OK, so I could be wrong about this.
Is there a way to get the number of GAE datastore reads per request?
On Tuesday, June 4, 2013 12:25:06 PM UTC+3, guruyaya wrote:
>
> Lets examine this code for a sec:
> db.define_table('table1',Field('name'))
> db.define_table('table2',Field('table1', db.table1), Field('name2'))
>
> Now, if I need a list of all table2 entries, but not the table1 entries,
> I'll do something like this:
>
> retVal = []
> for entity in db(db.table2.id > 0).select():
> retVal += entity.name2
>
> BUT
> As you well know, web2py acctuall did ask for table1 info, just in case
> I'll do this:
>
> retVal = []
> for entity in db(db.table2.id > 0).select():
> retVal += entity.table1.name
>
> On a normal hosting, it doesn't matter that much, but on GAE, it does an
> extra query to the datastore, and that's just a waste.
> Is there a way to avoid that?
>
> Thanks in advance
> Yair
>
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