MongoDB & Filter on Boolean property: the "_not" filter throws an exception

[gmiserez]

While using the new HotChocolate PRISMA-inspired Filter package on top of a Mongo database I encountered the following error when using the booleanProperty_not Filter:

({document}{IsCapitalCity} == False) is not supported.

In short, this works:

{
  cities(where: { isCapitalCity: true }){
    name
  }
}

while this does not:

{
  cities(where: { isCapitalCity_not: false }){
    name
  }
}

Note: This works:

{
  cities(where: { isCapitalCity: false }){
    name
  }
}

To Reproduce
Declare the following query type:

    public class QueryType: ObjectType
    {
        protected override void Configure(IObjectTypeDescriptor descriptor)
        {
            descriptor.Name("Query");
            descriptor.Field("cities")
                .Resolver(ctx => ctx.Service<IMongoCollection<City>>().AsQueryable())
                .UseFiltering<CityFilterType>();
        }
    }

And initialize the City collection in the services:

            services.AddSingleton(sp =>
            {
                var client = new MongoClient();
                IMongoDatabase database = client.GetDatabase(
                    "db_" + Guid.NewGuid().ToString("N"));
                IMongoCollection<City> collection
                    = database.GetCollection<City>("col");
                collection.InsertMany(new[]
                {
                    new City(1, "Amsterdam", "nl", true),
                    new City(2, "Berlin", "de", true),
                    new City(3, "Paris", "fr", true),
                    new City(4, "Zürich", "ch", false)
                });
                return collection;
            });

I commited a sample repo here: https://github.com/gmiserez/HotChocolate_BooleanNotFilterAgainstMongo
(needs a local Mongo instance listening to port 27017)

Expected behavior
cities(where: { isCapitalCity_not: false }) should return the same result set than cities(where: { isCapitalCity: true })

Packages:

• HotChocolate.* 11.0.0-preview.4
• MongoDB.Driver 2.8.1

[michaelstaib]

This one is now fixed #1170