SailsJS: beforeUpdate (Lifecycle callback), access current values

问题

It's clear how to access the new values, the first argument contains them

beforeUpdate: function (values, cb) {....}

But how can I access the current values, that are to be replaced?

回答1:

In order do access current values you will have to make the call and get the current record.

models/user.js
beforeCreate: function (values, cb) {
    User.findOne(this.update.arguments[0].id || this.update.arguments[0]).exec(err, function(originalUser){/*...*/})
}

Also check out https://github.com/balderdashy/waterline/issues/1004#issuecomment-102432862 , where this issue is being discussed. Should provide insight into getting the ID and a current solution.

The solution above was updated to reflect the comments.

来源：https://stackoverflow.com/questions/30403501/sailsjs-beforeupdate-lifecycle-callback-access-current-values