How to make a required argument?

[jmn]

Apologies for writing a question in the bugtracker but I simply can not figure out how to create a required custom argument for a query. Can anyone show me how it's done?

[maarcingebala]

@jmn You should use required=True e.g.:

class Query(graphene.ObjectType):
    product = graphene.Field(
        Product, id=graphene.Argument(graphene.ID, required=True),
        description='Lookup a product by ID.')

Now when I query for the product field in the API I need to pass the id argument, as it is required to actually determine which object I should return in my resolver.