Is there a way to use geoWithin? about mongodb.entities

[dj-nitehawk]

hi there...

only $near and $geoNear has been implemented so far.

you can use string templates in the meantime or simply import the mongodb official namespaces and use the driver features. the official driver is included in MongoDB.Entities so no need to install it seperately.

[renato04]

Thank you for responding to me.
One more question.

I'm following this tutorial and I don't know how to represent the Neighborhood object with the geospatial point object.

I'm creating a class for that, is there a geospatial object?

Thanks again.

[dj-nitehawk]

I think you represent a neighborhood with a polygon and a restaurant with a point.

this library currently only has direct support for finding places within a given radius. see the following tutorial https://dev.to/djnitehawk/tutorial-geospatial-search-in-mongodb-the-easy-way-kbd

I'll see what I can do to implement the rest of geo stuff in the coming days.

in the meantime you might want to post on stack overflow asking how to do it using the c# driver.

[renato04]

Cool!

Thank you!

I found a way to implement it! I don't know if it is the best way but it is working.

    public abstract class GeoLocation<T>
    {
        public virtual string type { get; set; }
        public T coordinates { get; set; }
    }

    public class Polygon : GeoLocation<IEnumerable<IEnumerable<double[]>>>
    {
        public override string type { get; set; } = "Polygon";
    }

    public class Point : GeoLocation<double[]>
    {
        public override string type { get; set; } = "Point";

        public override string ToString()
        {
            return $"[{string.Join(',', coordinates)}]";
        }
    }

    public class Neighborhoods : Entity
    {
        public  string name { get; set; }
        public Polygon geometry { get; set; }
    }

    public class Restaurants : Entity
    {
        public string name { get; set; }
        public Point location { get; set; }
    }

        private static void Main(string[] args)
        {
            new DB("MyDatabase", "localhost", 27017);

            var result = DB.Find<Neighborhoods>().One("55cb9c666c522cafdb053a68");
            Console.WriteLine($"Found Neighborhood: {result.name}");

            var restaurant = DB.Find<Restaurants>().One("55cba2476c522cafdb053add");
            Console.WriteLine($"Found Restaurant: {restaurant.name}");

            var point = new Point { coordinates = new double[] { -73.93414657, 40.82302903 } };
            var pipeline = new Template<Neighborhoods>(
                    @"[
                        {$match:{ <geometry>: { $geoIntersects: { $geometry: { type: 'Point', coordinates: <neighborhood_coord> } } } }}
                    ]"
                )
                .Tag("neighborhood_coord", point.ToString())
                .Path(p => p.geometry);

            var aggregateResult = DB.Aggregate(pipeline)
                    .ToList();

            Console.Read();
        }

[dj-nitehawk]

yep this looks good.
well done!