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module WhyValidationsSuckIn96
# A mixin to handle specifying :if and :unless options to check before performing validation.
#
# @example Validate if a given block returns true
# setup_validations do
# validates_associated :tracks, :if => lambda { !validatable.tracks.empty? }
# end
#
# @example Validate if a given method on the validatable object returns true
# setup_validations do
# validates_associated :tracks, :if => :allow_validation
# end
#
# def allow_validation
# false
# end
#
# @example Validate unless a given block returns true
# setup_validations do
# validates_associated :tracks, :unless => lambda { validatable.tracks.empty? }
# end
#
# @example Validate unless a given method on the validatable object returns true
# setup_validations do
# validates_associated :tracks, :unless => :disallow_validation
# end
#
# def disallow_validation
# true
# end
module SkippableValidation
def validate
skip if skip_validation?
end
private
def skip
throw :validation_done, nil
end
def skip_validation?
skip_if? || skip_unless?
end
def skip_unless?
return false unless options.has_key?(:unless)
check = options[:unless].is_a?(Proc) ? instance_eval(&options[:unless]) : validatable.send(options[:unless])
check == true
end
def skip_if?
return false unless options.has_key?(:if)
check = options[:if].is_a?(Proc) ? instance_eval(&options[:if]) : validatable.send(options[:if])
check == false
end
end # SkippableValidation
end # WhyValidationsSuckIn96
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20 entries across 20 versions & 1 rubygems