модуль ActiveRecord::AttributeMethods::PrimaryKey

# File activerecord/lib/active_record/attribute_methods/primary_key.rb, line 18
def id
  sync_with_transaction_state
  primary_key = self.class.primary_key
  _read_attribute(primary_key) if primary_key
end

# File activerecord/lib/active_record/attribute_methods/primary_key.rb, line 25
def id=(value)
  sync_with_transaction_state
  primary_key = self.class.primary_key
  _write_attribute(primary_key, value) if primary_key
end

# File activerecord/lib/active_record/attribute_methods/primary_key.rb, line 32
def id?
  sync_with_transaction_state
  query_attribute(self.class.primary_key)
end

# File activerecord/lib/active_record/attribute_methods/primary_key.rb, line 38
def id_before_type_cast
  sync_with_transaction_state
  read_attribute_before_type_cast(self.class.primary_key)
end

# File activerecord/lib/active_record/attribute_methods/primary_key.rb, line 49
def id_in_database
  sync_with_transaction_state
  attribute_in_database(self.class.primary_key)
end

# File activerecord/lib/active_record/attribute_methods/primary_key.rb, line 44
def id_was
  sync_with_transaction_state
  attribute_was(self.class.primary_key)
end

# File activerecord/lib/active_record/attribute_methods/primary_key.rb, line 12
def to_key
  key = id
  [key] if key
end