CODEWITHSUNDEEP
javascriptnode.jsloopbackjsloopback
Caleuanhopkins
Caleuanhopkins

Reputation: 175

Loopback - see data before overwriting in "after save" hook

I've seen this question: Strongloop : Compare old model with the new instance in operation hook 'before save'

Is there any way to get the data in the DB before the overwriting is done in the before save hook? Basically, I want to be able to pass one element to update in a put request rather than pass all required fields during the request.

Upvotes: 0

Views: 911

Answers (1)

Undrium
Undrium

Reputation: 2678

It seems like you are looking for upsertWithWhere or upsert which does a PATCH rather then a PUT. If you do that and the right row can be identified (you send along the primary ID or identify the row) only the passed along data will be updated/overwritten and the rest will be kept.

That's the easy way, if you want to do something more advanced (like doing modifies on DB before a save) then you just have to access the Model in the before save hook and modify. Remember you can do anything before a save as long as you postpone the "next()" call.

Upvotes: 1

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