Can I Fetch Multiple Firestore Documents with One Request?

Fetching Multiple Firestore Documents with a Single Request

Question:

Is it possible to retrieve multiple Firestore documents with a single network call using a list of IDs?

Answer:

Yes, there are ways to achieve this using Firestore's SDKs:

Node.js:

firestore.getAll(...documents); // Variant A

let documentRef1 = firestore.doc('col/doc1');
let documentRef2 = firestore.doc('col/doc2');
firestore.getAll(documentRef1, documentRef2).then(docs => {...}); // Variant B

Note: Variant A only works with the Server SDK.

Update:

Firestore now supports IN queries, which provides a more efficient way to retrieve multiple documents by a list of IDs:

myCollection.where(firestore.FieldPath.documentId(), 'in', ["123","456","789"]);

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