So you want to be able to find all URL's saved by a User that have a
certain Tag? Or, all the Users that have Tagged "Tech" to a URL? Or,
all the Tags given a URL by a certain User?
This can be done with our Model. It's actually what the second part
of the video in the link is about.
Merge Join
All you need to do is add a second filter.
not sure if the syntax is:
query.setFilter("urlId == urlParam");
or
query.setFilter("urlId == urlParam && userId == userParam");
This query would return all the Tags that a specific User put on a
specific URL.
I hope this is what you were looking for.
On Jan 20, 5:39 pm, Benjamin Carlson <[email protected]> wrote:
> I just came across this document:
>
> http://www.scribd.com/doc/24330945/No-Relation-The-Mixed-Blessings-of...
>
> It helps, but doesn't completely answer my question. It would appear that
> what I'm wanting to do is an EAV (entities/attributes/values) type
> relationship, however, I'm still not clear on how to do so in GAE/J and
> still be able to query how I need to.
>
> As for adding a list to each of User and Tag, it doesn't keep the
> relationship between the User, Tag AND URL... just two of the three...
> that's what's causing me heartburn here... :) Or, perhaps it does, and I'm
> too relationally-minded to see it?
>
> Thanks!
>
> -Ben
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