Node.js 如何解决GraphQL循环引用？

我正在尝试将我的类型分离到单独的文件中。通过这样做，我发现任何引用usertype的类型定义都会出现以下错误。 用户：

许可证：

const {
  GraphQLObjectType,
  GraphQLInt,
  GraphQLString,
  GraphQLBoolean,
  GraphQLID,
} = require("graphql");

const UserType = require("../types/userType");
const UserController = require("../../controllers/userController");

const LicenseType = new GraphQLObjectType({
  name: "License",
  fields: () => ({
    _id: { type: GraphQLID },
    token: { type: GraphQLString },
    creationDate: { type: GraphQLString },
    expirationDate: { type: GraphQLString },
    btcAddress: { type: GraphQLString },
    sessions: { type: GraphQLInt },
    active: { type: GraphQLBoolean },
    user_id: { type: GraphQLID },
    user: {
      type: UserType,
      async resolve(parent, args) {
        return await UserController.getSingleUser({ id: parent.user_id });
      },
    },
  }),
});

module.exports = LicenseType;

错误：

Error: One of the provided types for building the Schema is missing a name.

---

我已尝试将类型/控制器定义移动到类型定义的上方和下方，但未做任何更改。如何从许可证类型中提供用户数据？

您可以将

require

调用移动到

字段

函数中——这样，在构建模式时实际调用函数之前，不会对它们进行评估

const LicenseType = new GraphQLObjectType({
  name: "License",
  fields: () => {
    const UserType = require("../types/userType");
    const UserController = require("../../controllers/userController");

    return {
      _id: { type: GraphQLID },
      token: { type: GraphQLString },
      creationDate: { type: GraphQLString },
      expirationDate: { type: GraphQLString },
      btcAddress: { type: GraphQLString },
      sessions: { type: GraphQLInt },
      active: { type: GraphQLBoolean },
      user_id: { type: GraphQLID },
      user: {
        type: UserType,
        async resolve(parent, args) {
          return await UserController.getSingleUser({ id: parent.user_id });
        },
      },
    }
  },
});

---

您可以将

require

调用移动到

字段

函数中——这样，在构建模式时实际调用函数之前，不会对调用进行计算

const LicenseType = new GraphQLObjectType({
  name: "License",
  fields: () => {
    const UserType = require("../types/userType");
    const UserController = require("../../controllers/userController");

    return {
      _id: { type: GraphQLID },
      token: { type: GraphQLString },
      creationDate: { type: GraphQLString },
      expirationDate: { type: GraphQLString },
      btcAddress: { type: GraphQLString },
      sessions: { type: GraphQLInt },
      active: { type: GraphQLBoolean },
      user_id: { type: GraphQLID },
      user: {
        type: UserType,
        async resolve(parent, args) {
          return await UserController.getSingleUser({ id: parent.user_id });
        },
      },
    }
  },
});