问题描述
我正在使用NodeJS,express,express-resource和Sequelize创建RESTful API,用于管理存储在MySQL数据库中的数据集。
我试图找出如何使用Sequelize正确更新记录。
我创建了一个模型:
module.exports = function(Sequelize,DataTypes){
return sequelize.define('Locale',{
id:{
type:DataTypes.INTEGER,
autoIncrement:true,
primaryKey:true
},
语言环境:{
类型:DataTypes.STRING,
allowNull:false,
唯一:true,
validate:{
len:2
}
},
visible:{
type:DataTypes.BOOLEAN,
defaultValue:1
}
})
}
然后,在我的资源控制器中,我定义了一个更新动作。
在这里我想能够更新记录,其中id匹配一个 r首先我建立一个模型,然后我使用
updateAttributes
方法来更新记录。
const Sequelize = require('sequelize')
const {dbconfig} = require ('../config.js')
//初始化数据库连接
const sequelize = new Sequelize(dbconfig.database,dbconfig.username,dbconfig.password)
//语言环境模型
const Locales = sequelize.import(__ dirname +'./models/Locale')
//如果需要,可以创建模式
Locales.sync )
/ **
* PUT / locale /:id
* /
exports.update = function(req,res ){
if(req.body.name){
const loc = Locales.build()
loc.updateAttributes({
locale:req.body。 name
})
.on('success',id => {
res.json({
success:true
},200)
})
.on('failure',error => {
抛出新错误(错误)
})
}
else
抛出新错误('数据未提供')
}
现在,这并不实际产生一个我所期望的更新查询。
而是执行插入查询:
INSERT INTO`Locales`(`id`,`locale`,`createdAt` ,`updatedAt`,`visible`)
VALUES('1','us','2011-11-16 05:26:09','2011-11-16 05:26:15',1 )
所以我的问题是:使用Sequelize ORM更新记录的正确方法是什么?我没有使用,但是在阅读了它的文档后,很明显你是,这就是为什么Sequelize在db中插入一个新记录。
首先你需要搜索记录,抓取它,只有在其属性和之后才能更改它,例如:
Project.find({where:{title:'aProject'}})
.on(' ,function(project){
//检查db
中是否存在记录if(project){
project.updateAttributes({
title:'a very different title now'
})
.success(function(){})
}
})
I'm creating a RESTful API with NodeJS, express, express-resource, and Sequelize that is used to manage datasets stored in a MySQL database.
I'm trying to figure out how to properly update a record using Sequelize.
I create a model:
module.exports = function (sequelize, DataTypes) {
return sequelize.define('Locale', {
id: {
type: DataTypes.INTEGER,
autoIncrement: true,
primaryKey: true
},
locale: {
type: DataTypes.STRING,
allowNull: false,
unique: true,
validate: {
len: 2
}
},
visible: {
type: DataTypes.BOOLEAN,
defaultValue: 1
}
})
}
Then, in my resource controller, I define an update action.
In here I want to be able to update the record where the id matches a req.params
variable.
First I build a model and then I use the updateAttributes
method to update the record.
const Sequelize = require('sequelize')
const { dbconfig } = require('../config.js')
// Initialize database connection
const sequelize = new Sequelize(dbconfig.database, dbconfig.username, dbconfig.password)
// Locale model
const Locales = sequelize.import(__dirname + './models/Locale')
// Create schema if necessary
Locales.sync()
/**
* PUT /locale/:id
*/
exports.update = function (req, res) {
if (req.body.name) {
const loc = Locales.build()
loc.updateAttributes({
locale: req.body.name
})
.on('success', id => {
res.json({
success: true
}, 200)
})
.on('failure', error => {
throw new Error(error)
})
}
else
throw new Error('Data not provided')
}
Now, this does not actually produce an update query as I would expect.
Instead, an insert query is executed:
INSERT INTO `Locales`(`id`, `locale`, `createdAt`, `updatedAt`, `visible`)
VALUES ('1', 'us', '2011-11-16 05:26:09', '2011-11-16 05:26:15', 1)
So my question is: What is the proper way to update a record using Sequelize ORM?
I have not used Sequelize, but after reading its documentation, it's obvious that you are instantiating a new object, that's why Sequelize inserts a new record into the db.
First you need to search for that record, fetch it and only after that change its properties and update it, for example:
Project.find({ where: { title: 'aProject' } })
.on('success', function (project) {
// Check if record exists in db
if (project) {
project.updateAttributes({
title: 'a very different title now'
})
.success(function () {})
}
})
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