wheeyls · August 25, 2012 21:29
diff --git a/get_products.rb b/get_products.rb
 category.posts
 #=> [] # list of all posts

 posts.categories
 #=> [] # list of all categories
diff --git a/scopes.rb b/scopes.rb
 class Post
  has_and_belongs_to_many :categories

  scope :in_categories, lambda do |cat_ids|
    joins(:categories)
      .where(id: cat_ids)
      .uniq
  end
 end
diff --git a/structure.rb b/structure.rb
 class Category
  has_and_belongs_to_many :posts
 end

 class Post
  has_and_belongs_to_many :categories
 end
	class Post
	has_and_belongs_to_many :categories

	scope :in_categories, lambda do \|cat_ids\|
	joins(:categories)
	.where(id: cat_ids)
	.uniq
	end
	end
	class Category
	has_and_belongs_to_many :posts
	end

	class Post
	has_and_belongs_to_many :categories
	end