How to list all collection IDs of a firestore project with the REST API

Question

Searching through the google cloud docs and found ways to list projects such as https://cloud.google.com/resource-manager/reference/rest/v3/projects/list and also this one to list collection ids when you get the document path https://cloud.google.com/firestore/docs/reference/rest/v1/projects.databases.documents/listCollectionIds#google.firestore.v1.Firestore.ListCollectionIds but still can't seem to find a REST API method to fetch all of the collection ids in a firestore project without a document path and just the project id.

Answer 1

You may be encountering this (long-standing) issue: Parent parameter has incorrect pattern for some of methods in discovery API .

To be clear, not all Collections are owned by the root. You are unable to enumerate Collections that are children of Documents without navigating through the hierarchy.