Is it possible to query over DocumentReference[] array?

Question

From: https://firebase.google.com/docs/firestore/query-data/queries

// Create a reference to the cities collection

var citiesRef = db.collection("cities");

// Create a query against the collection.

var query = citiesRef.where("state", "==", "CA");

From documentation it is possible to query collection. (CollectionReference type)

But I am having document that contains array of references, which has type DocumentReference[] and I am curious is it possible to achieve query over DocumentReference[]? Something like:

someCities : DocumentReference[];

someCities.where("street", "==", "School street")

Doug Stevenson · Accepted Answer · 2019-04-14 16:45:17Z

1

If you want to query a DocumentReference array type field, you will have to use an array-contains query, and pass a DocumentReference type object to it. It won't work with a string.

const ref = db.collection('coll').doc('doc');
db.collection('coll').where('refField', 'array-contains', ref);

answered Apr 14, 2019 at 16:45

Doug Stevenson

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1 Comment

I.Step Over a year ago

Thank you for the fast reply, not actualy what I expected, but I solved a problem with for loop through my array of reference with calling get() function to get data what reference are representing.

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