public static IQueryable <TEntity> SearchGeoNear <TEntity, TCoordinates>(this IMongoDbSet <TEntity> dbSet, Expression <Func <TEntity, object> > targetField, GeoJsonPoint <TCoordinates> point, Expression <Func <TEntity, object> > distanceResultField = null, double?maxDistance = null, double?minDistance = null) where TEntity : class where TCoordinates : GeoJsonCoordinates
{
var entitySerializer = BsonSerializer.LookupSerializer <TEntity>();
var keyExpressionField = new ExpressionFieldDefinition <TEntity>(targetField);
var keyStringField = keyExpressionField.Render(entitySerializer, BsonSerializer.SerializerRegistry);
var distanceFieldName = "Distance";
if (distanceResultField != null)
{
var distanceResultExpressionField = new ExpressionFieldDefinition <TEntity>(distanceResultField);
var distanceResultStringField = distanceResultExpressionField.Render(entitySerializer, BsonSerializer.SerializerRegistry);
distanceFieldName = distanceResultStringField.FieldName;
}
var geoNearSettings = new BsonDocument
{
{ "near", point.ToBsonDocument() },
{ "key", keyStringField.FieldName },
{ "distanceField", distanceFieldName },
//Note: Limit here is maxed as an operational courtesy as future versions will eliminate it (see Jira SERVER-22949)
// Additionally, $geoNear operations still have a 16MB document limit in aggregation (see Jira SERVER-18965)
{ "limit", int.MaxValue }
};
if (maxDistance.HasValue)
{
geoNearSettings.Add("maxDistance", maxDistance.Value);
}
if (minDistance.HasValue)
{
geoNearSettings.Add("minDistance", minDistance.Value);
}
var stage = new BsonDocument
{
{ "$geoNear", geoNearSettings }
};
var originalProvider = dbSet.Provider as IMongoFrameworkQueryProvider <TEntity>;
var provider = new MongoFrameworkQueryProvider <TEntity>(originalProvider, stage);
return(new MongoFrameworkQueryable <TEntity>(provider));
}
public static IQueryable <TEntity> SearchGeoNear <TEntity, TCoordinates>(this IMongoDbSet <TEntity> dbSet, Expression <Func <TEntity, object> > targetField, GeoJsonPoint <TCoordinates> point, Expression <Func <TEntity, object> > distanceResultField = null, double?maxDistance = null, double?minDistance = null) where TEntity : class where TCoordinates : GeoJsonCoordinates
{
var entitySerializer = BsonSerializer.LookupSerializer <TEntity>();
var keyExpressionField = new ExpressionFieldDefinition <TEntity>(targetField);
var keyStringField = keyExpressionField.Render(entitySerializer, BsonSerializer.SerializerRegistry);
var distanceFieldName = "Distance";
if (distanceResultField != null)
{
var distanceResultExpressionField = new ExpressionFieldDefinition <TEntity>(distanceResultField);
var distanceResultStringField = distanceResultExpressionField.Render(entitySerializer, BsonSerializer.SerializerRegistry);
distanceFieldName = distanceResultStringField.FieldName;
}
var geoNearSettings = new BsonDocument
{
{ "near", point.ToBsonDocument() },
{ "key", keyStringField.FieldName },
{ "distanceField", distanceFieldName }
};
if (maxDistance.HasValue)
{
geoNearSettings.Add("maxDistance", maxDistance.Value);
}
if (minDistance.HasValue)
{
geoNearSettings.Add("minDistance", minDistance.Value);
}
var stage = new BsonDocument
{
{ "$geoNear", geoNearSettings }
};
var originalProvider = dbSet.Provider as IMongoFrameworkQueryProvider <TEntity>;
var provider = new MongoFrameworkQueryProvider <TEntity>(originalProvider, stage);
return(new MongoFrameworkQueryable <TEntity>(provider));
}