Update modified fields only

[t-denis]

Hi, just found your awesome library. Thanks for great work.

Is it a bug or by design, that Breeze updates the entire db row, not just the modified fields?
Since it roundtrips original values, I suppose that the partial update scenario should be supported.
But it sets modified state for the entire EntityEntry, that leads to the entire row update,

Using ASP.Net Core 2.2 + EF Core 2.2.

[ganySA]

@t-denis did you manage to get the .expand() functionality to work?

[t-denis]

Not used expand() functionality.
My issue was related to marking whole entity as modified rather then marking specific properties as dirty (like RIA Services does, I believe).

breeze.server.net/AspNetCore/Breeze.Persistence.EFCore/EFPersistenceManager.cs

Line 301 in c05cb2f

MarkEntryAndOwnedChildren(entry, Microsoft.EntityFrameworkCore.EntityState.Modified);

[dean-shanghai]

@t-denis have you found the solution yet?

[t-denis]

@dean-yang
The solution is well-known, mark properties as dirty instead of marking an entity, but I haven't created a PR.