ActiveRecord::AttributeMethods::Read

    # File lib/active_record/attribute_methods/read.rb, line 75
75:       def read_attribute(attr_name)
76:         attr_name = attr_name.to_s
77:         attr_name = self.class.primary_key if attr_name == 'id'
78:         if !(value = @attributes[attr_name]).nil?
79:           if column = column_for_attribute(attr_name)
80:             if unserializable_attribute?(attr_name, column)
81:               unserialize_attribute(attr_name)
82:             else
83:               column.type_cast(value)
84:             end
85:           else
86:             value
87:           end
88:         else
89:           nil
90:         end
91:       end

    # File lib/active_record/attribute_methods/read.rb, line 94
94:       def unserializable_attribute?(attr_name, column)
95:         column.text? && self.class.serialized_attributes[attr_name]
96:       end

     # File lib/active_record/attribute_methods/read.rb, line 99
 99:       def unserialize_attribute(attr_name)
100:         unserialized_object = object_from_yaml(@attributes[attr_name])
101: 
102:         if unserialized_object.is_a?(self.class.serialized_attributes[attr_name]) || unserialized_object.nil?
103:           @attributes.frozen? ? unserialized_object : @attributes[attr_name] = unserialized_object
104:         else
105:           raise SerializationTypeMismatch,
106:             "#{attr_name} was supposed to be a #{self.class.serialized_attributes[attr_name]}, but was a #{unserialized_object.class.to_s}"
107:         end
108:       end

     # File lib/active_record/attribute_methods/read.rb, line 111
111:         def attribute(attribute_name)
112:           read_attribute(attribute_name)
113:         end