Module: DataMapper::Validations::ValidatesAbsence

### Home Classes Methods

### In Files

- lib/dm-validations/validators/absent_field_validator.rb

### Methods

- #validates_absence_of

### Files

- LICENSE
- README.rdoc

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# DataMapper::Validations::ValidatesAbsence

### Public Instance Methods

validates_absence_of(*fields) click to toggle source

Validates that the specified attribute is "blank" via the attribute's blank? method.

@note

    dm-core's support lib adds the #blank? method to many classes,

@see lib/dm-core/support/blank.rb (dm-core) for more information.

@example [Usage]

    require 'dm-validations'

    class Page
      include DataMapper::Resource

      property :unwanted_attribute, String
      property :another_unwanted, String
      property :yet_again, String

      validates_absence_of :unwanted_attribute
      validates_absence_of :another_unwanted, :yet_again

      # a call to valid? will return false unless
      # all three attributes are blank
    end

    # File lib/dm-validations/validators/absent_field_validator.rb, line 51
    def validates_absence_of(*fields)
      validators.add(AbsenceValidator, *fields)
    end

[Validate]

Generated with the Darkfish Rdoc Generator 2.