A dependent property in a ReferentialConstraint is mapped to a store-generated column

Question

I get this error when writing to the database:

A dependent property in a ReferentialConstraint is mapped to a store-generated column. Column: \'Paym

Answer 1

My problem was caused by redundant defining of the Primary key in the configuration.

this
   .Property(p => p.Id)
   .HasColumnName(@"id")
   .IsRequired()
   .HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity) // this is redundant when you want to configure a One-to-Zero-or-One relationship
   .HasColumnType("int");

Remove this line

.HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity)

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Example http://www.entityframeworktutorial.net/code-first/configure-one-to-one-relationship-in-code-first.aspx

This is enough to define the relationship

// Configure Student & StudentAddress entity
modelBuilder.Entity()
            .HasOptional(s => s.Address) // Mark Address property optional in Student entity
            .WithRequired(ad => ad.Student); // mark Student property as required in StudentAddress entity. Cannot save StudentAddress without Student