class GraphQL::InvalidNullError

for a non-null field.
Raised automatically when a field’s resolve function returns ‘nil`

def initialize(parent_type, field, value) 

def initialize(parent_type, field, value)
  @parent_type = parent_type
  @field = field
  @value = value
  super("Cannot return null for non-nullable field #{@parent_type.graphql_name}.#{@field.graphql_name}")
end

def inspect 

def inspect
  if (name.nil? || parent_class.name.nil?) && parent_class.respond_to?(:mutation) && (mutation = parent_class.mutation)
    "#{mutation.inspect}::#{parent_class.graphql_name}::InvalidNullError"
  else
    super
  end
end

def parent_error?

Deprecated:
  • always false
def parent_error?
  false
end

def subclass_for(parent_class) 

def subclass_for(parent_class)
  subclass = Class.new(self)
  subclass.parent_class = parent_class
  subclass
end

def to_h

Returns:
  • (Hash) - An entry for the response's "errors" key 
def to_h
  { "message" => message }
end