Svyatoslav Danyliv comments

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                                            Svyatoslav Danyliv

Entity Framework Core 5 - and LinqKit.Microsoft.EntityFrameworkCore 5.0.x not working with expressions in subqueries

This is EF Core limitation. With local collections it can do only `Contains` or VERY simple Any, which is not your case. Check my [SO answer](https://stackoverflow.com/a/67666993/10646316)

Entity Framework Core 5 - and LinqKit.Microsoft.EntityFrameworkCore 5.0.x not working with expressions in subqueries

You are not alone: https://github.com/dotnet/efcore/issues/19070

Consuming ExpandableQuery w/ Contains(...) leads to multiple Db hits

@a-stankevich, post reproducible sample and I’ll fix that.

Consuming ExpandableQuery w/ Contains(...) leads to multiple Db hits

@a-stankevich, well, Ii is not a bug. You have used `AsExpandable()` in Expression Lambda body. In this case LINQKit expander cannot be activated. You have to use `AsExpandable` on top...

LinqKit applying nested filtering through extension-method not working

@kuebelkasten, it is your question in SO?

LinqKit applying nested filtering through extension-method not working

Well, answer added: https://stackoverflow.com/a/66650693/10646316

LinqKit applying nested filtering through extension-method not working

It is not correct way of using Expandable attribute and is not original SO question.

LinqKit applying nested filtering through extension-method not working

Done.

LinqKit applying nested filtering through extension-method not working

Anyway, try to remove `Expand`, probably it may work also.

LinqKit applying nested filtering through extension-method not working

I need full call stack. Anyway, weird filtering technique.