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best method to keep and update unique data entries google app engine python

Answer 1

+1 A:

You've got the right idea already.

If 2 SR entities were constructed with the same key_name argument, then they will have the same Key path. Writing one will overwrite any old SR entity which had that key_name argument.

You should be able to observe this by querying the datastore for the entity with its unique key:

s = db.get(db.Key.from_path('SR', 't5-2rain'))

David Underhill 2010-07-05 16:20:56

ok I just called as you shown and I get the most recent entry for that key name , but I am looking at my development console and I see 3 entries with the same key-name? Why do the old ones still exist? Shouldn't they be overwritten? Basically if i do as follows I will see 2 entries with same key name in my dev consoles = SR(key_name="t5-2rain")s.name = 't5-2rain's.title = 'kaja's.url = 'okedoke'db.put(s)s = SR(key_name="t5-2rain")s.name = 't5-2rain's.title = 'kaja2's.url = 'okedoke2'db.put(s)

2010-07-05 16:33:14

Are you seeing this on the dev or production server? I don't see it in either case (whether using the default db type or sqlite db on the dev server). Could you post a screenshot of what you're seeing?

David Underhill 2010-07-05 19:43:26

Weird I removed all entries and then entered it twice and it is now overwriting like it should lol

2010-07-05 21:57:04

Strange indeed. I'm glad it is working like we'd expect now.

David Underhill 2010-07-05 22:26:52

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