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POAn object with the same key already exists in the ObjectStateManager. The ObjectStateManager cannot track multiple objects with the same key
 

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  1. POAn object with the same key already exists in the ObjectStateManager. The ObjectStateManager cannot track multiple objects with the same key
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    <p>Using EF5 with a generic Repository Pattern and ninject for dependency injenction and running into an issue when trying to update an entity to the database utilizing stored procs with my edmx. </p> <p>my update in DbContextRepository.cs is:</p> <pre><code>public override void Update(T entity) { if (entity == null) throw new ArgumentException("Cannot add a null entity."); var entry = _context.Entry&lt;T&gt;(entity); if (entry.State == EntityState.Detached) { _context.Set&lt;T&gt;().Attach(entity); entry.State = EntityState.Modified; } } </code></pre> <p>From my AddressService.cs which goes back to my repository I have:</p> <pre><code> public int Save(vw_address address) { if (address.address_pk == 0) { _repo.Insert(address); } else { _repo.Update(address); } _repo.SaveChanges(); return address.address_pk; } </code></pre> <p>When it hits the Attach and EntityState.Modified it pukes with the error:</p> <p><strong>An object with the same key already exists in the ObjectStateManager. The ObjectStateManager cannot track multiple objects with the same key.</strong></p> <p>I have looked through many of the suggestions in stack and on the Internet and not coming up with anything that resolves it. Any work arounds would be appreciated.</p> <p>Thanks!</p>
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