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method

validates_format_of

Importance_2
Ruby on Rails latest stable (v4.0.2) - 0 notes - Class: ActiveRecord::Validations::ClassMethods

Method deprecated or moved

This method is deprecated or moved on the latest stable version. The last existing version (v2.3.8) is shown here.

These similar methods exist in v4.0.2:

validates_format_of(*attr_names) public

Validates whether the value of the specified attribute is of the correct form by matching it against the regular expression provided.

  class Person < ActiveRecord::Base
    validates_format_of :email, :with => /\A([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})\Z/i, :on => :create
  end

Note: use \A and \Z to match the start and end of the string, ^ and $ match the start/end of a line.

A regular expression must be provided or else an exception will be raised.

Configuration options:

  • :message - A custom error message (default is: "is invalid").
  • :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).
  • :with - The regular expression used to validate the format with (note: must be supplied!).
  • :on - Specifies when this validation is active (default is :save, other options :create, :update).
  • :if - Specifies a method, proc or string to call to determine if the validation should occur (e.g. :if =&gt; :allow_validation, or :if =&gt; Proc.new { |user| user.signup_step &gt; 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 =&gt; :skip_validation, or :unless =&gt; Proc.new { |user| user.signup_step &lt;= 2 }). The method, proc or string should return or evaluate to a true or false value.
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