[baseten-users] ERROR: null value in column "xyz" violates not-null constraint when trying to insert mandatory data

[Tuukka Norri]

Hi!

Réjean Lamy kirjoitti 23.5.2009 kello 15.41:
> It is mentioned "..the context needs to know about your objects:  
> that's why you can't just go and instantiate BXDatabaseObjects on  
> your own."
> And the recommendation about using createObjectForEntity:entity.
>
> Questions:
>
> May I conclude that unlike CoreData, this is not possible to simply  
> instantiate a BXDatabaseObjects, instead we must first create the  
> objects as explained ?
That's correct. This way we get the database to set default values,  
call INSERT triggers, increment the sequence used by a SERIAL column  
etc.

> Also, I would like to know where is the recommended place in code to  
> creates the BXDatabaseObjects (In App Controller -init, - 
> awakeFromNib, others...) ?
It should be possible to do this anywhere. The database context needs  
to be connected, though.

BXSyncrhonizedArrayController's methods -newObject and -createObject:  
call the database context's creation method, so if your application  
uses the array controller, you might want to call them instead.
-- 
Best regards,
Tuukka Norri
MK&C