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Editorial Team
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Asked: 2026-05-23T18:42:19+00:00

Can you explain the reason for using inverse=true attribute in relationship mapping in NHibeernate

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Can you explain the reason for using inverse=”true” attribute in relationship mapping in NHibeernate with an example that requires the need of this attribute to be ‘true’ ?

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  1. Editorial Team

    If you have a bidirectional association, then from .net side, you must code both sides. Like

    parent.Children.Add(child);
child.Parent = parent;

    however from nhibernate perspective this will send 2 update statements by default for each of the lines. What you want is only to update ParentId column of the Child table. Inverse = true makes sure that changes made to that part doesn’t cause any changes in DB. So if you use Inverse = true and just write the below

    parent.Children.Add(child);

    nothing will happen in the db since that is the inverse side.

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