class Category < ActiveRecord::Base has_and_belongs_to_many :posts has_and_belongs_to_many :special_posts, class_name: "Post" has_and_belongs_to_many :other_posts, class_name: "Post" has_and_belongs_to_many :posts_with_authors_sorted_by_author_id, -> { includes(:authors).order("authors.id") }, class_name: "Post" has_and_belongs_to_many :select_testing_posts, -> { select "posts.*, 1 as correctness_marker" }, class_name: "Post", foreign_key: "category_id", association_foreign_key: "post_id" has_and_belongs_to_many :post_with_conditions, -> { where title: "Yet Another Testing Title" }, class_name: "Post" has_and_belongs_to_many :popular_grouped_posts, -> { group("posts.type").having("sum(comments.post_id) > 2").includes(:comments) }, class_name: "Post" has_and_belongs_to_many :posts_grouped_by_title, -> { group("title").select("title") }, class_name: "Post" def self.what_are_you "a category..." end has_many :categorizations has_many :special_categorizations has_many :post_comments, through: :posts, source: :comments has_many :authors, through: :categorizations has_many :authors_with_select, -> { select "authors.*, categorizations.post_id" }, through: :categorizations, source: :author scope :general, -> { where(name: "General") } end class SpecialCategory < Category end