The characteristics of entity groups that enable performance
optimizations actually enable some fairly interesting operations.
Unfortunately, these operations are not exposed in some cases.
In this case, ancestor('__key__') should be trivial to support and not
slow things down. I don't think that it necessarily enables any
performance hacks, but it might.
On Dec 10, 12:26 am, Lakshmi <[EMAIL PROTECTED]> wrote:
> Yes :)
>
> I think Entity Groups are optimized more for performance and less for
> function. (Another example to reinforce this statement is the need to
> pass in the parent_id in get_by_id or the underlying assertion that
> the id's may not be unique outside of the entity group)
>
> On Dec 9, 11:59 am, Andy Freeman <[EMAIL PROTECTED]> wrote:
>
>
>
> > > I also discovered that a root node is one that is its own ancestor.
>
> > too bad queries with ancestor('__key__') or with 'ANCESTOR is
> > __key__' (or the bound equivalent) don't work.
>
> > On Dec 6, 6:49 pm,Lakshmi<[EMAIL PROTECTED]> wrote:
>
> > > Sorry I completely forgot about this thread.
>
> > > I added a is_root property to my model to work around this problem.
>
> > > I also discovered that a root node is one that is its own ancestor.
>
> > > On Oct 27, 11:02 am, "Vincent L." <[EMAIL PROTECTED]> wrote:
>
> > > > I have the same problem, did you find an answer ?
>
> > > > On 10 oct, 21:04,Lakshmi<[EMAIL PROTECTED]> wrote:
>
> > > > > Hello,
>
> > > > > If we take the following example:
>
> > > > > Comment
> > > > > - post (reference to Post)
> > > > > - text
> > > > > - author
>
> > > > > where comments that are responded to become parents of other comments,
> > > > > how can I get only therootentities - comments that are not
> > > > > responses?
>
> > > > > Comment.gql("WHERE post=:post AND ANCESTOR IS None", post=<some_post>)
> > > > > does not work. I get a "Invalid WHERE condition at symbol None"
> > > > > error.
>
> > > > > Thanks in advance
> > > > >Lakshmi.- Hide quoted text -
>
> > > - Show quoted text -- Hide quoted text -
>
> - Show quoted text -
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