变异时如何修复 "Name of the mongoose Model" 不是 graphql 中的构造函数

How to fix the "Name of the mongoose Model" is not a constructor in graphql when mutating

graphql playground 中的变异数据表示消息 消息:学生不是构造函数 错误:"TypeError: Student is not a constructor" 学生是我的猫鼬模型。

我已尝试重新安装我的 node_modules,在 github 上搜索一些修复程序。

这是我的变异函数

 addStudent: async (
      root,
      { studentId, firstName, lastName, email, password },
      { Student }
    ) => {
      const newStudent = await new Student({
        studentId,
        firstName,
        lastName,
        email,
        password
      }).save();
      return newStudent;
    }

这是我的猫鼬模型

const mongoose = require("mongoose");
const Schema = mongoose.Schema;

const StudentSchema = new Schema({
  studentId: {
    type: String,
    required: true
  },
  firstName: {
    type: String,
    required: true
  },
  lastName: {
    type: String,
    required: true
  },
  // sectionId: {
  //   type: [Schema.Types.ObjectId],
  //   ref: "Section",
  //   nullable: true
  // },
  email: {
    type: String,
    required: true
  },
  password: {
    type: String,
    required: true
  },
  createdDate: {
    type: Date,
    default: Date.now
  }
});

module.exports = mongoose.model("Student", StudentSchema);

应该创建学生,但该消息会弹出该错误。

Await working on promise 但这里你传递的是学生对象 所以它 returns Student 不是构造函数

const newStudent = await new Student({
        studentId,
        ....
      }).save();

相反,您可以这样做

1) 使用 append

创建学生对象
const newStudent = new Student({})
newStudent.studentId = studentId
newStudent.firstName = firstName
newStudent.lastName = lastName
newStudent.email = email
newStudent.password = password

2) 使用构造函数创建学生对象

const newStudent = new Student({ 
    studentId,
    firstName,
    lastName,
    email,
    password
})

并使用 promise async 和 await

保存
  await newStudent.save()

const newStudent = await Student.create({
    studentId,
    firstName,
    lastName,
    email,
    password
})

已修复!我应该提供查询变量而不是手动输入 graphql 突变