目前我正在开发一个node.js项目,我在构建模式时发现了一个问题,通常,我使用http://docs.sequelizejs.com/manual/tutorial/migrations.html提供的命令行来定义我的模式,这是$ node_modules/.bin/sequelize model:generate --name User --attributes firstName:string,lastName:string,email:string
,在$ node_modules/.bin/sequelize db:migrate
之后,我可以写这些属性到数据库。但是,我想知道如何在迁移后向架构添加新属性,我搜索并发现这个https://github.com/sequelize/cli/issues/133正在讨论这个问题,但是在我尝试了解决方案并再次运行$ node_modules/.bin/sequelize db:migrate
后,它没有将新属性写入原始架构,我不明白问题在哪里,下面是我的代码,我试图在用户架构中添加两个属性'address'和'height',你能给我一些建议吗?谢谢!
'use strict';
module.exports = {
up: (queryInterface, Sequelize) => {
let migration = [];
migrations.push(queryInterface.addColumn(
'address',
'height',
{
type: Sequelize.STRING,
}
));
return Promise.all(migrations);
return queryInterface.createTable('Users', {
id: {
allowNull: false,
autoIncrement: true,
primaryKey: true,
type: Sequelize.INTEGER,
},
firstName: {
type: Sequelize.STRING,
},
lastName: {
type: Sequelize.STRING,
},
email: {
type: Sequelize.STRING,
},
createdAt: {
allowNull: false,
type: Sequelize.DATE,
},
updatedAt: {
allowNull: false,
type: Sequelize.DATE,
},
});
},
down: (queryInterface, Sequelize) => {
return queryInterface.dropTable('Users');
}
};
这个问题已经解决了,你可以用下面的链接How to Add, Delete new Columns in Sequelize CLI来解决那个问题,你也可以查看sequelize的查询部分来查看文件http://docs.sequelizejs.com/class/lib/query-interface.js~QueryInterface.html,真正的答案应该是
module.exports = {
up: function (queryInterface, Sequelize) {
return [
queryInterface.addColumn(
'users',
'height',
{
type: Sequelize.STRING,
}
),
queryInterface.addColumn(
'users',
'address',
{
type: Sequelize.STRING,
}
)
];
},
down: function (queryInterface, Sequelize) {
return [
queryInterface.removeColumn('users', 'height'),
queryInterface.removeColumn('users', 'address')
];
}
};
然后你可以输入
sequelize migration:create --name add-height-and-address-to-user
sequelize db:migrate
将新属性迁移到模型中。