1 files changed, 92 insertions, 0 deletions
diff --git a/activerecord/test/models/comment.rb b/activerecord/test/models/comment.rb
new file mode 100644
index 0000000000..f0f0576709
--- /dev/null
+++ b/activerecord/test/models/comment.rb
@@ -0,0 +1,92 @@
+# frozen_string_literal: true
+
+# `counter_cache` requires association class before `attr_readonly`.
+class Post < ActiveRecord::Base; end
+
+class Comment < ActiveRecord::Base
+  scope :limit_by, lambda { |l| limit(l) }
+  scope :containing_the_letter_e, -> { where("comments.body LIKE '%e%'") }
+  scope :not_again, -> { where("comments.body NOT LIKE '%again%'") }
+  scope :for_first_post, -> { where(post_id: 1) }
+  scope :for_first_author, -> { joins(:post).where("posts.author_id" => 1) }
+  scope :created, -> { all }
+
+  belongs_to :post, counter_cache: true
+  belongs_to :author,   polymorphic: true
+  belongs_to :resource, polymorphic: true
+
+  has_many :ratings
+
+  belongs_to :first_post, foreign_key: :post_id
+  belongs_to :special_post_with_default_scope, foreign_key: :post_id
+
+  has_many :children, class_name: "Comment", foreign_key: :parent_id
+  belongs_to :parent, class_name: "Comment", counter_cache: :children_count
+
+  class ::OopsError < RuntimeError; end
+
+  module OopsExtension
+    def destroy_all(*)
+      raise OopsError
+    end
+  end
+
+  default_scope { extending OopsExtension }
+
+  scope :oops_comments, -> { extending OopsExtension }
+
+  # Should not be called if extending modules that having the method exists on an association.
+  def self.greeting
+    raise
+  end
+
+  def self.what_are_you
+    "a comment..."
+  end
+
+  def self.search_by_type(q)
+    where("#{QUOTED_TYPE} = ?", q)
+  end
+
+  def self.all_as_method
+    all
+  end
+  scope :all_as_scope, -> { all }
+
+  def to_s
+    body
+  end
+end
+
+class SpecialComment < Comment
+  default_scope { where(deleted_at: nil) }
+
+  def self.what_are_you
+    "a special comment..."
+  end
+end
+
+class SubSpecialComment < SpecialComment
+end
+
+class VerySpecialComment < Comment
+end
+
+class CommentThatAutomaticallyAltersPostBody < Comment
+  belongs_to :post, class_name: "PostThatLoadsCommentsInAnAfterSaveHook", foreign_key: :post_id
+
+  after_save do |comment|
+    comment.post.update(body: "Automatically altered")
+  end
+end
+
+class CommentWithDefaultScopeReferencesAssociation < Comment
+  default_scope -> { includes(:developer).order("developers.name").references(:developer) }
+  belongs_to :developer
+end
+
+class CommentWithAfterCreateUpdate < Comment
+  after_create do
+    update(body: "bar")
+  end
+end