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const express = require('express');
const { buildSchema } = require('graphql');
const {graphqlHTTP} = require('express-graphql');
const mysql = require('mysql2');
var connection = mysql.createConnection({
host : 'localhost',
user : 'admin',
password : 'Jason@#123',
database : 'dashen'
});
connection.connect((err) => {
if (err) {
console.error('Error connecting to MySQL:', err);
process.exit(1);
}
console.log('Connected to MySQL database');
});
const schema = buildSchema(`
type Account {
name: String
age: Int
sex: String
department: String
}
input AccountInput {
name: String
age: Int
sex: String
department: String
}
type Mutation {
createAccount(input: AccountInput): Account
updateAccount(id: ID!, input: AccountInput): Account
deleteAccount(id: ID!): Boolean
}
type Query {
account: [Account]
}
`);
const fakeDb = {};
const root = {
createAccount: ({input}) => {
const data = [
input.name,
input.age,
input.sex,
input.department
]
return new Promise((resolve, reject) => {
connection.query('INSERT INTO `account`(`name`,`age`,`sex`,`department`) VALUES(?,?,?,?)',data,function (error, results, fields) {
if (error) {
console.log(error);
return;
};
console.log('The solution is: ', results);
resolve(input);
});
});
},
updateAccount: ({id, input}) => {
const setClause = Object.keys(input).map(key => `${key} = ?`).join(', ');
const values = Object.values(input).concat(id);
return new Promise((resolve, reject) => {
connection.query(
`UPDATE \`account\` SET ${setClause} WHERE \`name\` = ?`,
values,
function (error, results, fields) {
if (error) {
console.log(error);
return reject(error);
}
console.log('The solution is: ', results);
resolve({ ...input, id }); // 返回更新的数据，并保留 ID
}
);
});
},
deleteAccount: ({id}) => {
return new Promise((resolve, reject) => {
connection.query('DELETE FROM `account` WHERE name = ?',id,function (error, results, fields) {
if (error) {
console.log(error);
return;
};
console.log('The solution is: ', results);
resolve(true);
})
})
},
account: () => {
// var arr = [];
// for(const key in fakeDb) {
// arr.push(fakeDb[key]);
// }
// return arr;
return new Promise((resolve, reject) => {
connection.query('SELECT name, age, sex, department FROM `account`',function (error, results, fields) {
if (error) {
console.log(error);
return;
};
console.log('The solution is: ', results);
const arr = [];
for(let i = 0; i < results.length; i++) {
arr.push({
name: results[i].name,
age: results[i].age,
sex: results[i].sex,
department: results[i].department
});
}
resolve(arr);
});
});
}
};
const app = express();
app.use('/graphql', graphqlHTTP({
schema: schema,
rootValue: root,
graphiql: true,
}));
app.listen(4000);
# mutation{
# createAccount(input: {
# name: "wzw",
# age: 11,
# sex:"男",
# department: "xxx"
# }) {
# name
# }
# }
# mutation{
# updateAccount(id: "111", input:{
# age: 777
# }){
# age
# }
# }
# mutation{
# deleteAccount(id:"111")
# }
query{
account{
name
age
sex
department
}
}
|
