CODEWITHSUNDEEP
firebasegoogle-cloud-firestore
David Min
David Min

Reputation: 1414

Firestore - Batch querying nested documents in REST API

There is a way to batch get documents after you specified exactly all the file paths using https://firestore.googleapis.com/v1/projects/projectName/databases/dbName/documents:batchGet.

And there is a way to get all documents and their fields under a collection by sending a GET to https://firestore.googleapis.com/v1/projects/projectName/databases/dbName/documents/collectionName

I ideally want to make a batch request to get document fields for all documents under an array of collections. Is there a way to do this without knowing the document names of every document I intend to get?

Example

I have a structure like projects/projectName/databases/dbName/documents/Inventory/productId/variantId/*location* Each productId is a document, and under this it has a collection for each variant, and within that collection are documents for each location, that contains a field count.

For a basket, I want to get all inventory counts for all inventory locations, for each productId/variantId in that bas

Upvotes: 0

Views: 338

Answers (1)

Frank van Puffelen
Frank van Puffelen

Reputation: 599131

It is not possible to get all documents based on an array of collection names.

You can use a collection group query and search all collections of a given name, but then you must know the path of each document you want to read.

Alternatively, you can get all documents under a specific path, but then you can't filter by ID anymore, and the collections have to be under a path - not an array.

Upvotes: 1

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