The following will B<not> work:
my $rs = $schema->resultset('CD')->search({
- artist_id => $inside_rs->get_column('id')->as_query,
+ artist_id => $inside_rs->get_column('id')->as_query, # does NOT work
});
=head3 Support
$rs->search({ 'YEAR(date_of_birth)' => 1979 });
-With quoting on, or for a more portable solution, use the C<where>
-attribute:
+With quoting on, or for a more portable solution, use literal SQL values with
+placeholders:
- $rs->search({}, { where => \'YEAR(date_of_birth) = 1979' });
+ $rs->search(\[ 'YEAR(date_of_birth)', [ dummy => 1979 ] ]);
-=begin hidden
-
-(When the bind args ordering bug is fixed, this technique will be better
-and can replace the one above.)
-
-With quoting on, or for a more portable solution, use the C<where> and
-C<bind> attributes:
+ # Equivalent SQL:
+ # SELECT * FROM employee WHERE YEAR(date_of_birth) = ?
- $rs->search({}, {
- where => \'YEAR(date_of_birth) = ?',
- bind => [ 1979 ]
+ $rs->search({
+ name => 'Bob',
+ -nest => \[ 'YEAR(date_of_birth)', [ dummy => 1979 ] ],
});
-=end hidden
+ # Equivalent SQL:
+ # SELECT * FROM employee WHERE name = ? AND YEAR(date_of_birth) = ?
+
+See also L<SQL::Abstract/Literal SQL with placeholders and bind values
+(subqueries)>.
=head1 JOINS AND PREFETCHING
### The statement below will print
print "I can do admin stuff\n" if $admin->can('do_admin_stuff');
+Alternatively you can use L<DBIx::Class::DynamicSubclass> that implements
+exactly the above functionality.
+
=head2 Skip row object creation for faster results
DBIx::Class is not built for speed, it's built for convenience and
To order C<< $book->pages >> by descending page_number, create the relation
as follows:
- __PACKAGE__->has_many('pages' => 'Page', 'book', { order_by => \'page_number DESC'} );
+ __PACKAGE__->has_many('pages' => 'Page', 'book', { order_by => { -desc => 'page_number'} } );
=head2 Filtering a relationship result set