32 lines
1.1 KiB
Ruby
32 lines
1.1 KiB
Ruby
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module ActiveModel
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module Validations
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# == \Active \Model Absence Validator
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class AbsenceValidator < EachValidator #:nodoc:
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def validate_each(record, attr_name, value)
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record.errors.add(attr_name, :present, options) if value.present?
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end
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end
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module HelperMethods
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# Validates that the specified attributes are blank (as defined by
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# Object#blank?). Happens by default on save.
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#
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# class Person < ActiveRecord::Base
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# validates_absence_of :first_name
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# end
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#
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# The first_name attribute must be in the object and it must be blank.
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#
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# Configuration options:
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# * <tt>:message</tt> - A custom error message (default is: "must be blank").
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#
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# There is also a list of default options supported by every validator:
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# +:if+, +:unless+, +:on+, +:allow_nil+, +:allow_blank+, and +:strict+.
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# See <tt>ActiveModel::Validations#validates</tt> for more information
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def validates_absence_of(*attr_names)
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validates_with AbsenceValidator, _merge_attributes(attr_names)
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end
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end
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end
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end
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