Hi,

I am trying to hook up a Mongo back-end to expose OData via WCF Data
Services.  For some reason when I run a query through the service such as:

http://localhost/odata/MyData()?$filter=substringof('New',Name)

An exception is thrown.  I have tracked it down to
protected virtual Expression VisitConditional(ConditionalExpression node)
in ExpressionVisitor.cs where data types do not match because one size of
the conditional is Boolean and the other is Nullable<Boolean>.

According to the debugger this is the expression getting processed:
.If ($it.Name == null) {
    null

Thanks,

If you are going to use the reflection provider, you will need to employ a
couple of tricks to make it work.  This is an issue with how WCF Data
Services interacts with an object model.  You can read about this here:
http://blog.davidebbo.com/2011/08/how-odata-quirk-killed-nuget-server....

Alternatively, I have written a project that handles this for you already
here: https://github.com/craiggwilson/mongo-dotnet-odata.  I'm still
working on Update support.  It is mostly finished, I just haven't finished
getting it fully tested, so you can pull the source.  If you don't need
updating, just go to nuget and pull down MongoDB.OData.

I did notice that the Linq queries are going through 2 different code paths
when I wrote a test app vs. getting the query via the WCF Data Service.  
Currently I am using the reflection provider, but I will likely have to
change that in the future to properly expose our data.

Thanks for the links.  I will be diving in soon (your project looks
interesting).