如何从猫鼬模型制作graphql？
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【中文标题】如何从猫鼬模型制作graphql？【英文标题】：how to make graphql from model of mongoose? 【发布时间】：2021-04-23 22:08:15 【问题描述】：我正在使用 graphql 和 mongodb 将某个对象添加到数据库中。
我正在使用相同的技术向数据库添加一个对象，但是这个特定对象包含一个嵌套对象。
package.json
"name": "workplaces",
"version": "1.0.0",
"main": "app.js",
"author": "younes",
"license": "MIT",
"scripts":
"start": "nodemon app02.js"
,
"dependencies":
"bcryptjs": "^2.4.3",
"body-parser": "^1.19.0",
"express": "^4.17.1",
"express-graphql": "^0.12.0",
"graphql": "^15.4.0",
"mongoose": "^5.11.12"
,
"devDependencies":
"nodemon": "^2.0.7"
const mongoose = require('mongoose');
const Schema = mongoose.Schema;
const locationSchema = new Schema(
locationName:[
lang:
type: String,
enum:["en","fr"],
required: true
,
text:
type: String,
required: true
],
locationType:
type:String,
enum:["clinic","laboratory","radiology"],
required: true
,
imageUrl:
type:[String]
,
locationMap:
type:
type: String,
enum: ['Point'],
required: true
,
coordinates:
type: [Number],
required: true
,
,
owner:
type: Schema.Types.ObjectId,
ref: 'User'
,
timestamps: true,
);
module.exports = mongoose.model('location', locationSchema);
const express=require('express');
const graphqlHTTP=require('express-graphql').graphqlHTTP;
const buildSchema=require('graphql');
const mongoose=require('mongoose');
const bcrypt=require('bcryptjs');
const User=require('./models/user');
const Location=require('./models/location');
const app=express();
app.use(express.json());
app.use('/graphql',
graphqlHTTP(
schema:buildSchema(`
type LocationName
lang:String!
text:String!
input InputLocationName
lang:String!
text:String!
type LocationMap
type:String!
coordinates:[Float!]
input InputLocationMap
type:String!
coordinates:[Float!]
type Location
_id:ID!
locationName:[LocationName!]
locationType:String!
imageUrl:[String!]
locationMap:LocationMap!
owner:User!
input InputLocation
locationName:[LocationName!]!
locationType:String!
imageUrl:[String!]
locationMap:LocationMap!
type User
_id:ID!
email:String!
password:String
input InputUser
email:String!
password:String!
type RootQuery
users:[User!]!
locations: [Location!]!
type RootMutation
createUser(inputUser:InputUser): User
createLocation(inputLocation:InputLocation): Location
schema
query: RootQuery
mutation: RootMutation
`),
rootValue:
users:()=>
return User.find()
.then(users=>
console.log(users)
return users
)
.catch(err=>
throw err;
)
,
createLocation:(args)=>
return User.findOne(_id:"6002cff9d32ceb25ac9e9c7e")
.then(user=>
if (!user)
throw new Error('User dont found.')
else
const location=new Location(
locationName:args.inputLocation.LocationName ,
locationType:args.inputLocation.locationType,
imageUrl:args.inputLocation.imageUrl,
locationMap:args.inputLocation.LocationMap,
owner:"6002cff9d32ceb25ac9e9c7e"
);
return location
.save()
.then(result=>
console.log(result)
return result
)
.catch((err)=>
throw err;
)
)
,
createUser:(args)=>
return User.findOne(email:args.userInput.email)
.then(user=>
if (user)
throw new Error('User exists already.')
else
return bcrypt
.hash(args.userInput.password,12)
.then(hashPassword=>
const user=new User(
email:args.userInput.email,
password:hashPassword
);
return user
.save()
.then(result=>
return ...result._doc,password:null
)
.catch((err)=>throw err;)
)
.catch((err)=>
throw err;
)
)
,
,
graphiql:true
)
);
uri=process.env.URI
mongoose.connect(uri,
useNewUrlParser:true
,useCreateIndex:true
, useUnifiedTopology:true
)
.then(()=>
console.log("database connected")
app.listen(5000);
)
.catch((err)=>
console.log(err)
)
mutation
createLocation(inputLocation:
locationName:[lang:"en",text:"sad",isShow:true],
locationType:"clinic",
imageUrl:["/images/01.png"],
locationMap:
type:"Point",
coordinates:[2342342,2342345]
)
_id
错误
"errors": [
"message": "The type of InputLocation.locationName must be Input Type but got: [LocationName!]!.",
"locations": [
"line": 33,
"column": 30
]
,
"message": "The type of InputLocation.locationMap must be Input Type but got: LocationMap!.",
"locations": [
"line": 37,
"column": 29
]
]
请帮忙，谢谢！
【问题讨论】：
input InputLocation 中的任何复杂类型都应该是输入类型
【参考方案1】：
graphql
const express=require('express');
const graphqlHTTP=require('express-graphql').graphqlHTTP;
const buildSchema=require('graphql');
const mongoose=require('mongoose');
const bcrypt=require('bcryptjs');
const User=require('./models/user');
const Location=require('./models/location');
const app=express();
app.use(express.json());
app.use('/graphql',
graphqlHTTP(
schema:buildSchema(`
type LocationName
lang:String!
text:String!
input InputLocationName
lang:String!
text:String!
type LocationMap
type:String!
coordinates:[Float!]
input InputLocationMap
type:String!
coordinates:[Float!]!
type Location
_id:ID!
locationName:[LocationName!]!
locationType:String!
imageUrl:[String!]
locationMap:LocationMap!
owner:User!
input InputLocation_otherItems
locationType:String!
imageUrl:[String!]
type User
_id:ID!
email:String!
password:String
input InputUser
email:String!
password:String!
type RootQuery
users:[User!]!
locations: [Location!]!
type RootMutation
createUser(inputUser:InputUser): User
createLocation( inputLocation_otherItems:InputLocation_otherItems
inputLocationName:InputLocationName
inputLocationMap:InputLocationMap): Location
schema
query: RootQuery
mutation: RootMutation
`),
rootValue:
users:()=>
return User.find()
.then(users=>
console.log(users)
return users
)
.catch(err=>
throw err;
)
,
createLocation:(args)=>
return User.findOne(_id:"6002cff9d32ceb25ac9e9c7e")
.then(user=>
if (!user)
throw new Error('User dont found.')
else
const location=new Location(
locationType:args.inputLocation_otherItems.locationType,
imageUrl:args.inputLocation_otherItems.imageUrl,
locationName:[args.inputLocationName] ,
locationMap:args.inputLocationMap,
owner:"6002cff9d32ceb25ac9e9c7e"
);
return location
.save()
.then(result=>
return result
)
.catch((err)=>
throw err;
)
)
,
createUser:(args)=>
return User.findOne(email:args.userInput.email)
.then(user=>
if (user)
throw new Error('User exists already.')
else
return bcrypt
.hash(args.userInput.password,12)
.then(hashPassword=>
const user=new User(
email:args.userInput.email,
password:hashPassword
);
return user
.save()
.then(result=>
return ...result._doc,password:null
)
.catch((err)=>throw err;)
)
.catch((err)=>
throw err;
)
)
,
,
graphiql:true
)
);
uri=process.env.URI
mongoose.connect(uri,
useNewUrlParser:true
,useCreateIndex:true
, useUnifiedTopology:true
)
.then(()=>
console.log("database connected")
app.listen(5000);
)
.catch((err)=>
console.log(err)
)
变异
mutation
createLocation(
inputLocation_otherItems: locationType:"clinic"
imageUrl:["/images/01.png"]
inputLocationName: lang:"en"
text:"Life Clinic"
inputLocationMap:type:"Point"
coordinates:[2342342,2342345]
)
locationNamelang
text
locationType
imageUrl
locationMaptype
coordinates
结果
"data":
"createLocation":
"locationName": [
"lang": "en",
"text": "Life Clinic"
],
"locationType": "clinic",
"imageUrl": [
"/images/01.png"
],
"locationMap":
"type": "Point",
"coordinates": [
2342342,
2342345
]
【讨论】：
input InputLocation locationName:[InputLocationName!]! locationType:String! imageUrl:[String!] locationMap:InputLocationMap! 以上是关于如何从猫鼬模型制作graphql？的主要内容，如果未能解决你的问题，请参考以下文章