{order_by} }, @$prefetch_ordering );
+ push( @{$attrs->{order_by}}, @$prefetch_ordering );
$attrs->{_collapse_order_by} = \@$prefetch_ordering;
}