class GraphQL::Schema::Validator::AllowNullValidator
Use this to specifically reject or permit ‘nil` values (given as `null` from GraphQL
).
@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, allow_null: nil, message: MESSAGE, **default_options)
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Calls superclass method
GraphQL::Schema::Validator::new
# File lib/graphql/schema/validator/allow_null_validator.rb, line 12 def initialize(allow_null_positional, allow_null: nil, message: MESSAGE, **default_options) @message = message super(**default_options) @allow_null = allow_null.nil? ? allow_null_positional : allow_null end
Public Instance Methods
validate(_object, _context, value)
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# File lib/graphql/schema/validator/allow_null_validator.rb, line 18 def validate(_object, _context, value) if value.nil? && !@allow_null @message end end