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From Matteo Barbieri <m.barbi...@ste-energy.com>
Subject Saving two related objects
Date Fri, 17 Feb 2006 10:05:16 GMT
Hi,
maybe it's a stupid question, but I got an error that I don't know why
it happens.

I have two tables that are related by foreign key.

I have to create one istance of both objects and to save them.

I do something like this:

FirstClass first = new FirstClass();
SecondClass second = new SecondClass();

first.save();

second.setFirstClass(first);
second.save();

the first object is saved correctly, but then I got an SQLException:

java.sql.SQLException: Cannot add or update a child row: a foreign key
constraint fails

I've tried to print both objects before every saving and the second
object has the correct foreign key.

Any idea?

Thanks

-- 
Matteo Barbieri
S.T.E. s.r.l.
m.barbieri@ste-energy.com


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