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# 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
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