C#C
C#•3y ago
sl8er

EF Core Many-to-One (Many Owned Entity to Non-owned Entity)

In the context of a multi-tenant application, I want to design an aggregate like so - a root Customer has a List<Address>, Address being an owned type. A Customer also references a Tenant. If I also want Address to reference a Tenant, it seems EF Core isn't happy when trying to configure a Tenant like so:

// This is fine.
builder
    .HasMany<Customer>()
    .WithOne(x => x.Tenant)
    .HasForeignKey("tenant_id")
    .IsRequired()
    .OnDelete(DeleteBehavior.Restrict);

// This throws - System.InvalidOperationException: The entity type 'Address' cannot be configured as non-owned because it has already been configured as a owned. Use the nested builder in `OwnsOne` or `OwnsMany` on the owner entity type builder to further configure this type. If you want to override previous configuration first remove the entity type from the model by calling 'Ignore'.
builder
    .HasMany<Address>()
    .WithOne(x => x.Tenant)
    .HasForeignKey("tenant_id")
    .IsRequired()
    .OnDelete(DeleteBehavior.Restrict);
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