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