Node.js 加载sequelize中关系为空的项目
我是sequelize新手,我正在尝试加载任务关系为空的用户表中的所有条目。但它不起作用。以下是我尝试过的:Node.js 加载sequelize中关系为空的项目,node.js,sequelize.js,Node.js,Sequelize.js,我是sequelize新手,我正在尝试加载任务关系为空的用户表中的所有条目。但它不起作用。以下是我尝试过的: const express = require('express'); const app = express(); const Sequelize = require('sequelize'); const sequelize = new Sequelize('sequelize', 'mazinoukah', 'solomon1', { host: 'localhost',
const express = require('express');
const app = express();
const Sequelize = require('sequelize');
const sequelize = new Sequelize('sequelize', 'mazinoukah', 'solomon1', {
host: 'localhost',
dialect: 'postgres',
pool: {
max: 5,
min: 0,
acquire: 30000,
idle: 10000,
},
});
const Task = sequelize.define('Task', {
name: Sequelize.STRING,
completed: Sequelize.BOOLEAN,
UserId: {
type: Sequelize.INTEGER,
references: {
model: 'Users', // Can be both a string representing the table name, or a reference to the model
key: 'id',
},
},
});
const User = sequelize.define('User', {
firstName: Sequelize.STRING,
lastName: Sequelize.STRING,
email: Sequelize.STRING,
TaskId: {
type: Sequelize.INTEGER,
references: {
model: 'Tasks', // Can be both a string representing the table name, or a reference to the model
key: 'id',
},
},
});
User.hasOne(Task);
Task.belongsTo(User);
app.get('/users', (req, res) => {
User.findAll({
where: {
Task: {
[Sequelize.Op.eq]: null,
},
},
include: [
{
model: Task,
},
],
}).then(function(todo) {
res.json(todo);
});
});
app.listen(2000, () => {
console.log('server started');
});
如果我有三个用户,其中两个用户各有一个任务,我只想加载最后一个没有任务的用户。这在sequelize中可能吗?经过多次调试,我找到了解决方案
app.get('/users', (req, res) => {
User.findAll({
where: {
'$Task$': null,
},
include: [
{
model: Task,
required: false,
},
],
}).then(function(todo) {
res.json(todo);
});
});
加入本条
where: {
'$Task$': null,
},
我可以只加载用户而不加载任务