Also it's not the only columns which are misidentified, or that I have not 
trained the ORM how to identify, YET... Which is what I'd like to puzzle 
through if it is even possible, vehiclereg0_.Player_id.

Honestly I'm not even sure how this SQL is being formed, unless perhaps I 
have a relationship or reference inversion incorrect perhaps.

SELECT vehiclereg0_.Player_id as player4_5_9_, 
vehiclereg0_.VehicleRegistration_id as vehicleregistration5_5_9_, 
vehiclereg1_.Id as id1_5_0_, vehiclereg1_.PlayerId as playerid2_5_0_, 
vehiclereg1_.VehicleId as vehicleid3_5_0_, player2_.Id as id1_4_1_, 
player2_.ServerProfileId as serverprofileid2_4_1_ ...  left outer join 
public.efcore_wbe_serverprofile serverprof9_ on 
motorvehic6_.ServerProfileId=serverprof9_.Id WHERE vehiclereg0_.Player_id=?

The example SQL above, not even sure how the majority of all this is even 
necessary, seems like extraneous junk happening somehow, because I am 
mapping a joining table? Is there a better base mapping class for that, 
perhaps? I'm not sure...

On Wednesday, October 22, 2025 at 6:08:40 PM UTC-4 Michael W Powell wrote:

> Getting some errors after mapping the joining table. It is for whatever 
> reason looking for a column i.e. vehiclereg0_.vehicleregistration_id, vreg 
> being object 'table'. The base model Id property should be this:
>
> Id(x => x.Id)
>     .Column(nameof(ModelBase.Id))
>     .Not.Nullable()
>     .GeneratedBy.GuidComb();
>
> Not sure why the joining is trying to label it "vehicleregistration_id" 
> that is definitely incorrect.
>
> How to persuade NH? Fluent NH? How to map it correctly?
>
> The only columns that should really be mapped otherwise are:
>
> References(x => x.Owner)
>     .Not.Nullable();
>
> References(x => x.Vehicle)
>     .Not.Nullable();
>
> TBD what level of inverse relationship there should be.
>
> Note, vehicle can only be registered to one player at a time, so perhaps 
> M2M is overkill.
>
> Thoughts?
>
> Thank you...
>
> On Wednesday, October 1, 2025 at 6:02:14 PM UTC-4 Michael W Powell wrote:
>
>> Hello,
>>
>> I want to map a joining table between A and B. I have a sense how to map 
>> the A and B sides of the relationship, one of which I think should be 
>> .Inverse(), yes?
>>
>> I am not hundred percent positive, but I may need to attach additional 
>> properties than just linking A to B and vice versa.
>>
>> So I need to introduce a map for the joining table C as well. But, 
>> personally, I'm not quite sure how that would work.
>>
>> Any insights?
>>
>> Best, thank you...
>>
>> Michael W. Powell
>>
>

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