spiritsc/Case-Collection-Observer

Simple notifier for object in HM and HABTM associations in AR...

== Case Collection Observer v. 0.1.0
Simple notifier for object in HM and HABTM associations in AR...

<b>Usage:</b>

* Installation
	sudo gem install SpiritSC-case_collection_observer --source http://gems.github.com/
	
* Generator:

	script/console case_observer OBSERVER_NAME MODELS_TO_OBSERVE [options]
	
	# options:
		--skip-test => Skip all tests for observer
	
<b>Rails example:</b>

- Simple construction with "has_many" association

	# "Post" and "Comment" models
		
		class Post < ActiveRecord::Base
			has_many_with_observer :comments
		end
		
		class Comment < ActiveRecord::Base
			belongs_to :post
		end
			
	# simple "Blog" observer for "Post" model
		
		class BlogObserver < ActiveRecord::Observer
			observe :post
			
			def before_save_comments(comment)
			end
			
			def after_save_comments(comment)
			end
			
			def before_destroy_comments(comment)
			end
			
			def after_destroy_comments(comment)
			end
		end
		
- Simple construction with "has_many :through" association
	
	# "Post", "Category" and "Categorization" models
		
		class Post < ActiveRecord::Base
			has_many :categorization
			has_many_with_observer :categories, :through => :categorization
		end
		
		class Category < ActiveRecord::Base
			has_many :categorization
			has_many_with_observer :posts, :through => :categorization
		end
		
		class Categorization < ActiveRecord::Base
			belongs_to :post
			belongs_to :category
		end
		
	# simple "Blog" observer for "Post" and "Category" models
		
		class BlogObserver < ActiveRecord::Observer
			observe :post, :category
			
			def before_save_posts(post)
			end
			
			def after_save_posts(post)
			end
			
			def before_destroy_posts(post)
			end
			
			def after_destroy_posts(post)
			end
			
			def before_save_categories(category)
			end
			
			def after_save_categories(category)
			end
			
			def before_destroy_categories(category)
			end
			
			def after_destroy_categories(category)
			end
		end 
		
- Simple construction with "has_and_belongs_to_many" association

	# "Post", "Category" models and "categories_posts" table
		
		class Post < ActiveRecord::Base
			has_and_belongs_to_many_with_observer :categories
		end
		
		class Category < ActiveRecord::Base
			has_and_belongs_to_many_with_observer :posts
		end
		
	# simple "Blog" observer for "Post" and "Category" models
		
		class BlogObserver < ActiveRecord::Observer
			observe :post, :category
			
			def before_save_posts(post)
			end
			
			def after_save_posts(post)
			end
			
			def before_destroy_posts(post)
			end
			
			def after_destroy_posts(post)
			end
			
			def before_save_categories(category)
			end
			
			def after_save_categories(category)
			end
			
			def before_destroy_categories(category)
			end
			
			def after_destroy_categories(category)
			end
		end
		
Copyright © 2009 Szymon Czarnecki