Module: Hydra::Validations::EnumerableBehavior

Included in:
FormatValidator, InclusionValidator
Defined in:
lib/hydra/validations/enumerable_behavior.rb

Overview

EnumerableBehavior - a mixin for subclasses of ActiveModel::EachValidator adding validation for each member of an enumerable attribute value.

Behavior includes ‘fixing’ each error message to include the specific value which was invalid.

The ‘allow_empty` option can be used instead of `allow_blank` for greater clarity and precision with enumerable values. If a validator includes this mixin, an empty enumerable value will always be invalid unless `allow_empty` is true.

Note that ‘allow_nil` and `allow_blank` options apply to the enumerable value, not to its members. Thus, for example, `allow_blank: true` will not bypass validation of the value `[“”]` even though its member `“”` is blank.

Instance Method Summary collapse

Instance Method Details

#validate_each(record, attribute, value) ⇒ Object 



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# File 'lib/hydra/validations/enumerable_behavior.rb', line 22

def validate_each(record, attribute, value)
  return super unless value.respond_to?(:each)
  if value.respond_to?(:empty?) && value.empty?
    record.errors.add(attribute, "can't be empty") unless options[:allow_empty]
  else
    value.each do |v| 
      prev = record.errors[attribute].size rescue 0
      super(record, attribute, v)
      messages = record.errors[attribute]
      if messages && messages.size > prev
        record.errors.add(attribute, fixed_message(v, messages.pop))
      end
    end
  end
end