How to delete all datastore in Google App Engine?

Question

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

Answer 1

For any datastore that's on app engine, rather than local, you can use the new Datastore API. Here's a primer for how to get started.

I wrote a script that deletes all non-built in entities. The API is changing pretty rapidly, so for reference, I cloned it at commit 990ab5c7f2063e8147bcc56ee222836fd3d6e15b

from gcloud import datastore
from gcloud.datastore import SCOPE
from gcloud.datastore.connection import Connection
from gcloud.datastore import query

from oauth2client import client

def get_connection():
  client_email = 'XXXXXXXX@developer.gserviceaccount.com'
  private_key_string = open('/path/to/yourfile.p12', 'rb').read()

  svc_account_credentials = client.SignedJwtAssertionCredentials(
    service_account_name=client_email,
    private_key=private_key_string,
    scope=SCOPE)

  return Connection(credentials=svc_account_credentials)


def connect_to_dataset(dataset_id):
  connection = get_connection()
  datastore.set_default_connection(connection)
  datastore.set_default_dataset_id(dataset_id)

if __name__ == "__main__":
  connect_to_dataset(DATASET_NAME)
  gae_entity_query = query.Query()
  gae_entity_query.keys_only()
  for entity in gae_entity_query.fetch():
    if entity.kind[0] != '_':
      print entity.kind
      entity.key.delete()