Class: NonNilValidator

Inherits:
ActiveModel::EachValidator
  • Object
show all
Defined in:
app/validators/non_nil_validator.rb

Overview

Validates that an attribute’s value is not ‘nil`, but does allow blank, so is an alternative to `validate :attribute, presence: true` when empty should be allowed, but not `nil`.

Examples:

Validation declaration

validates :attribute,
          non_nil: true

Instance Method Summary collapse

Instance Method Details

#validate_each(model, attribute, value) ⇒ void

This method returns an undefined value.

Validates ‘value` is not `nil`. If `value` is `nil`, then the `:nil` error message is added to `attribute` on `model`.

Parameters:

  • model (#errors) —

    the ActiveModel or ActiveRecord being validated

  • attribute (Symbol) —

    the name of the attribute being validated whose value is ‘value`.

  • value (Object, nil) —

    the value of ‘attribute`.



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# File 'app/validators/non_nil_validator.rb', line 15

def validate_each(model, attribute, value)
  if value.nil?
    model.errors.add(attribute, :nil)
  end
end