Re: Many-to-Many Join Table PK
Re: Many-to-Many Join Table PK
- Subject: Re: Many-to-Many Join Table PK
- From: David Avendasora <email@hidden>
- Date: Tue, 16 Nov 2010 12:48:58 -0500
On Nov 16, 2010, at 12:32 PM, Ray Kiddy wrote:
>
> On Nov 16, 2010, at 6:32 AM, David Avendasora wrote:
>
>> Hi all,
>>
>> I have a Many-to-Many relationship and the join table does _not_ have a compound PK. It has a normal PK with a dataType of Long. The FKs that represent the to-One relationships on the join table are simply FKs and not part of the PK.
>>
>> I would like to flatten the toMany relationships, but when I add an object to the relationship and EOF tries to create a row in the join table it tries to create a compound PK for the join table, even though the Model is very clear as to what the PK is.
>>
>> Is this the normal EOF behavior to ignore the Model's PK settings for the join table and just assume that the PK is compound?
>>
>> I've always avoided flattened relationships because every time I try to use them I run into problems and give up and go back to regular relationships because it seems the work that flattened relationships save always gets offset by the limitations they impose (either that or my limitations of ability to use them properly).
>>
>> Dave _______________________________________________
>
> Riffing off a problem I had recently, I would guess that the tool (ever so helpfully) set the 'propagate primary key' on the relationships going into the join table. If that property is set on the two relationships, that may be enough to confuse things.
I checked that and no, Propagates Primary Key isn't set on any of the 4 relationships involved.
Another detail is that I'm using Oracle and sequences to create the primary key, so I'm looking into a problem with that sequence as well.
Dave
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