c# - Entity Framework Extensions: Can't BulkMerge entities with empty identity property

Question

I uses BulkMerge method of Entity Framework Extensions for insert/update large collections of entities. Entity table have identity column Id that used as a primary key. When I try to BulkMerge collection with several newly created entities (they have Id = 0 by default) it throws such exception: Violation of PRIMARY KEY constraint 'PK_Users'. Cannot insert duplicate key in object 'dbo.Users'. The duplicate key value is (0). Btw, BulkInsert method with same entities works fine. I tried to use options like AutoMapOutputDirection, InsertIfNotExists or MergeKeepIdentity but they were ineffective. Can anyone suggest the correct options for proper BulkMerge work or any other ways to solve issue?

Answer 1

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