如何确定“猫鼬模型的名称"?变异时，它不是graphql中的构造函数 [英] How to fix the "Name of the mongoose Model" is not a constructor in graphql when mutating

问题描述

在graphql游乐场中交换数据时会显示以下消息: 消息:学生不是构造函数 错误:"TypeError:学生不是构造函数" 学生是我的猫鼬模特.

Mutating data in the graphql playground says the message of Message: Student is not a constructor Error: "TypeError: Student is not a constructor" Student is my Mongoose Model.

我尝试重新安装node_modules，在github上搜索一些修复程序.

I've tried reinstalling my node_modules, searching some fix on the github.

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);

应该创建该学生，但是该消息会弹出该错误.

The student should be created, but that error pops up with that message.

推荐答案

已修复！我应该提供查询变量，而不是在graphql突变上手动输入

Fixed! I should have provided query variables rather than manual typing on the graphql mutation

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