Override devise registrations controller

In your form are you passing in any other attributes, via mass assignment that don't belong to your user model, or any of the nested models?

If so, I believe the ActiveRecord::UnknownAttributeError is triggered in this instance.

Otherwise, I think you can just create your own controller, by generating something like this:

# app/controllers/registrations_controller.rbclass RegistrationsController < Devise::RegistrationsController  def new    super  end  def create    # add custom create logic here  end  def update    super  endend 

And then tell devise to use that controller instead of the default with:

# app/config/routes.rbdevise_for :users, :controllers => {:registrations => "registrations"}

A better and more organized way of overriding Devise controllers and views using namespaces:

Create the following folders:

app/controllers/my_deviseapp/views/my_devise

Put all controllers that you want to override into app/controllers/my_devise and add MyDevise namespace to controller class names. Registrations example:

# app/controllers/my_devise/registrations_controller.rbclass MyDevise::RegistrationsController < Devise::RegistrationsController  ...  def create    # add custom create logic here  end  ...    end 

Change your routes accordingly:

devise_for :users,           :controllers  => {             :registrations => 'my_devise/registrations',             # ...           }

Copy all required views into app/views/my_devise from Devise gem folder or use rails generate devise:views, delete the views you are not overriding and rename devise folder to my_devise.

This way you will have everything neatly organized in two folders.

I believe there is a better solution than rewrite the RegistrationsController. I did exactly the same thing (I just have Organization instead of Company).

If you set properly your nested form, at model and view level, everything works like a charm.

My User model:

class User < ActiveRecord::Base  # Include default devise modules. Others available are:  # :token_authenticatable, :confirmable, :lockable and :timeoutable  devise :database_authenticatable, :registerable,     :recoverable, :rememberable, :trackable, :validatable  has_many :owned_organizations, :class_name => 'Organization', :foreign_key => :owner_id  has_many :organization_memberships  has_many :organizations, :through => :organization_memberships  # Setup accessible (or protected) attributes for your model  attr_accessible :email, :password, :password_confirmation, :remember_me, :name, :username, :owned_organizations_attributes  accepts_nested_attributes_for :owned_organizations  ...end

My Organization Model:

class Organization < ActiveRecord::Base  belongs_to :owner, :class_name => 'User'  has_many :organization_memberships  has_many :users, :through => :organization_memberships  has_many :contracts  attr_accessor :plan_name  after_create :set_owner_membership, :set_contract  ...end

My view : 'devise/registrations/new.html.erb'

<h2>Sign up</h2><% resource.owned_organizations.build if resource.owned_organizations.empty? %><%= form_for(resource, :as => resource_name, :url => registration_path(resource_name)) do |f| %>  <%= devise_error_messages! %>  <p><%= f.label :name %><br />    <%= f.text_field :name %></p>  <p><%= f.label :email %><br />    <%= f.text_field :email %></p>  <p><%= f.label :username %><br />    <%= f.text_field :username %></p>  <p><%= f.label :password %><br />    <%= f.password_field :password %></p>  <p><%= f.label :password_confirmation %><br />    <%= f.password_field :password_confirmation %></p>  <%= f.fields_for :owned_organizations do |organization_form| %>    <p><%= organization_form.label :name %><br />      <%= organization_form.text_field :name %></p>    <p><%= organization_form.label :subdomain %><br />      <%= organization_form.text_field :subdomain %></p>    <%= organization_form.hidden_field :plan_name, :value => params[:plan] %>  <% end %>  <p><%= f.submit "Sign up" %></p><% end %><%= render :partial => "devise/shared/links" %>