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Editorial Team
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Asked: 2026-06-01T08:14:50+00:00

We are using EF 4.0 with code first approach. I have defined constraint for

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We are using EF 4.0 with code first approach. I have defined constraint for property length using attribute StringLength. I was under impression that SaveChanges for Context which tracks entity with data that is longer than specified constraint will throw validation exception.
But unfortunately it is not happen. If I do GetValidationErrors() before SaveChanges I see there expected error. Can someone shed some light how this stuff should work?

Update: Found where problem is. In order to track down entities which will be affected by SaveChanges we are using underlying ObjectContext of DBContext (through IObjectContextAdapter). SaveChanges has been invoked for ObjectContext, when I have switched to DBContext.SaveChanges issue has been resolved.

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  1. Editorial Team

    Found where problem is. In order to track down entities which will be affected by SaveChanges we are using underlying ObjectContext of DBContext (through IObjectContextAdapter). SaveChanges has been invoked for ObjectContext, when I have switched to DBContext.SaveChanges issue has been resolved.

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