Returns the value of the attribute identified by attr_name after it has been typecast (for example, “2004-12-12” in a data column is cast to a date object, like Date.new(2004, 12, 12)).
# File lib/active_record/attribute_methods/read.rb, line 75 def read_attribute(attr_name) attr_name = attr_name.to_s attr_name = self.class.primary_key if attr_name == 'id' value = @attributes[attr_name] unless value.nil? if column = column_for_attribute(attr_name) if unserializable_attribute?(attr_name, column) unserialize_attribute(attr_name) else column.type_cast(value) end else value end else nil end end
Returns true if the attribute is of a text column and marked for serialization.
# File lib/active_record/attribute_methods/read.rb, line 95 def unserializable_attribute?(attr_name, column) column.text? && self.class.serialized_attributes[attr_name] end
Returns the unserialized object of the attribute.
# File lib/active_record/attribute_methods/read.rb, line 100 def unserialize_attribute(attr_name) unserialized_object = object_from_yaml(@attributes[attr_name]) if unserialized_object.is_a?(self.class.serialized_attributes[attr_name]) || unserialized_object.nil? @attributes.frozen? ? unserialized_object : @attributes[attr_name] = unserialized_object else raise SerializationTypeMismatch, "#{attr_name} was supposed to be a #{self.class.serialized_attributes[attr_name]}, but was a #{unserialized_object.class.to_s}" end end
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