CatalystX::CRUD::ModelAdapter(3)

NAME
CatalystX::CRUD::ModelAdapter - make CRUD Controllers work with non-CRUD models

SYNOPSIS
 package My::ModelAdapter::Foo;
 use base qw( CatalystX::CRUD::ModelAdapter );

 # must implement the following methods
 sub new_object { }
 sub fetch      { }
 sub search     { }
 sub iterator   { }
 sub count      { }
 sub make_query { }
 sub search_related     { }
 sub iterator_related   { }
 sub count_related      { }

 1;

 # then in your CX::CRUD::Controller subclass
 package MyApp::Controller::CRUD;
 use base qw( CatalystX::CRUD::Controller );

 __PACKAGE__->config(
    'model_adapter' => 'My::ModelAdapter::Foo'
 );

 1;

DESCRIPTION
CatalystX::CRUD::ModelAdapter allows you to use existing, non-CRUD Models with the CatalystX::CRUD::Controller API. The ModelAdapter class implements a similar API to the CX::CRUD::Model, but does not inherit from Catalyst::Model and should not sit in the ::Model namespace.

If a 'model_adapter' config value is present in a CX::CRUD::Controller subclass, the ModelAdapter instance will be called instead of the 'model_name' instance. The model_name accessor is available on the ModelAdapter instance and is set automatically at instantiation time by the calling Controller.

This documentation is intended for ModelAdapter developers.

CONFIGURATION
You may configure your CXCM-derived Models in the usual way (see the Catalyst Manual).

METHODS
CatalystX::CRUD::ModelAdapter inherits from CatalystX::CRUD.

The following methods should be implemented in your subclass.

  new_object( controller, context )
Should return a new instance from the Model you are adapting.

  fetch( controller, context, args )
Should return an instance of the Model you are adapting, based on args.

  search( controller, context, args )
Should return an arrayref of instances of the Model you are adapting, based on args.

  iterator( controller, context, args )
Should return an iterator of instances of the Model you are adapting, based on args.

  count( controller, context, args )
Should return an integer representing the numbef of matching instances of the Model you are adapting, based on args.

  make_query( controller, context )
Should return appropriate values for passing to search(), iterator() and count(). See CataystX::CRUD::Model for examples.

  search_related( controller, context, obj, relationship )
Returns zero or more CXCO instances like search(). The instances are related to obj via relationship.

  iterator_related( controller, context, obj, relationship )
Like search_related() but returns an iterator.

  count_related( controller, context, obj, relationship )
Like search_related() but returns an integer.

  add_related( controller, context, obj, rel_name, foreign_value )
Associate foreign object identified by foreign_value with obj via the relationship rel_name.

It is up to the subclass to implement this method.

  rm_related( controller, context, obj, rel_name, foreign_value )
Dissociate foreign object identified by foreign_value from obj via the relationship rel_name.

It is up to the subclass to implement this method.

  put_related( obj, rel_name, foreign_value )
Create new related foreign object. Unlike add_related(), the foreign object need not already exist. put_related() should be idempotent.

  find_related( obj, rel_name, foreign_value )
Return related object for foreign_value based on rel_name for obj.

  has_relationship( controller, context, obj, rel_name )
Should return true or false as to whether rel_name exists for obj.

It is up to the subclass to implement this method.

CRUD Methods
The following methods are implemented in CatalystX::CRUD::Object when using the CatalystX::CRUD::Model API. When using the ModelAdapter API, they should be implemented in the adapter class.

  create( context, object )
Should implement the C in CRUD.

  read( context, object )
Should implement the R in CRUD.

  update( context, object )
Should implement the U in CRUD.

  delete( context, object )
Should implement the D in CRUD.

AUTHOR
Peter Karman, "<perl at peknet.com>"

BUGS
Please report any bugs or feature requests to "bug-catalystx-crud at rt.cpan.org", or through the web interface at <http://rt.cpan.org/NoAuth/ReportBug.html?Queue=CatalystX-CRUD>. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

SUPPORT
You can find documentation for this module with the perldoc command.

    perldoc CatalystX::CRUD

You can also look for information at:

•   Mailing List

    <https://groups.google.com/forum/#!forum/catalystxcrud>

•   AnnoCPAN: Annotated CPAN documentation

    <http://annocpan.org/dist/CatalystX-CRUD>

•   CPAN Ratings

    <http://cpanratings.perl.org/d/CatalystX-CRUD>

•   RT: CPAN's request tracker

    <http://rt.cpan.org/NoAuth/Bugs.html?Dist=CatalystX-CRUD>

•   Search CPAN

    <http://search.cpan.org/dist/CatalystX-CRUD>

COPYRIGHT & LICENSE
Copyright 2008 Peter Karman, all rights reserved.

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