https://github.com/airblade/acts_as_parent_of

Implements the parent model code from Advanced Rails Recipe 13.
https://github.com/airblade/acts_as_parent_of

Last synced: 6 months ago
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Implements the parent model code from Advanced Rails Recipe 13.

• Host: GitHub
• URL: https://github.com/airblade/acts_as_parent_of
• Owner: airblade
• License: mit
• Created: 2008-10-28T19:46:38.000Z (almost 17 years ago)
• Default Branch: master
• Last Pushed: 2009-09-10T12:21:26.000Z (about 16 years ago)
• Last Synced: 2025-02-06T08:24:43.000Z (8 months ago)
• Language: Ruby
• Homepage:
• Size: 89.8 KB
• Stars: 2
• Watchers: 5
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.markdown
  • License: MIT-LICENSE

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README

          
# ActsAsParentOf

If you are on Rails 2.3 or above, use Rails' [nested attributes](http://guides.rubyonrails.org/2_3_release_notes.html#nested-attributes) feature.

If you are on Rails 2.2 or below, keep reading.

-----

This is lifted straight out of Advanced Rails Recipe 13, "Handle Multiple Models In One Form", by Ryan Bates.

For those using the recipe, you can save yourself some typing by adding the `acts_as_parent_of` declaration to your parent model.  For example:

    class Project < ActiveRecord::Base

      acts_as_parent_of :tasks, :budget

    end

You'll still need to write your views and controller as explained in the recipe.

## has_many versus has_one

Although the recipe assumes your parent has many children, `acts_as_parent_of` also handles the case where the parent has one child (e.g. `:budget` in the example above).  Just remember in your controller's `update` method to set the child's attributes to `nil` rather than `{}`.  For example:

    class ProjectController < ApplicationController

      def update

        params[:project][:existing_task_attributes] ||= {}

        params[:project][:budget_attributes] ||= nil

        # your normal update code etc...

      end

    end

Copyright (c) 2008 Andy Stewart (boss@airbladesoftware.com), released under the MIT license