Is there a way to grab any query in RavenDB 4.0 either as an expression or as the lucene query?

[Bruno Lopes]

I want to be able to add something like ".Where(f => f._AllowedUserIds.Contains(currentUserId)" on all queries hitting indexes named Secure/Something.

Previously, on Raven 3.5, we had a server side extension which looked at the Lucene IndexQuery and added some extra clauses to filter out items.

On 4.0 there's no server side extensions, and the query that goes to ravendb is RQL.

Is there somewhere I can hook into to add the filters? I'm thinking perhaps adding it to the expression that's passed to the RavenQueryInspector which is then translated into RQL, since I don't see anywhere I could hook into the lucene query.

There's ".Customize(q => q.QueryOperation.IndexQuery.Query)", but that's the RQL query, which I dread of parsing to try and inject the where clauses (and I'm thinking there's no rql parser client side).

[Oren Eini (Ayende Rahien)]

You can use OnBeforeQueryExecuted event.

This has QueryCustomization, which give you the actual DocumentQuery / AsyncDocumentQuery that you can use to mutate the query before sending it

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[Bruno Lopes]

On 4.0?

I'm looking at

                store.OnBeforeQueryExecuted += (sender, args) =>
                {
                    args.QueryCustomization.BeforeQueryExecuted(q =>
                    {
                        Assert.Equal("Just dump this", q.Query);
                    });
                };

q.Query gives me RQL.

Am I looking at the wrong place?

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[Oren Eini (Ayende Rahien)]

Cast   args.QueryCustomization to IDocumentQuery<T> or IAsyncDocumentQuery<T> and use that

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[Bruno Lopes]

Awesome, that works even better than I expected. 

Would it make sense to have a non-generic IDocumentQuery that has the non-expression-based methods? (the ones that take strings instead of expressions)?

I'm doing a bit of reflection to call IDocumentQuery<T> and then ignoring the type itself since I'm working directly with the field names.

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[Oren Eini (Ayende Rahien)]

It _has_ just strings API there, IIRC, no?

The problem is that we need to be able to call ToList() on that.

[Bruno Lopes]

It has the strings api. But since I'm doing this for "all" requests, I don't know upfront what the T in IDocumentQuery<T> is.  

I was "asking" for methods like 

- TSelf ContainsAny(string fieldName, IEnumerable<object> values);

- TSelf Search(string fieldName, string searchTerms, SearchOperator @operator = SearchOperator.Or);

To be on non-generic interfaces.

[Oren Eini (Ayende Rahien)]

Hm... Can you send a PR for that?

[Bruno Lopes]

I can look into it, sure.