UsernameNotReservedValidator

Custom validator for ActiveModel.

Validates that username is not included in the list of reserved names.

e.g:

• index
• home
• top
• ...

Installation

Add this line to your application's Gemfile:

gem 'username_not_reserved_validator'

And then execute:

$ bundle

Or install it yourself as:

$ gem install username_not_reserved_validator

Usage

validation settings

Add validation setting on your ActiveModel.

class User < ActiveRecord::Base
  validates(:name, username_not_reserved: true)
end

options

• additional_reserved_names (Array of String / default: [])
• specify additional reserved names
• case_insensitive (Boolean / default: true)
• if set to false, comparison is case sencitive
• also key case_insencitive will be accepted due to historical typo
• message (Symbol / default: :invalid)
• specify custom key of error message

e.g.)

class User < ActiveRecord::Base
  validates(:name,
            username_not_reserved: {
              additional_reserved_names: %w[foo bar],
              case_insensitive: true,
              message: :reserved_username
            }
           )
end

Referenced resources

• http://qiita.com/phimcall/items/4c559b70f70ea7f1953b
• http://bitarts.jp/blog/archives/004363.html
• https://github.com/balexand/email_validator

With tons of thanks 🍣