class Post < ActiveRecord::Base class CategoryPost < ActiveRecord::Base self.table_name = "categories_posts" belongs_to :category belongs_to :post end module NamedExtension def author "lifo" end end module NamedExtension2 def greeting "hullo" end end scope :containing_the_letter_a, -> { where("body LIKE '%a%'") } scope :titled_with_an_apostrophe, -> { where("title LIKE '%''%'") } scope :ranked_by_comments, -> { order("comments_count DESC") } scope :limit_by, lambda { |l| limit(l) } scope :locked, -> { lock } belongs_to :author belongs_to :readonly_author, -> { readonly }, class_name: "Author", foreign_key: :author_id belongs_to :author_with_posts, -> { includes(:posts) }, class_name: "Author", foreign_key: :author_id belongs_to :author_with_address, -> { includes(:author_address) }, class_name: "Author", foreign_key: :author_id def first_comment super.body end has_one :first_comment, -> { order("id ASC") }, class_name: "Comment" has_one :last_comment, -> { order("id desc") }, class_name: "Comment" scope :with_special_comments, -> { joins(:comments).where(comments: { type: "SpecialComment" }) } scope :with_very_special_comments, -> { joins(:comments).where(comments: { type: "VerySpecialComment" }) } scope :with_post, ->(post_id) { joins(:comments).where(comments: { post_id: post_id }) } scope :with_comments, -> { preload(:comments) } scope :with_tags, -> { preload(:taggings) } scope :tagged_with, ->(id) { joins(:taggings).where(taggings: { tag_id: id }) } scope :tagged_with_comment, ->(comment) { joins(:taggings).where(taggings: { comment: comment }) } scope :typographically_interesting, -> { containing_the_letter_a.or(titled_with_an_apostrophe) } has_many :comments do def find_most_recent order("id DESC").first end def newest created.last end def the_association proxy_association end def with_content(content) self.detect { |comment| comment.body == content } end end has_many :comments_with_extend, extend: NamedExtension, class_name: "Comment", foreign_key: "post_id" do def greeting "hello" end end has_many :comments_with_extend_2, extend: [NamedExtension, NamedExtension2], class_name: "Comment", foreign_key: "post_id" has_many :author_favorites, through: :author has_many :author_categorizations, through: :author, source: :categorizations has_many :author_addresses, through: :author has_many :author_address_extra_with_address, through: :author_with_address, source: :author_address_extra has_one :very_special_comment has_one :very_special_comment_with_post, -> { includes(:post) }, class_name: "VerySpecialComment" has_one :very_special_comment_with_post_with_joins, -> { joins(:post).order("posts.id") }, class_name: "VerySpecialComment" has_many :special_comments has_many :nonexistent_comments, -> { where "comments.id < 0" }, class_name: "Comment" has_many :special_comments_ratings, through: :special_comments, source: :ratings has_many :special_comments_ratings_taggings, through: :special_comments_ratings, source: :taggings has_many :category_posts, class_name: "CategoryPost" has_many :scategories, through: :category_posts, source: :category has_and_belongs_to_many :categories has_and_belongs_to_many :special_categories, join_table: "categories_posts", association_foreign_key: "category_id" has_many :taggings, as: :taggable, counter_cache: :tags_count has_many :tags, through: :taggings do def add_joins_and_select select("tags.*, authors.id as author_id") .joins("left outer join posts on taggings.taggable_id = posts.id left outer join authors on posts.author_id = authors.id") .to_a end end has_many :taggings_with_delete_all, class_name: "Tagging", as: :taggable, dependent: :delete_all, counter_cache: :taggings_with_delete_all_count has_many :taggings_with_destroy, class_name: "Tagging", as: :taggable, dependent: :destroy, counter_cache: :taggings_with_destroy_count has_many :tags_with_destroy, through: :taggings, source: :tag, dependent: :destroy, counter_cache: :tags_with_destroy_count has_many :tags_with_nullify, through: :taggings, source: :tag, dependent: :nullify, counter_cache: :tags_with_nullify_count has_many :misc_tags, -> { where tags: { name: "Misc" } }, through: :taggings, source: :tag has_many :funky_tags, through: :taggings, source: :tag has_many :super_tags, through: :taggings has_many :tags_with_primary_key, through: :taggings, source: :tag_with_primary_key has_one :tagging, as: :taggable has_many :first_taggings, -> { where taggings: { comment: "first" } }, as: :taggable, class_name: "Tagging" has_many :first_blue_tags, -> { where tags: { name: "Blue" } }, through: :first_taggings, source: :tag has_many :first_blue_tags_2, -> { where taggings: { comment: "first" } }, through: :taggings, source: :blue_tag has_many :invalid_taggings, -> { where "taggings.id < 0" }, as: :taggable, class_name: "Tagging" has_many :invalid_tags, through: :invalid_taggings, source: :tag has_many :categorizations, foreign_key: :category_id has_many :authors, through: :categorizations has_many :categorizations_using_author_id, primary_key: :author_id, foreign_key: :post_id, class_name: "Categorization" has_many :authors_using_author_id, through: :categorizations_using_author_id, source: :author has_many :taggings_using_author_id, primary_key: :author_id, as: :taggable, class_name: "Tagging" has_many :tags_using_author_id, through: :taggings_using_author_id, source: :tag has_many :images, as: :imageable, foreign_key: :imageable_identifier, foreign_type: :imageable_class has_one :main_image, as: :imageable, foreign_key: :imageable_identifier, foreign_type: :imageable_class, class_name: "Image" has_many :standard_categorizations, class_name: "Categorization", foreign_key: :post_id has_many :author_using_custom_pk, through: :standard_categorizations has_many :authors_using_custom_pk, through: :standard_categorizations has_many :named_categories, through: :standard_categorizations has_many :readers has_many :secure_readers has_many :readers_with_person, -> { includes(:person) }, class_name: "Reader" has_many :people, through: :readers has_many :single_people, through: :readers has_many :people_with_callbacks, source: :person, through: :readers, before_add: lambda { |owner, reader| log(:added, :before, reader.first_name) }, after_add: lambda { |owner, reader| log(:added, :after, reader.first_name) }, before_remove: lambda { |owner, reader| log(:removed, :before, reader.first_name) }, after_remove: lambda { |owner, reader| log(:removed, :after, reader.first_name) } has_many :skimmers, -> { where skimmer: true }, class_name: "Reader" has_many :impatient_people, through: :skimmers, source: :person has_many :lazy_readers has_many :lazy_readers_skimmers_or_not, -> { where(skimmer: [ true, false ]) }, class_name: "LazyReader" has_many :lazy_people, through: :lazy_readers, source: :person has_many :lazy_readers_unscope_skimmers, -> { skimmers_or_not }, class_name: "LazyReader" has_many :lazy_people_unscope_skimmers, through: :lazy_readers_unscope_skimmers, source: :person def self.top(limit) ranked_by_comments.limit_by(limit) end def self.written_by(author) where(id: author.posts.pluck(:id)) end def self.reset_log @log = [] end def self.log(message = nil, side = nil, new_record = nil) return @log if message.nil? @log << [message, side, new_record] end end class SpecialPost < Post; end class StiPost < Post self.abstract_class = true has_one :special_comment, class_name: "SpecialComment" end class SubStiPost < StiPost self.table_name = Post.table_name end class FirstPost < ActiveRecord::Base self.inheritance_column = :disabled self.table_name = "posts" default_scope { where(id: 1) } has_many :comments, foreign_key: :post_id has_one :comment, foreign_key: :post_id end class TaggedPost < Post has_many :taggings, -> { rewhere(taggable_type: "TaggedPost") }, as: :taggable has_many :tags, through: :taggings end class PostWithDefaultInclude < ActiveRecord::Base self.inheritance_column = :disabled self.table_name = "posts" default_scope { includes(:comments) } has_many :comments, foreign_key: :post_id end class PostWithSpecialCategorization < Post has_many :categorizations, foreign_key: :post_id default_scope { where(type: "PostWithSpecialCategorization").joins(:categorizations).where(categorizations: { special: true }) } end class PostWithDefaultScope < ActiveRecord::Base self.inheritance_column = :disabled self.table_name = "posts" default_scope { order(:title) } end class PostWithPreloadDefaultScope < ActiveRecord::Base self.table_name = "posts" has_many :readers, foreign_key: "post_id" default_scope { preload(:readers) } end class PostWithIncludesDefaultScope < ActiveRecord::Base self.table_name = "posts" has_many :readers, foreign_key: "post_id" default_scope { includes(:readers) } end class SpecialPostWithDefaultScope < ActiveRecord::Base self.inheritance_column = :disabled self.table_name = "posts" default_scope { where(id: [1, 5, 6]) } end class PostThatLoadsCommentsInAnAfterSaveHook < ActiveRecord::Base self.inheritance_column = :disabled self.table_name = "posts" has_many :comments, class_name: "CommentThatAutomaticallyAltersPostBody", foreign_key: :post_id after_save do |post| post.comments.load end end class PostWithAfterCreateCallback < ActiveRecord::Base self.inheritance_column = :disabled self.table_name = "posts" has_many :comments, foreign_key: :post_id after_create do |post| update_attribute(:author_id, comments.first.id) end end class PostWithCommentWithDefaultScopeReferencesAssociation < ActiveRecord::Base self.inheritance_column = :disabled self.table_name = "posts" has_many :comment_with_default_scope_references_associations, foreign_key: :post_id has_one :first_comment, class_name: "CommentWithDefaultScopeReferencesAssociation", foreign_key: :post_id end class SerializedPost < ActiveRecord::Base serialize :title end class ConditionalStiPost < Post default_scope { where(title: "Untitled") } end class SubConditionalStiPost < ConditionalStiPost end class FakeKlass extend ActiveRecord::Delegation::DelegateCache inherited self class << self def connection Post.connection end def table_name "posts" end def attribute_alias?(name) false end def sanitize_sql(sql) sql end def sanitize_sql_for_order(sql) sql end def arel_attribute(name, table) table[name] end end end