Flowdock
method

validates_absence_of

Importance_1
v4.0.2 - Show latest stable - 0 notes - Class: ActiveModel::Validations::HelperMethods
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validates_absence_of(*attr_names) public

Validates that the specified attributes are blank (as defined by Object#blank?). Happens by default on save.

class Person < ActiveRecord::Base
  validates_absence_of :first_name
end

The first_name attribute must be in the object and it must be blank.

Configuration options:

  • :message - A custom error message (default is: “must be blank”).

There is also a list of default options supported by every validator: :if, :unless, :on and :strict. See ActiveModel::Validation#validates for more information

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