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POEntity framework update object and change reference
 

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    <p>I'm trying to make update on CustomerRailcard object which has a reference on Railcard object with end * to 1. The problem is, that I cannot delete Railcard object, I have to only change reference on CustomerRailcard object to another RailcardObject. I'm doing it like this:</p> <p>UPDATE:</p> <pre><code>// Updating properties in existing CustomerRailcard. // This won't update navigation properties (Railcard). context.ObjectStateManager.ChangeObjectState(existingCustomerRailcard, EntityState.Modified); context.ApplyCurrentValues("CustomerRailcardsDbo", newCustomerRailcard); // Now I'm trying to update navigation property of CustomerRailcard to the Railcard // by removing the reference from old Railcard to CustomerRailcard. // Railcard can have references to many CustomerRailcards. var oldRailcard = railcardRepository.FindById(customerDetails.CustomerRailcards.FirstOrDefault(r =&gt; r.Id == railcard.Id).Railcard.Id); var customerRailcardToRemove = oldRailcard.CustomerRailcards.FirstOrDefault(cr =&gt; cr.Id == railcard.Id); // Removing reference to CustomerRailcard from Railcard oldRailcard.CustomerRailcards.Remove(customerRailcardToRemove); // Now I'm getting new Railcard I want to have referenced by CustomerRailcard // and I'm changing its reference tu CustomerRailcard var newRailcard = railcardRepository.FindById(railcard.Railcard.Id); // Adding reference to CustomerRailcard newRailcardDboReference.CustomerRailcards.Add(railcard); </code></pre> <p>After running this I'll get this error</p> <p>A relationship from the 'CR_RL_FK' AssociationSet is in the 'Deleted' state. Given multiplicity constraints, a corresponding 'CustomerRailcardDbo' must also in the 'Deleted' state.</p> <p>How else should I perform update on this kind of relationship?</p>
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