Graphene AssertionError:在架构中找不到类型

Question

我使用graphene v2.1.8并查看this example创建这样的模式：

class Employee(graphene.Interface):
    employee_id = graphene.ID()
    employee_type = graphene.Field(lambda: EmployeeType)

    @classmethod
    def resolve_type(cls, instance, info):
        if instance.get("employee_type") == EmployeeType.PART_TIME.name:
            return PartTimeEmployee
        return FullTimeEmployee


class PartTimeEmployee(graphene.ObjectType):
    class Meta:
        interfaces = (Employee, )


class FullTimeEmployee(graphene.ObjectType):
    class Meta:
        interfaces = (Employee, )

当我对其运行查询时，出现以下错误：

AssertionError: Can't find type PartTimeEmployee in schema

我做错了什么

Answer 1

如果类型PartTimeEmployee，FullTimeEmployee没有明确提到 在查询类中-您必须手动在Schema中注册类型

schema = Schema(query=Query, types=[PartTimeEmployee, FullTimeEmployee])