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Apr 29th, 2012 | syntax:
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EF Database First - Mapping-error 3025
Error 3025: ... :Must specify mapping for all key properties
(PurchaseUsers.PurchaseUsersId) of table PurchaseUsers.
Purchases Participants PurchaseUsers
PurchaseId ParticipantId PurchaseUsersId
... ... PurchaseId
ParticipantID
Unable to update the EntitySet 'PurchaseUsers' because it has a DefiningQuery
and no <InsertFunction> element exists in the <ModificationFunctionMapping> element
to support the current operation.