New posts in Activemodel

Rails: In Rails how to use the model’s Attribute API on a tableless model

How to create ActiveRecord tableless Model in Rails 5?

Efficient way to report record validation warnings as well as errors?

Forbidden Attributes Error in Rails 4 when encountering a situation where one would have used attr_accessible in earlier versions of Rails

Rails Undefined Method 'model_name'

on an ActiveModel Object, how do I check uniqueness?

How to test a custom validator?

Controlling the order of rails validations

Track dirty for not-persisted attribute in an ActiveRecord object in rails

How to determine if a record is just created or updated in after_save