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Editorial Team
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Editorial Team
Asked: May 17, 20262026-05-17T18:34:02+00:00 2026-05-17T18:34:02+00:00

The title basically says it all… I’m trying to specify an auto-incrementing (int) identity

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The title basically says it all… I’m trying to specify an auto-incrementing (int) identity column using Fluent-NHibernate and MySQL. I’ve tried the following variations…

Id(x => x.ID).GeneratedBy.Native();
Id(x => x.ID).GeneratedBy.Identity();
Id(x => x.ID).GeneratedBy.Increment();

…and tried setting default values on each.

Note: I’m using an int data type and have received errors such as…

“Input string was not in a correct format.”

or…

“Field ‘ID’ does not have a default value’

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  1. Editorial Team
    Editorial Team
    2026-05-17T18:34:02+00:00Added an answer on May 17, 2026 at 6:34 pm

    In MySQL you can create a column and mention its properties as AUTO_INCREMENT and DEFAULT VALUE 1 (or whatever you wish), why don’t you use it?

    –Cheers

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