Optional Query Firestore

Question

While using Angular Firestore we can use optional queries like this:

this.afs.collection(this.databaseCollection, ref => { return query ? query : ref; })

Is there something like this for the Admin SDK (firestore) as well? Or do I need to create a separate function for every query?

I would like to have one method (like above) where we can get all the documents in the collection if there is no query given, otherwise use the query.

It says that I can only have one parameter for the collection method. But that means that for every action I have to have a method. I would like to have one method that does a call with a optional parameter. It says that the ref can not be used. — Mark van Turnhout, Jan 04 '19 at 13:47

score 0 · Accepted Answer · edited Jun 20 '20 at 09:12

If I understand you correctly you're trying to create a method that can take both a Query and a Collection as its argument.

In that case it helps to realize that the CollectionReference class extends the Query class. From the linked docs:

CollectionReference

CLASS

A CollectionReference object can be used for adding documents, getting document references, and querying for documents (using the methods inherited from Query).

Extends

Query

So if you create a method signature that accepts a Query, you can also pass a CollectionReference to it.

Optional Query Firestore

1 Answers1

CollectionReference