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Use shared-type entity types instead of entity types with defining navigation. #23586

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merged 4 commits into from
Dec 8, 2020

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AndriySvyryd
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They should behave mostly the same, except that DefiningEntityType and DefiningNavigationName will return null and Name will return what FullName returned previously.

Fixes #22378

@AndriySvyryd AndriySvyryd requested a review from a team December 4, 2020 20:25
@@ -322,11 +253,6 @@ public virtual void UpdateIsKeylessConfigurationSource(ConfigurationSource confi
return newBaseType;
}

if (HasDefiningNavigation())
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Does this enable former entity type with defining navigations to have hierarchy?

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Technically you can specify a base type for a STET, but we don't have Fluent API for it, nor support

?? (entityType.HasSharedClrType
? entityType.FindOwnership() is ForeignKey ownership
? FindActualEntityType(ownership.PrincipalEntityType)
?.FindNavigation(ownership.PrincipalToDependent!.Name)?.TargetEntityType
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💡 If FK has flag for ownership then may be can annotate that PrincipalToDependent is non-null when flag is true.

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Do you know how?

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[CA.MemberNotNullWhen(false, nameof(Arguments), nameof(ArgumentsPropagateNullability))]

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If I put [CA.MemberNotNullWhen(true, nameof(PrincipalToDependent))] on IsOwnership it doesn't help even if I use entityType.GetForeignKeys().FirstOrDefault(fk => fk.IsOwnership) instead of entityType.FindOwnership. I don't think the compiler is smart enough

…vigation.

They should behave mostly the same, except that DefiningEntityType and DefiningNavigationName will return true and Name will return what FullName returned previously

Fixes #22378
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Replace entity types with defining navigation with shared-type entity types
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