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class Topic < ActiveRecord::Base
scope :base, -> { all }
scope :written_before, lambda { |time|
if time
where "written_on < ?", time
end
}
scope :approved, -> { where(approved: true) }
scope :rejected, -> { where(approved: false) }
scope :scope_with_lambda, lambda { all }
scope :by_lifo, -> { where(author_name: "lifo") }
scope :replied, -> { where "replies_count > 0" }
scope "approved_as_string", -> { where(approved: true) }
scope :anonymous_extension, -> { all } do
def one
1
end
end
scope :with_object, Class.new(Struct.new(:klass)) {
def call
klass.where(approved: true)
end
}.new(self)
module NamedExtension
def two
2
end
end
has_many :replies, dependent: :destroy, foreign_key: "parent_id", autosave: true
has_many :approved_replies, -> { approved }, class_name: "Reply", foreign_key: "parent_id", counter_cache: "replies_count"
has_many :unique_replies, dependent: :destroy, foreign_key: "parent_id"
has_many :silly_unique_replies, dependent: :destroy, foreign_key: "parent_id"
serialize :content
before_create :default_written_on
before_destroy :destroy_children
def parent
Topic.find(parent_id)
end
# trivial method for testing Array#to_xml with :methods
def topic_id
id
end
alias_attribute :heading, :title
before_validation :before_validation_for_transaction
before_save :before_save_for_transaction
before_destroy :before_destroy_for_transaction
after_save :after_save_for_transaction
after_create :after_create_for_transaction
after_initialize :set_email_address
class_attribute :after_initialize_called
after_initialize do
self.class.after_initialize_called = true
end
def approved=(val)
@custom_approved = val
write_attribute(:approved, val)
end
protected
def default_written_on
self.written_on = Time.now unless attribute_present?("written_on")
end
def destroy_children
self.class.where("parent_id = #{id}").delete_all
end
def set_email_address
unless persisted?
self.author_email_address = "test@test.com"
end
end
def before_validation_for_transaction; end
def before_save_for_transaction; end
def before_destroy_for_transaction; end
def after_save_for_transaction; end
def after_create_for_transaction; end
end
class ImportantTopic < Topic
serialize :important, Hash
end
class DefaultRejectedTopic < Topic
default_scope -> { where(approved: false) }
end
class BlankTopic < Topic
# declared here to make sure that dynamic finder with a bang can find a model that responds to `blank?`
def blank?
true
end
end
module Web
class Topic < ActiveRecord::Base
has_many :replies, dependent: :destroy, foreign_key: "parent_id", class_name: "Web::Reply"
end
end
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