Rails 5 Attributes from Active Record to Active Model

Mohit Natoo

By Mohit Natoo

on May 17, 2016

This blog is part of our  Rails 5 series.

Before Rails 5, we could use assign_attributes and have bulk assignment of attributes only for objects whose classes are inherited from ActiveRecord::Base class.

In Rails 5 we can make use of assign_attributes method and have bulk assignment of attributes even for objects whose classes are not inherited from ActiveRecord::Base.

This is possible because the attributes assignment code is now moved from ActiveRecord::AttributeAssignment to ActiveModel::AttributeAssignment module.

To have this up and running, we need to include ActiveModel::AttributeAssignment module to our class.

2class User
3  include ActiveModel::AttributeAssignment
4  attr_accessor :email, :first_name, :last_name
7user = User.new
8user.assign_attributes({email:      'sam@example.com',
9                        first_name: 'Sam',
10                        last_name:  'Smith'})
11> user.email
12#=> "sam@example.com"
13> user.first_name
14#=> "Sam"

If you liked this blog, you might also like the other blogs we have written. Check out the full archive.

Stay up to date with our blogs. Sign up for our newsletter.

We write about Ruby on Rails, React.js, React Native, remote work,open source, engineering & design.