How to delete all datastore in Google App Engine?

Question

Does anyone know how to delete all datastore in Google App Engine?

Answer 1

Here's how I did this naively from a vanilla Google Cloud Shell (no GAE) with python3:

from google.cloud import datastore
client = datastore.Client()
query.keys_only()
for counter, entity in enumerate(query.fetch()):
    if entity.kind.startswith('_'):  # skip reserved kinds
        continue
    print(f"{counter}: {entity.key}")
    client.delete(entity.key)

This takes a very long time even with a relatively small amount of keys but it works.

More info about the Python client library: https://googleapis.dev/python/datastore/latest/client.html