Question

I have an Account model with the following :

has_one :primary_user, :class_name => "User", :conditions => "role = 'primary_user'"

So @account.primary_user looks for a user with a role of primary_user.

When creating a new account, I want to be able to create a new primary_user. What is the “Rails way” to do that ?

Do I need to create a primary_user= method?

Here is my create form ..

<%= semantic_form_for @account do |f| %>
    <%= f.input :account_name %>

    <%= f.semantic_fields_for :primary_user do |user| %>
      <%= user.input :email %>
   <% end %>
<% end %>

If I submit this form I get

ActiveRecord::AssociationTypeMismatch (User(#2159789500) expected, got ActiveSupport::HashWithIndifferentAccess(#2159703820)):

Thanks

Answer 1

Little cleaner:

has_one :primary_user, :class_name => "User", :conditions => { :role => "primary_user" }

Then straight solution:

<%= semantic_form_for @account do |f| %>
    <%= f.input :account_name %>

    <%= f.semantic_fields_for :primary_user, primary_user || build_primary_user do |user| %>
      <%= user.input :email %>
   <% end %>
<% end %>

But I suggest you to add this into new action in controller

@account.build_primary_user