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views:

35

answers:

2
+2  Q: 

Reference ID in GAE

I have a feeling the answer is simple and documented, but I'm absolutely missing it:

Is there a way, using Python and webapp through Google App Engine, to pass the id field of a record to the template? I'm fairly new to the app engine, and yes, I have searched all around the Google Documentation to find this.

+3  A: 

I can reference it through record.key().id(). I just found this RIGHT AFTER I posted this question (as luck would have it). Sorry for wasting anybody's time.

Matt  2010-07-08 20:29:06
Oh wow... Didn't didn't see your answer while submitting mine... Deleting
Gab Royer  2010-07-08 20:33:18
Note that these IDs are unique across all kinds, so for any given kind, the entities' IDs may not be a natural progression (`1, 2, 3, ...`). Some numbers will be missing because they'll have been assigned to entities of other kinds.
Nikhil Chelliah  2010-07-08 20:59:09
Nikhil: that's not correct. IDs aren't even unique within a kind; they're unique within a kind and entity group. The reason they're not sequential is that an instance is allocated a large block of IDs, and unused ones aren't assigned to later instances.
Wooble  2010-07-09 03:06:18
+1  A: 

Assuming you're using the built-in Django 0.96 templates, you can access the ID (assuming the entity has one; it might have a key name instead if you saved it with one) with {{entity.key.id}}.

Wooble  2010-07-09 03:08:33

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