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From Michael Gentry <>
Subject Re: Relationships between datamaps in different projects
Date Thu, 03 Nov 2011 13:46:54 GMT
You'd add to CM a place to look for other other models (either a
classpath approach or explicitly identify the other models).  CM
wouldn't need to edit the other models, but in the relationship
inspector allow referencing the other entities in the model group.  At
least that's a first approach.  I didn't use model groups extensively
and my memory is a bit rusty.  I can try to find more info on them
later if that helps.



On Thu, Nov 3, 2011 at 9:33 AM, Andrus Adamchik <> wrote:
> What does that mean in practical terms? How do we define that "group" in the Modeler?
> On Nov 3, 2011, at 4:25 PM, Michael Gentry wrote:
>> EOModeler had model groups where you could reference external models.
>> That's probably the approach Cayenne Modeler would need to take.
>> On Thu, Nov 3, 2011 at 9:12 AM, Andrus Adamchik <> wrote:
>>> This is one of the unsolved things. The relationships between DataMaps are supported
in runtime (all DataMaps are loaded in a single namespace, so entities can reference each
other freely).
>>> During modeling I am not sure how we can do that. We just had this discussion
in my company recently, but no solution yet. If there are ideas how that can be implemented,
let's discuss.
>>> Andrus
>>> On Nov 3, 2011, at 1:45 PM, Hugi Thordarson wrote:
>>>> Hi all!
>>>> Most of our projects share a set of common DB tables (users, permissions
etc). The code and cayenne.xml for these entities resides in a standalone project, works great.
>>>> However, I'm wondering if I can create relationships from entities in our
client projects to entities in the common project? And if so, do I have to do it in code,
or is there any way for CayenneModeler to pick up the entities in the common project, so I
can model the relationships in the GUI?
>>>> Cheers,
>>>> - hugi
>>>> PS:  I started a huge thread regarding outer joins, and I haven't had the
time to respond yet. Preparing a massive thesis on that one ;-)

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