如何进行GraphQL更新突变？

Question

我是GraphQL的新手。我已经有了一个添加数据的模式和变异，但是我有点纠结于如何进行更新变异来更新数据库中的现有数据。

我想我知道我可能需要做些什么来实现这一点，但我会感谢一些关于我的想法是否是正确的方法的指示。

这是我的模式，其中包含我的突变GraphQLObject。

const graphql = require("graphql");
const _ = require("lodash");
const Student = require("../models/students");
const Class = require("../models/classes");
const classes = require("../models/classes");

const {
  GraphQLObjectType,
  GraphQLString,
  GraphQLSchema,
  GraphQLID,
  GraphQLInt,
  GraphQLList,
  GraphQLNonNull,
} = graphql;

const Mutation = new GraphQLObjectType({
  name: "Mutation",
  fields: {
    addStudent: {
      type: StudentType,
      args: {
        name: { type: new GraphQLNonNull(GraphQLString) },
        age: { type: new GraphQLNonNull(GraphQLString) },
        test1: { type: new GraphQLNonNull(GraphQLString) },
        classId: { type: new GraphQLNonNull(GraphQLID) },
      },
      resolve(parent, args) {
        let student = new Student({
          name: args.name,
          age: args.age,
          test1: args.test1,
          classId: args.classId,
        });
        console.log(student);
        return student.save();
      },
    },
    addClass: {
      type: ClassType,
      args: {
        name: { type: new GraphQLNonNull(GraphQLString) },
        year: { type: new GraphQLNonNull(GraphQLString) },
      },
      resolve(parent, args) {
        let newclass = new Class({
          name: args.name,
          year: args.year,
        });
        return newclass.save();
      },
    },
    editStudent: {
      type: StudentType,
      args: {
        id: { type: new GraphQLNonNull(GraphQLID)},
        name: { type: GraphQLString },
        age: { type: GraphQLString },
        test1: { type: GraphQLString },
        classId: { type: GraphQLID },
      },
      resolve(parent, args) {
        //logic that finds the relevant data object by id, then updates that object//
        }
      }
    }
  },
});

module.exports = new GraphQLSchema({
  query: RootQuery,
  mutation: Mutation,
});

我是否正确地说，在解析函数中，我需要首先通过id在数据库中找到相关对象，然后返回任何arg已更新/更改的args？我不知道如何在MongoDB上通过id查找对象。

任何建议都将非常感谢。

Answer 1

找到了我要找的东西。

editStudent: {
      type: StudentType,
      args: {
        id: { type: new GraphQLNonNull(GraphQLID)},
        name: { type: GraphQLString },
        age: { type: GraphQLString },
        test1: { type: GraphQLString },
        classId: { type: GraphQLID },
      },
      resolve(parent, args) {
        return Student.findOneAndUpdate({_id: args.id}, { test1: args.test1, name: args.name}, { new: true})
      }