GraphQL错误：字段类型必须是输入类型，但实际为：

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GraphQL错误：字段类型必须是输入类型，但实际为：

这是突变的代码：

const createNotebook = mutationWithClientMutationId ({
    name: 'CreateNotebook',
    inputFields: {
        token: {
            type: GraphQLString,
        },
        details: {
            type: NotebookDetails,
        },
    },
    outputFields: {
    },
    async mutateCRNotebook(input, context) {
        const data = getJSONFromRelativeURL(input.token);
    },
});

这是突变中details字段使用的模式：

const NotebookDetails = new GraphQLObjectType({
    name: 'NotebookDetails',
    interfaces: [nodeInterface],
    fields: () => ({
        id: globalIdField('NotebookDetails'),
        description: {
            type: GraphQLString,
            description: '...',
            resolve(obj) {
                return obj.description;
            },
        },
        language: {
            type: GraphQLString,
            description: '...',
            resolve(obj) {
                return obj.language;
            },
        },
    }),
});

我在运行这段代码时遇到了错误：

api_1    | Error: CreateNotebookInput.details field type must be Input Type but got: NotebookDetails.
api_1    |     at invariant (/usr/src/app/node_modules/graphql/jsutils/invariant.js:19:11)
api_1    |     at /usr/src/app/node_modules/graphql/type/definition.js:698:58
api_1    |     at Array.forEach (native)
api_1    |     at GraphQLInputObjectType._defineFieldMap (/usr/src/app/node_modules/graphql/type/definition.js:693:16)
api_1    |     at GraphQLInputObjectType.getFields (/usr/src/app/node_modules/graphql/type/definition.js:682:49)
api_1    |     at typeMapReducer (/usr/src/app/node_modules/graphql/type/schema.js:224:26)
api_1    |     at typeMapReducer (/usr/src/app/node_modules/graphql/type/schema.js:190:12)
api_1    |     at Array.reduce (native)
api_1    |     at /usr/src/app/node_modules/graphql/type/schema.js:217:36
api_1    |     at Array.forEach (native)
api_1    |     at typeMapReducer (/usr/src/app/node_modules/graphql/type/schema.js:210:27)
api_1    |     at Array.reduce (native)
api_1    |     at new GraphQLSchema (/usr/src/app/node_modules/graphql/type/schema.js:98:34)
api_1    |     at Object. (/usr/src/app/src/schema/index.js:39:16)
api_1    |     at Module._compile (module.js:569:30)
api_1    |     at Object.Module._extensions..js (module.js:580:10)

我在查询中使用了这种语法，并且它们正常工作。 但是，它们对于突变返回错误。

我的代码有什么错误，我该如何更正？

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