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Asked: 2026-05-11T16:36:04+00:00

How to create a Multi-Column Index and/or Unique Constraint using NHibernate Mapping or Fluent

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How to create a Multi-Column Index and/or Unique Constraint using NHibernate Mapping or Fluent NHibernate.

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  1. Editorial Team

    assign a index/unique constraint name to more then one property

    <property name="A" index="AB" />
<property name="B" index="AB" />

    Theoretical it would also work with having more then one index on the same entity:

    <property name="A" index="AB, ABC" />
<property name="B" index="AB, ABC" />
<property name="C" index="ABC" />

    But there is a bug. I also wrote a patch. if you are interested in this, please vote for the bug or add comment or something.

    Edit: just checked what happened to the bug. It is fixed in version 2.1.0, so it should perfectly work now. Many thanks to the great NHibernate developer team!

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