activemodel_unique_error
Only add a error messages for one model attribute if this error message not exists for the model attribute
Installation
Add this line to your application's Gemfile:
gem 'activemodel_unique_errors'
And then execute:
$ bundle
Or install it yourself as:
$ gem install activemodel_unique_errors
Usage
user = User.new
user.errors.size # 0
msg = 'This error text must be uniq!'
user.errors.add(:login, msg)
user.errors.add(:login, msg)
user.errors[:login]= msg
user.errors[:login] # ['Login This error text must be uniq!'] - only one unique error for this attribute and message
user.errors.size # 1
user.errors.add(:login, 'New error message')
user.errors[:login] # ['Login This error text must be uniq!', 'Login New error message']
user.errors.size # 2Copyright
Copyright (c) 2014 soeren mothes. See LICENSE.txt for further details.