Allow error messages without attribute name. Improve enterprise relationship error message.

Gemfile

@@ -35,6 +35,7 @@ gem 'geocoder'
 gem 'gmaps4rails'
 gem 'spinjs-rails'
 gem 'rack-ssl', :require => 'rack/ssl'
+gem 'custom_error_message', :github => 'jeremydurham/custom-err-msg'
 
 gem 'foreigner'
 gem 'immigrant'

Gemfile.lock

@@ -6,6 +6,12 @@ GIT
       actionpack (~> 3.0)
       activemodel (~> 3.0)
 
+GIT
+  remote: git://github.com/jeremydurham/custom-err-msg.git
+  revision: 3a8ec9dddc7a5b0aab7c69a6060596de300c68f4
+  specs:
+    custom_error_message (1.1.1)
+
 GIT
   remote: git://github.com/openfoodfoundation/spree.git
   revision: da651b40f5c6cdd32e00b060729eb9aefd4f615f
@@ -492,6 +498,7 @@ DEPENDENCIES
   coffee-rails (~> 3.2.1)
   comfortable_mexican_sofa
   compass-rails
+  custom_error_message!
   database_cleaner (= 0.7.1)
   db2fog
   debugger-linecache

app/models/enterprise_relationship.rb

@@ -3,7 +3,7 @@ class EnterpriseRelationship < ActiveRecord::Base
   belongs_to :child, class_name: 'Enterprise'
 
   validates_presence_of :parent_id, :child_id
-  validates_uniqueness_of :child_id, scope: :parent_id
+  validates_uniqueness_of :child_id, scope: :parent_id, message: "^That relationship is already established."
 
   scope :with_enterprises,
     joins('LEFT JOIN enterprises AS parent_enterprises ON parent_enterprises.id = enterprise_relationships.parent_id').