AssociationTypeMismatch (Object expected, got HashWithIndifferentAccess) in Rails app

Question

I\'m getting a AssociationTypeMismatch Error and I\'m not sure where I\'m making a mistake. I\'m pretty new to Rails so I\'m guessing I\'m making some silly mistake. I\'ve check

Answer 1

Give a shot.

In your User model, try to add :preference_attributes to your attr_accessible line.

class User < ActiveRecord::Base
  attr_accessible :email, :full_name, :password, :password_confirmation, :preference_attributes
  .. # rest of your code goes here
end

Answer 2

it is:

attr_accessible :preference_attributes

and in your form:

<%= f.fields_for :preference_attributes do |builder| %>
...