@FetchAll property wrapper not working in Reducers for swift-dependencies >= 1.10.1

[OddMagnet]

Description

Before swift-dependencies 1.10.1 and greater I was able to have a TCA Reducer with a @FetchAll property, which would work as expected when used in a preview.

After updating to 1.10.1 or newer this doesn't work anymore.

I noticed this when I set up a new project and couldn't get the same behavior as in an older project, see this Discussion: pointfreeco/sqlite-data#395

Checklist

• I have determined whether this bug is also reproducible in a vanilla SwiftUI project.
• If possible, I've reproduced the issue using the main branch of this package.
• This issue hasn't been addressed in an existing GitHub issue or discussion.

Expected behavior

FetchAll in a Reducer also works in Previews

Actual behavior

FetchAll in a Reducer does not work in Previews

Steps to reproduce

1. Check out this example repository: https://github.com/OddMagnet/swift-dependencies-bug-example
2. Build and verify that the FetchAll works in preview
3. Change swift-dependencies version to 1.10.1
4. Trust Macros again, build and try to view the preview
5. Preview does not show the fetched data anymore

Dependencies version information

1.10.1

Destination operating system

iOS 26.2

Xcode version information

26.2

Swift Compiler version information

swift-driver version: 1.127.15 Apple Swift version 6.2.4 (swiftlang-6.2.4.1.4 clang-1700.6.4.2)
Target: arm64-apple-macosx26.0

[mbrandonw]

Hi @OddMagnet, thanks for the repro! That helps a lot, and it seems related to #412. We'll take a look soon!

[mbrandonw]

Also, FWIW, a workaround for this right now is to just wrap your prepareDependencies in the entry point with if context == .live. That's something we've always recommended, but we thought #412 would make it unnecessary.

[OddMagnet]

Yea, after going through the changes I came to the same conclusion. I already had the if context == .live in my new app, but that didn't help.

When I use withDependencies in the #Preview it works:

    withDependencies {
        try! $0.bootstrapDatabase()
    } operation: {
        MyView(store: Store(...))
    }

[OddMagnet]

Any news on this?