method
validates_exclusion_of
Ruby on Rails latest stable (v7.1.3.2)
-
0 notes -
Class: ActiveModel::Validations::ClassMethods
- 1.0.0
- 1.1.6
- 1.2.6
- 2.0.3
- 2.1.0 (0)
- 2.2.1 (0)
- 2.3.8 (0)
- 3.0.0
- 3.0.9
- 3.1.0
- 3.2.1
- 3.2.8
- 3.2.13
- 4.0.2
- 4.1.8
- 4.2.1
- 4.2.7
- 4.2.9
- 5.0.0.1
- 5.1.7
- 5.2.3
- 6.0.0
- 6.1.3.1
- 6.1.7.7
- 7.0.0
- 7.1.3.2
- 7.1.3.4
- What's this?
validates_exclusion_of(*attr_names)
public
Validates that the value of the specified attribute is not in a particular enumerable object.
class Person < ActiveRecord::Base validates_exclusion_of :username, :in => %w( admin superuser ), :message => "You don't belong here" validates_exclusion_of :age, :in => 30..60, :message => "This site is only for under 30 and over 60" validates_exclusion_of :format, :in => %w( mov avi ), :message => "extension %s is not allowed" end
Configuration options:
- :in - An enumerable object of items that the value shouldn’t be part of
- :message - Specifies a custom error message (default is: "is reserved")
- :allow_nil - If set to true, skips this validation if the attribute is nil (default is: false)
- :allow_blank - If set to true, skips this validation if the attribute is blank (default is: false)
- :if - Specifies a method, proc or string to call to determine if the validation should occur (e.g. :if => :allow_validation, or :if => Proc.new { |user| user.signup_step > 2 }). The method, proc or string should return or evaluate to a true or false value.
- :unless - Specifies a method, proc or string to call to determine if the validation should not occur (e.g. :unless => :skip_validation, or :unless => Proc.new { |user| user.signup_step <= 2 }). The method, proc or string should return or evaluate to a true or false value.