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complex-types

4 posts

2026-09-09 errors ef-core ef-core-11

Fix: Complex entry original ordinal '-1' is invalid when saving a ToJson complex collection

Upgrade Microsoft.EntityFrameworkCore to 10.0.10 or later. Before that, growing a nested collection under a second ToJson complex property crashed SaveChanges.

2026-09-09 errors ef-core ef-core-11

Fix: The complex type collection must be initialized to a non-null value

On EF Core 10.0.x, nulling a complex property that holds a two-element collection inside a ToJson complex collection breaks DetectChanges. Fixed in 11.0.0-rc.1.

2026-07-22 comparison complex-types owned-entities

Complex types vs owned entities in EF Core 11: which should you pick?

On EF Core 11, default to complex types for value objects and drop to owned entities only when you need a separate table or a collection mapped to its own rows.

2026-07-12 ef-core ef-core-11 complex-types

How to map a complex type instead of an owned entity in EF Core 11

Owned entities carry a hidden key and reference identity that fights value objects. Here is how to map a value object as a complex type in EF Core 11, when to switch, and the gotchas.