我使用SequelizeJS作为我的ORM。
我有一个"视频"模型。该模型使用"视频"表。
如何创建包含时间戳的迁移?我是否需要定义自己的时间戳列,或者是否有快捷方式?
在 /migrations/123412341234-create-videos-table.js
'use strict';
module.exports = {
up: function (queryInterface, Sequelize) {
queryInterface.createTable(
'Videos',
{
id: {
type: Sequelize.INTEGER,
primaryKey: true,
autoIncrement: true
},
title: {
type: Sequelize.STRING,
allowNull: false,
unique: true
},
author: {
type: Sequelize.STRING,
allowNull: false
},
videoUrl: {
type: Sequelize.STRING,
},
coverUrl: {
type: Sequelize.STRING,
}
}
);
},
down: function (queryInterface, Sequelize) {
queryInterface.dropTable('Videos');
}
};
在 /models/video.js
中module.exports = function(sequelize, DataTypes) {
return sequelize.define('Video', {
title: {
type: DataTypes.STRING,
allowNull: false,
unique: true
},
author: {
type: DataTypes.STRING,
allowNull: false
},
videoUrl: {
type: DataTypes.STRING,
},
coverUrl: {
type: DataTypes.STRING,
}
});
}
在 /models/index.js (这是通过运行$ sequelize init
创建的默认值)
'use strict';
var fs = require('fs');
var path = require('path');
var Sequelize = require('sequelize');
var basename = path.basename(module.filename);
var env = process.env.NODE_ENV || 'development';
var config = require(__dirname + '/../config/config.json')[env];
var db = {};
if (config.use_env_variable) {
var sequelize = new Sequelize(process.env[config.use_env_variable]);
} else {
var sequelize = new Sequelize(config.database, config.username, config.password, config);
}
fs
.readdirSync(__dirname)
.filter(function(file) {
return (file.indexOf('.') !== 0) && (file !== basename);
})
.forEach(function(file) {
if (file.slice(-3) !== '.js') return;
var model = sequelize['import'](path.join(__dirname, file));
db[model.name] = model;
});
Object.keys(db).forEach(function(modelName) {
if (db[modelName].associate) {
db[modelName].associate(db);
}
});
db.sequelize = sequelize;
db.Sequelize = Sequelize;
module.exports = db;
答案 0 :(得分:2)
使用迁移时,不会为您创建主键,updatedAt和createdAt字段。相反,您应该确保在迁移中创建这些列。
要使updatedAt和createdAt列自动更新,您可以在模型中使用钩子。
即:
module.exports = function (sequelize, DataTypes) {
var Person = sequelize.define('Person', {
id: {
type: DataTypes.INTEGER,
primary: true,
autoincrement: true
},
name: DataTypes.STRING,
updatedAt: DataTypes.DATE,
createdAt: DataTypes.DATE
}, {
hooks: {
beforeCreate: function (person, options, fn) {
person.createdAt = new Date();
person.updatedAt = new Date();
fn(null, person);
},
beforeUpdate: function (person, options, fn) {
person.updatedAt = new Date();
fn(null, person);
}
}
});
return Person;
}
^离开我的头顶而没有经过测试!