Class: Hydra::Validations::UniquenessValidator
- Inherits:
-
ActiveModel::EachValidator
- Object
- ActiveModel::EachValidator
- Hydra::Validations::UniquenessValidator
- Defined in:
- lib/hydra/validations/uniqueness.rb
Overview
UniquenessValidator - an ActiveFedora model validator
Usage:
validates :field, uniqueness: { solr_name: "field_ssim" }
validates_uniqueness_of :field, solr_name: "field_ssim"
Restrictions:
-
Accepts only one attribute (can have more than one UniquenessValidator on a model, however)
-
:solr_name option must be present
-
Can be used on enumerable values (attribute defined with :multiple=>true option), but validator also validates single cardinality, so will not pass validation if enumerable has more than one member.
CAVEAT: The determination of uniqueness depends on a Solr query. False negatives (record invalid) may result if, for example, querying a Solr field of type “text”.
Instance Method Summary collapse
Instance Method Details
#check_validity! ⇒ Object
27 28 29 30 31 32 33 34 |
# File 'lib/hydra/validations/uniqueness.rb', line 27 def check_validity! if attributes.length > 1 raise ArgumentError, "UniquenessValidator accepts only a single attribute: #{attributes}" end unless [:solr_name].present? raise ArgumentError, "UniquenessValidator requires the :solr_name option be present." end end |
#validate_each(record, attribute, value) ⇒ Object
36 37 38 39 40 41 42 43 44 45 46 47 |
# File 'lib/hydra/validations/uniqueness.rb', line 36 def validate_each(record, attribute, value) wrapped_value = Array.wrap(value) if wrapped_value.length > 1 record.errors.add(attribute, "can't have more than one value") elsif wrapped_value.empty? record.errors.add(attribute, "can't be empty") unless [:allow_empty] else conditions = {[:solr_name] => wrapped_value.first} conditions.merge!("-id" => record.id) if record.persisted? record.errors.add attribute, "has already been taken" if record.class.exists?(conditions) end end |