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# frozen_string_literal: true
module ActiveRecord
module AttributeMethods
module Read
extend ActiveSupport::Concern
module ClassMethods # :nodoc:
private
def define_method_attribute(name)
ActiveModel::AttributeMethods::AttrNames.define_attribute_accessor_method(
generated_attribute_methods, name
) do |temp_method_name, attr_name_expr|
generated_attribute_methods.module_eval <<-RUBY, __FILE__, __LINE__ + 1
def #{temp_method_name}
name = #{attr_name_expr}
_read_attribute(name) { |n| missing_attribute(n, caller) }
end
RUBY
end
end
end
# Returns the value of the attribute identified by <tt>attr_name</tt> after
# it has been typecast (for example, "2004-12-12" in a date column is cast
# to a date object, like Date.new(2004, 12, 12)).
def read_attribute(attr_name, &block)
name = attr_name.to_s
if self.class.attribute_alias?(name)
name = self.class.attribute_alias(name)
end
primary_key = self.class.primary_key
name = primary_key if name == "id" && primary_key
_read_attribute(name, &block)
end
# This method exists to avoid the expensive primary_key check internally, without
# breaking compatibility with the read_attribute API
def _read_attribute(attr_name, &block) # :nodoc
sync_with_transaction_state
@attributes.fetch_value(attr_name.to_s, &block)
end
alias :attribute :_read_attribute
private :attribute
end
end
end
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