Goal Determine how EF Core decides whether to create a foreign‑key column for an owned type that references a property of its owner. Constraints & uncertainty Owner property nullability influences FK nullability. Composite primary keys on the owner may change FK placement. Multiple owned types referencing the same owner property can produce ambiguous FK generation. Questions Does EF Core always generate a nullable FK column when the referenced owner property is nullable? How does a composite primary key on the owner affect whether the FK becomes part of the combined key or a separate column? What explicit configuration resolves ambiguous FK generation when several owned types reference the same owner property?

EF Core owned entity FK generation with nullable owner property

Owned entity foreign‑key column missing when owner property is nullable

0 reputation · 26 Oct 2024, 22:22 UTC

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Goal

Determine how EF Core decides whether to create a foreign‑key column for an owned type that references a property of its owner.

Constraints & uncertainty

Owner property nullability influences FK nullability.
Composite primary keys on the owner may change FK placement.
Multiple owned types referencing the same owner property can produce ambiguous FK generation.

Questions

Does EF Core always generate a nullable FK column when the referenced owner property is nullable?
How does a composite primary key on the owner affect whether the FK becomes part of the combined key or a separate column?
What explicit configuration resolves ambiguous FK generation when several owned types reference the same owner property?

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Owned entity foreign‑key column missing when owner property is nullable

Goal

Constraints & uncertainty

Questions

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