Method: Reform::Form::UniqueValidator#validate_each

Defined in:
lib/reform/form/validation/unique_validator.rb

#validate_each(form, attribute, value) ⇒ Object 



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# File 'lib/reform/form/validation/unique_validator.rb', line 32

def validate_each(form, attribute, value)
  model = form.model_for_property(attribute)

  # search for models with attribute equals to form field value
  query = model.class.where(attribute => value)

  # apply scope if options has been declared
  Array(options[:scope]).each do |field|
    # add condition to only check unique value with the same scope
    query = query.where(field => form.send(field))
  end

  # if model persisted, query may return 0 or 1 rows, else 0
  allow_count = model.persisted? ? 1 : 0
  form.errors.add(attribute, :taken) if query.count > allow_count
end