时间:2021-07-01 10:21:17 帮助过:174人阅读
例如:
app/model/user.js
/**
* 用户模型
*/
module.exports = app => {
const { STRING, INTEGER } = app.Sequelize;
const User = app.model.define(‘user‘, {
id: {
type: INTEGER,
autoIncrement: true,
primaryKey: true
},
name: {
type: STRING,
allowNull: false
},
password: {
type: STRING(32),
allowNull: false
}
});
// 表关联的字段
User.associate = function() {
// 一对多
app.model.User.hasMany(app.model.Diary, { foreignKey: ‘user_id‘, targetKey: ‘id‘})
}
return User;
}
app/model/diary.js
/**
* 日志模型
*/
module.exports = app => {
const { STRING, INTEGER } = app.Sequelize;
const Diary = app.model.define(‘diary‘, {
id: {
type: INTEGER,
autoIncrement: true,
primaryKey: true
},
title: {
type: STRING,
allowNull: false
},
content: {
type: STRING,
allowNull: false
}
});
// 表关联的字段
Diary.associate = function() {
app.model.Diary.belongsTo(app.model.User, { foreignKey: ‘user_id‘, targetKey: ‘id‘})
}
return Diary;
}
在 controller 中调用 model:
app/controller/home.js
‘use strict‘;
const Controller = require(‘egg‘).Controller;
class HomeController extends Controller {
async index() {
const { ctx } = this;
ctx.body = ‘hi, egg‘;
}
// 添加日志
async add() {
const { ctx } = this;
// 从前端获取post请求发来的数据
const param = ctx.request.body;
const result = await ctx.model.Diary.create({
title: param.title,
content: param.content,
user_id: 2
});
console.log(‘add方法‘, result);
if(result){
ctx.body = ‘创建成功‘;
}else{
ctx.body = ‘创建失败‘;
}
}
// 登录判断
async loginCheck() {
const { ctx } = this;
// // 关联查询
// const data = await ctx.model.User.findAll({
// include: {
// model: ctx.model.Diary
// }
// });
// ctx.body = data;
// post请求传来的参数
const { name, password } = ctx.request.body;
let message = ‘‘, data = {};
// 判断数据库里面是否存在该用户
const user = await ctx.model.User.findOne({
where: {
name: name
}
});
if(!user){
message = ‘用户不存在‘;
}else if(password !== user.password){
message = ‘密码错误‘;
}else{
message = ‘登录成功‘;
data = { id: user.id };
}
ctx.body = {
message,
data
};
}
}
module.exports = HomeController;
注:Field ‘id‘ doesn‘t have a default value 解决方案

原因 id 没有设置自动递增

使用EggJS开发接口(二)使用数据库之egg-sequelize
标签:ase 否则 database src script foreign iar top update