How do I delete all entities from my local Google App-engine datastore?

Question

How can I remove all entities or reset the local datastore on my dev_appserver? I accidentally recursively called a function to create an entity when testing.

I am using the Google App-engine SDK on Vista with Python.

score 31 · Accepted Answer · edited Apr 15 '15 at 09:26

31

dev_appserver.py --clear_datastore=yes myapp

See here for more info.

Shorthand version:

dev_appserver.py -c

edited Apr 15 '15 at 09:26

Hoang Pham

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answered Jun 18 '09 at 03:06

mechanical_meat

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Wow, looked over that for sure. Thank you – Jason Rikard Jun 18 '09 at 03:08
If you are using the App Engine Launcher, you can do the same by putting the flags in "Extra Command Line Flags" field by going to Edit > Application Settings – jesal Aug 23 '12 at 22:06
this seems to be outdated or something... i get errors trying to use it – Or Gal Dec 20 '13 at 08:56
6

that didnt work but this did dev_appserver.py [app directory] --clear_datastore true – Or Gal Dec 20 '13 at 09:02
Any insight as to why this works, while deleting the entire "target" directory doesn't? Where exactly is the datastore being stored? – dzimney Dec 16 '17 at 17:21

score 20 · Answer 2 · answered Apr 09 '13 at 08:59

20

If you came here for a Java solution: Delete the following file:

{project root}/WEB-INF/appengine-generated/local_db.bin

Rebuild and restart your project.

answered Apr 09 '13 at 08:59

Nilzor

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Can't find this directory in the project – serj Oct 14 '15 at 07:39
I have found such file in `out/artifacts/xxxx_war_exploded/WEB-INF/appengine-generated`, the file seems surprisingly small, though - it is probably only some kind of index, real data (blobs?) are probably stored someplace else. I had to restart the server to complete the deletion. – Suma Apr 28 '17 at 19:47

Or Gal · Answer 3 · 2013-12-20T09:29:22.817

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dev_appserver.py [app directory] --clear_datastore true

you need to shutdown the server if its running at the time to free the ports

edited Dec 20 '13 at 09:29

answered Dec 20 '13 at 09:02

Or Gal

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score 2 · Answer 4 · answered Mar 25 '10 at 15:36

A useful thing to do is to always specify --datastore_path, e.g. --datastore_path=test.datastore.

To delete it you can then just delete the file. You can also keep copies and swap them in and out. And the store will persist over reboots (when /tmp/ the default location for it on Linux anyway, gets cleared)

score 0 · Answer 5 · answered Mar 21 '17 at 15:14

Here is my output after running dev_appserver

INFO     2017-03-21 15:07:36,085 devappserver2.py:764] Skipping SDK update check.
INFO     2017-03-21 15:07:38,342 api_server.py:268] Starting API server at: http://localhost:63970
INFO     2017-03-21 15:07:38,349 dispatcher.py:199] Starting module "default" running at: http://localhost:8080
INFO     2017-03-21 15:07:38,373 admin_server.py:116] Starting admin server at:

So I go to http://localhost:8000 and I am able to go to my local App Engine Admin Console and edit/delete datastore entities.

score 0 · Answer 6 · answered Mar 27 '12 at 08:14

0

In production - you can go to appengine dashboard => Datastore admin

answered Mar 27 '12 at 08:14

ronme

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score -1 · Answer 7 · answered May 06 '11 at 11:06

in production, this may also come in handy (or be a security nightmare).

# will DELETE the database use http://localhost:8083/deletemodels?force=true
class DeleteModels(webapp.RequestHandler):
    def get(self):

    def dMsg(msg):
      self.response.out.write(msg + '\n')
    n = self.request.get('force')
    if n:
      dMsg('clearing YourModelHere data....')
      for uc in YourModelHere.all():
               uc.delete()
               dMsg('.')
      dMsg('clearing YouNextModelHere data....')           
      for uc in YouNextModelHere.all():
               uc.delete()
               dMsg('.')

In production, you can also do it from the Datastore Admin, which submits a delete Task. — hyperslug, May 06 '11 at 13:00

How do I delete all entities from my local Google App-engine datastore?

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