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Child object is not saving.

 
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I have a screen where parent table has two child and having one to one mapping between parent and child's.

I want if parent is saved then child should automatically saved.But this not happening.
Where Student is parent and school and scast are its child.

Please help me....


Below are my HBM files.



Java code
 
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How about saving the school object instead of student?
 
It is sorta covered in the JavaRanch Style Guide.
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