Module: ActiveModel::Validations::HelperMethods

Defined in:
lib/flag_shih_tzu/validators.rb

Overview

Use these validators in your model

Instance Method Summary collapse

Instance Method Details

#validates_presence_of_flags(*attr_names) ⇒ Object

Validates that the specified attributes are flags and are not blank.
Happens by default on save. Example:

class Spaceship < ActiveRecord::Base
include FlagShihTzu

has_flags({ 1 => :warpdrive, 2 => :hyperspace }, :column => ‘engines’)
validates_presence_of_flags :engines
end

The engines attribute must be a flag in the object and it cannot be blank.

Configuration options:

  • :message - A custom error message (default is: “can’t be blank”).
  • :on - Specifies when this validation is active. Runs in all
    validation contexts by default (+nil+), other options are :create
    and :update.
  • :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 { |spaceship| spaceship.warp_step <= 2 }). The method,
    proc or string should return or evaluate to a true or false value.
  • :strict - Specifies whether validation should be strict.
    See ActiveModel::Validation#validates! for more information.


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# File 'lib/flag_shih_tzu/validators.rb', line 66

def validates_presence_of_flags(*attr_names)
  validates_with(PresenceOfFlagsValidator, _merge_attributes(attr_names))
end