it can be accomplished with C<DBIx::Class> when necessary by resorting to
literal SQL:
- $rs->search(\[ 'YEAR(date_of_birth) = ?', [ plain_value => 1979 ] ]);
+ $rs->search(
+ \[ 'YEAR(date_of_birth) = ?', 1979 ]
+ );
# Equivalent SQL:
# SELECT * FROM employee WHERE YEAR(date_of_birth) = ?
+To include the function as part of a larger search, use the '-and' keyword
+to collect the search conditions:
+
$rs->search({ -and => [
name => 'Bob',
- \[ 'YEAR(date_of_birth) = ?', [ plain_value => 1979 ] ],
+ \[ 'YEAR(date_of_birth) = ?', 1979 ]
]});
# Equivalent SQL:
# SELECT * FROM employee WHERE name = ? AND YEAR(date_of_birth) = ?
-Note: the C<plain_value> string in the C<< [ plain_value => 1979 ] >> part
-should be either the same as the name of the column (do this if the type of the
-return value of the function is the same as the type of the column) or in the
-case of a function it's currently treated as a dummy string (it is a good idea
-to use C<plain_value> or something similar to convey intent). The value is
-currently only significant when handling special column types (BLOBs, arrays,
-etc.), but this may change in the future.
+Note: the syntax for specifying the bind value's datatype and value is
+explained in L<DBIx::Class::ResultSet/DBIC BIND VALUES>.
See also L<SQL::Abstract/Literal SQL with placeholders and bind values
(subqueries)>.
L<DBIx::Class> classes are proxy classes, therefore some different
techniques need to be employed for more than basic subclassing. In
this example we have a single user table that carries a boolean bit
-for admin. We would like like to give the admin users
+for admin. We would like to give the admin users
objects (L<DBIx::Class::Row>) the same methods as a regular user but
also special admin only methods. It doesn't make sense to create two
separate proxy-class files for this. We would be copying all the user
=head2 Filtering a relationship result set
-If you want to get a filtered result set, you can just add add to $attr as follows:
+If you want to get a filtered result set, you can just add to $attr as follows:
__PACKAGE__->has_many('pages' => 'Page', 'book', { where => { scrap => 0 } } );
To accomplish this one only needs to specify the DB schema name in the table
declaration, like so...
- package MyDatabase::Main::Artist;
+ package MyApp::Schema::Result::Artist;
use base qw/DBIx::Class::Core/;
__PACKAGE__->table('database1.artist'); # will use "database1.artist" in FROM clause
__PACKAGE__->add_columns(qw/ artist_id name /);
__PACKAGE__->set_primary_key('artist_id');
- __PACKAGE__->has_many('cds' => 'MyDatabase::Main::Cd');
+ __PACKAGE__->has_many('cds' => 'MyApp::Schema::Result::Cd');
1;
L<connection|DBIx::Class::Schama/connection> method in your Schema class and
building a renaming facility, like so:
- package MyDatabase::Schema;
+ package MyApp::Schema;
use Moose;
extends 'DBIx::Class::Schema';
1;
-By overridding the L<connection|DBIx::Class::Schama/connection>
+By overriding the L<connection|DBIx::Class::Schama/connection>
method and extracting a custom option from the provided \%attr hashref one can
then simply iterate over all the Schema's ResultSources, renaming them as
needed.
L<connection|DBIx::Class::Schama/connect>, as follows:
my $schema
- = MyDatabase::Schema->connect(
+ = MyApp::Schema->connect(
$dsn,
$user,
$pass,
numbers => [1, 2, 3]
});
- $row->update(
+ $result->update(
{
numbers => [1, 2, 3]
},
as the ORM loads all the relevant classes. This section examines
techniques for reducing the startup delay.
-These tips are are listed in order of decreasing effectiveness - so the
+These tips are listed in order of decreasing effectiveness - so the
first tip, if applicable, should have the greatest effect on your
application.