BadLinqExpressionException for nested lists after dotnet 8 migration

[xvrlsc]

Hello! We are migrating our project from dotnet 6 to dotnet 8 so we upgraded Marten from v6.4.1 to v7.26.2. Following this migration we now have the following error:

BadLinqExpressionException
Marten does not (yet) support contains queries through collections of element type <dotnetObject>

And here is the concerned code that was working well before:

session.Query<DbObject>().Where(x => x.nestedReadOnlyCollection.ToList().Contains(someSearchedValue);

Thank you for your help on this.

[jeremydmiller]

@xvrlsc Need a little more information. Most likely, it's the usage of ToList() up above that's causing the issue. What type is nestedReadOnlyCollection?

Can you just use:

session.Query<DbObject>().Where(x => x.nestedReadOnlyCollection.Contains(someSearchedValue);

[xvrlsc]

Hello @jeremydmiller. Sadly it does not work either without the ToList(). We have the same behaviour.
The type of the nestedReadOnlyCollection is System.Collections.Generic.IReadOnlyCollection