如何使用 graphql 和 mongoose 进行突变

Posted 2023-03-11

【中文标题】如何使用 graphql 和 mongoose 进行突变

【英文标题】：How to do a mutation with graphql and mongoose

【发布时间】：2021-02-17 12:32:30

【问题描述】：

我有一个带有mongoose、graphql 和graphql-compose-mongoose 的后端。

我按照graphql-compose-mongoosedocumentation创建了一个User模型和schema，如下：

型号

import mongoose,  Schema  from 'mongoose';
import  composeMongoose  from 'graphql-compose-mongoose';

export const UserSchema = new Schema(
    phone:  type: String ,
    name:  type: String ,
    email:     type: String, required: true ,
    password:  type: String, required: true ,

    photos:  type: Array ,
    matchId:  type: Schema.Types.ObjectId ,

    created:  type: Date, default: Date.now ,
    active:  type: Boolean, default: false 
);

export const User = mongoose.model('User', UserSchema);
export const UserTC = composeMongoose(User);

Graphql 架构

import  User, UserTC  from '../models/User';
import  schemaComposer  from 'graphql-compose';

schemaComposer.Query.addFields(
  userById: UserTC.mongooseResolvers.findById(),
  userByIds: UserTC.mongooseResolvers.findByIds(),
  userOne: UserTC.mongooseResolvers.findOne(),
  userMany: UserTC.mongooseResolvers.findMany(),
  userDataLoader: UserTC.mongooseResolvers.dataLoader(),
  userDataLoaderMany: UserTC.mongooseResolvers.dataLoaderMany(),
  userCount: UserTC.mongooseResolvers.count(),
  userConnection: UserTC.mongooseResolvers.connection(),
  userPagination: UserTC.mongooseResolvers.pagination()
);

schemaComposer.Mutation.addFields(
  userCreateOne: UserTC.mongooseResolvers.createOne(),
  userCreateMany: UserTC.mongooseResolvers.createMany(),
  userUpdateById: UserTC.mongooseResolvers.updateById(),
  userUpdateOne: UserTC.mongooseResolvers.updateOne(),
  userUpdateMany: UserTC.mongooseResolvers.updateMany(),
  userRemoveById: UserTC.mongooseResolvers.removeById(),
  userRemoveOne: UserTC.mongooseResolvers.removeOne(),
  userRemoveMany: UserTC.mongooseResolvers.removeMany()
);

const graphqlSchema = schemaComposer.buildSchema();

export default graphqlSchema;

我想创建一个具有 userCreateOne 突变的用户，我正在 GraphQL 操场上进行尝试。我似乎无法弄清楚如何。我试过将该字段作为参数传递，但它不起作用。

【参考方案1】：

最后我确实想通了。突变看起来像这样：

mutation 
  userCreateOne(record: email: "[e-mail]", password: "12345") 
    record 
      email
      password
      matchId
      created
      active
    
  

userCreateOne（和猫鼬解析器createOne）接受一个对象record，该对象内部是您在架构中定义的字段。

【讨论】：

你知道这是为什么吗？如果有办法解决这个问题，因为使用查询不需要使用“记录”。