Try EF Core 9 now!

[ajcvickers]

EF Core release notes for each version can be found in the GitHub Releases page.

You can try EF 9 before it goes GA using the daily builds or a preview release:

• Release notes for EF Core 9 preview 1

This issue is for general discussion around the EF Core 9 preview releases. See What's New in EF Core 9 for details on new features introduced as the EF9 work progresses.

[erpardeepkaushik]

official support for IndexedDB will be superb for offline use case in blazor wasm apps. there are many packages but official one will be amazing.

https://github.com/Jinjinov/IndexedDB.Blazor
https://github.com/Reshiru/Blazor.IndexedDB.Framework

[sajjadarashhh]

official support for IndexedDB will be superb for offline use case in blazor wasm apps. there are many packages but official one will be amazing.

https://github.com/Jinjinov/IndexedDB.Blazor https://github.com/Reshiru/Blazor.IndexedDB.Framework

that would be very nice if we have them...

[tuespetre]

Hey everyone, it's been a while... I just wanted to pop in to say you folks have been killing it. Last year I tried to revisit my query compiler project and update it for test and feature parity with EF Core just for fun, and I was blown away with how much EF Core has grown to support. I couldn't imagine having to use another ORM, and I am thankful for what you do as well as your receptiveness to my contributions those years ago.

[roji]

Thank you @tuespetre!!

[caleblloyd]

Love these new Migration behaviors!

• Implement database locking for migrations #33731
• Stop all migrations and roll back everything on failure #22616

I was just starting to write the usual hackery to achieve this outside the library when, much to my delight, I discovered these. I'm sure you are already planning on adding it but should definitely mention those in the What's New docs. And as always, great work!

[jamo-semler]

How do we migrate to this new behavior regarding replacement of Discriminator to $type (#34269).

A updated solution just gets:

"Unable to materialize entity instance of type 'MyType'. No discriminators matched the discriminator value ''."

[roji]

@jamo-semler it seems like you're asking how to access existing documents, which were created with earlier versions of EF, and so have a Discriminator property instead of `$type. If so, please read this breaking change note (the doc update isn't yet live, but this doc PR already contains the info).

Please let me know if that's clear and resolves things for you!

[jamo-semler]

@roji that worked perfectly.

For others arriving here the fix to revert to pre EF Core 9.0 behavior is to add these to the EntityTypeBuilder:

modelBuilder.Entity<SomeType>(builder => { builder.HasDiscriminator<string>("Discriminator"); builder.HasDiscriminatorInJsonId(); })