class GraphQL::Schema::Validator::AllowNullValidator

Use this to specifically reject or permit nil values (given as null from GraphQL).

Examples

Example: require a non-null value for an argument if it is provided

argument :name, String, required: false, validates: { allow_null: false }

Constants

MESSAGE

Public Class Methods

new (allow_null_positional = nil, allow_null: nil, message: MESSAGE, **default_options)

Source

# File lib/graphql/schema/validator/allow_null_validator.rb, line 18
def initialize(allow_null_positional = nil, allow_null: nil, message: MESSAGE, **default_options)
  @message = message
  super(**default_options)
  @allow_null = allow_null.nil? ? allow_null_positional : allow_null
end

Calls superclass method GraphQL::Schema::Validator::new

Public Instance Methods

validate (_object, _context, value)

Source

# File lib/graphql/schema/validator/allow_null_validator.rb, line 24
def validate(_object, _context, value)
  if value.nil? && !validation_parameter(@allow_null)
    validation_parameter(@message)
  end
end