/ 
DBIO-0.900000
/ DBIO::ResultSource::View

NAME

DBIO::ResultSource::View - ResultSource object representing a view

VERSION

version 0.900000

SYNOPSIS

package MyApp::Schema::Result::Year2000CDs;

use base qw/DBIO::Core/;

__PACKAGE__->table_class('DBIO::ResultSource::View');

__PACKAGE__->table('year2000cds');
__PACKAGE__->result_source_instance->is_virtual(1);
__PACKAGE__->result_source_instance->view_definition(
    "SELECT cdid, artist, title FROM cd WHERE year ='2000'"
);
__PACKAGE__->add_columns(
  'cdid' => {
    data_type => 'integer',
    is_auto_increment => 1,
  },
  'artist' => {
    data_type => 'integer',
  },
  'title' => {
    data_type => 'varchar',
    size      => 100,
  },
);

DESCRIPTION

View object that inherits from DBIO::ResultSource

This class extends ResultSource to add basic view support.

A view has a "view_definition", which contains a SQL query. The query can only have parameters if "is_virtual" is set to true. It may contain JOINs, sub selects and any other SQL your database supports.

View definition SQL is deployed to your database on "deploy" in DBIO::Schema unless you set "is_virtual" to true.

Deploying the view does not translate it between different database syntaxes, so be careful what you write in your view SQL.

Virtual views ("is_virtual" true), are assumed to not exist in your database as a real view. The "view_definition" in this case replaces the view name in a FROM clause in a subselect.

METHODS

is_virtual

__PACKAGE__->result_source_instance->is_virtual(1);

Set to true for a virtual view, false or unset for a real database-based view.

view_definition

__PACKAGE__->result_source_instance->view_definition(
    "SELECT cdid, artist, title FROM cd WHERE year ='2000'"
    );

An SQL query for your view. Will not be translated across database syntaxes.

deploy_depends_on

__PACKAGE__->result_source_instance->deploy_depends_on(
    ["MyApp::Schema::Result::Year","MyApp::Schema::Result::CD"]
    );

Specify the views (and only the views) that this view depends on. Pass this an array reference of fully qualified result classes.

from

Returns the FROM entry for the table (i.e. the view name) or the SQL as a subselect if this is a virtual view.

new

The constructor.

EXAMPLES

Having created the MyApp::Schema::Year2000CDs schema as shown in the SYNOPSIS above, you can then:

$2000_cds = $schema->resultset('Year2000CDs')
                   ->search()
                   ->all();
$count    = $schema->resultset('Year2000CDs')
                   ->search()
                   ->count();

If you modified the schema to include a placeholder

__PACKAGE__->result_source_instance->view_definition(
    "SELECT cdid, artist, title FROM cd WHERE year = ?"
);

and ensuring you have is_virtual set to true:

__PACKAGE__->result_source_instance->is_virtual(1);

You could now say:

$2001_cds = $schema->resultset('Year2000CDs')
                   ->search({}, { bind => [2001] })
                   ->all();
$count    = $schema->resultset('Year2000CDs')
                   ->search({}, { bind => [2001] })
                   ->count();

SQL EXAMPLES

is_virtual set to false
$schema->resultset('Year2000CDs')->all();

SELECT cdid, artist, title FROM year2000cds me
is_virtual set to true
$schema->resultset('Year2000CDs')->all();

SELECT cdid, artist, title FROM
  (SELECT cdid, artist, title FROM cd WHERE year ='2000') me

OVERRIDDEN METHODS

OTHER METHODS

AUTHOR

DBIO & DBIx::Class Authors

COPYRIGHT AND LICENSE

Copyright (C) 2026 DBIO Authors Portions Copyright (C) 2005-2025 DBIx::Class Authors Based on DBIx::Class, heavily modified.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.