[英]Using sails.js with an existing postgres database
I was looking at using Sails for an app that we are developing. 我正在考虑将Sails用于我们正在开发的应用程序。
I'm using the sails-postgresql adapter which uses the waterline orm. 我正在使用使用水线orm的sails-postgresql适配器。
I have an existing database that I want to connect to. 我有一个我想连接的现有数据库。
If I create a model using generate something
如果我使用generate something
创建模型
and then in my model I have 然后在我的模型中我有
attributes:{
title:{type:'String'}
}
If I browse to localhost/something the orm deletes all the columns in the something
table except title. 如果我浏览到localhost / something,orm将删除除title之外的something
表中的所有列。
Is there a way to stop it from doing this? 有没有办法阻止它这样做? This app should not delete columns on this database. 此应用程序不应删除此数据库上的列。
Thanks! 谢谢!
I am the author of Sails-Postgresql. 我是Sails-Postgresql的作者。 Sails has an ORM called Waterline that it uses for managing data. Sails有一个名为Waterline的ORM,用于管理数据。 The default setting assumes that you would want to auto-migrate
your database to match your model attributes. 默认设置假定您希望auto-migrate
数据库以匹配模型属性。 Because Postgresql is a SQL database the Sails-Postgresql adapter has a setting called syncable that defaults to true. 因为Postgresql是一个SQL数据库,所以Sails-Postgresql适配器有一个名为syncable的设置,默认为true。 This would be false in a NoSQL database like redis. 这在像redis这样的NoSQL数据库中是错误的。
This is easy to turn off if you want to manage your database columns yourself. 如果您想自己管理数据库列,这很容易关闭。 You can add migrate: safe
to your model and it won't try and update your database schema when you start Sails. 您可以将migrate: safe
添加到模型中,并且在启动Sails时不会尝试更新数据库模式。
module.exports = {
adapter: 'postgresql',
migrate: 'safe',
attributes: {
title: { type: 'string' }
}
};
Sails doesn't have anything like migrations in Rails. Sails没有像Rails中的迁移那样的东西。 It uses auto-migrations to attempt to remove this from your development process and then leaves updating your production schema to you. 它使用自动迁移尝试从开发过程中删除它,然后将生产模式更新给您。
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