entity-framework-5 - Entity framework invalid column discriminator even if Entity.Map().Map specified

Question

I have TPH inheritance. In OnModelCreating I specify mapping like this:

modelBuilder.Entity<Parent>()
   .Map<Child1>(m=>m.Requires("TypeCode").HasValue("A"))
   .Map<Child2>(m=>m.Requires("TypeCode").HasValue("B"))
   ...

However when I try to run the query

Parents.OfType<Child1>()

I get an error 'Invalid column discriminator'. When debugging I can see it runs the code in OnModelCreating... It seems like EF is ignoring Map definitions?

Answer 1

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