Rails duplicate validation errors when using accepts_nested_attributes_for

I have three models, Event, Address and County, that are set up like this.

class Event < ActiveRecord::Base
     has_one :address
     accepts_nested_attributes_for :address, :allow_destroy => true


     validates_presence_of :address
     validates_associated :address
end

class Address < ActiveRecord::Base
     belongs_to :county, :event


     validates_presence_of :county
     validates_associated :county
end

class County < ActiveRecord::Base
     has_many :addresses

     validates_presence_of :name, :allow_blank => false
end

They are all created thr开发者_StackOverflow中文版ough one form, and it works fine until it comes to validating them. If the county is left blank, then i get 2 validation errors:

County can't be blank
Address is invalid

I can understand why this is happening, but only need the first validation error "County can't be blank".

Any ideas on how to acheive this please?

---

Try the following:

1. In the Address model you have the helper method given below, remove it:

validates_associated :county

2. In the County model place, add the following:

validates_associated :addresses

EDIT: looks like you've hit: https://rails.lighthouseapp.com/projects/8994-ruby-on-rails/tickets/5632-validates_associated-should-be-allowed-to-not-create-an-error#ticket-5632-2

You may want to reactive that bug ...

---

Basic solution

You can try this in your view:

<% @event.errors.full_messages.each do |msg| %>
  <% unless msg.end_with?('is invalid') %>
  <li><%= msg %></li>
  <% end %>
<% end %>

But this code doesn't change errors.count on base model.

Alternative solution

You can clean up erorrs object from unnesessary errors in your controller (or whatever):

@event.errors.values.each {|v| v.delete_if{|message| message == "is invalid"} }

This code will produce this errors hash:

{:"address.county"=>["can't be blank"], :address=>[]}

So @event.errors.count will return 1 instead of 2.