MongoDB can't parse query (2dsphere): two conditions - mongodb

Question

I have the following object in my Collection:
{
"_id":"test123",
"footprint":{
"type":"Polygon",
"coordinates":[
[
[10, 30], [20, 45], [38, 38], [43, 38], [45, 30], [10, 30]
]
]
}
}
with index of type "2dsphere" on "footprint" attribute.
Now, I would like to implements the geospatial query "overlaps", as implemented by ST_Overlaps in PostGIS: https://postgis.net/docs/ST_Overlaps.html.
Due to the fact that MongoDB doesn't support "overlap" natively (only within, intersect and near) and according to the above definition, I whould return all overlapping documents not totally within the search area.
Therefore, I'm trying to execute the following filter:
{
"footprint":{
"$geoIntersects":{
"$geometry":{
"type":"Polygon",
"coordinates":[
[
[
41.62109375000001,
38.087716380862716
],
[
41.870727539062514,
37.998201197578084
],
[
41.72393798828124,
38.01268326428104
],
[
41.62109375000001,
38.087716380862716
]
]
]
}
},
"$not":{
"$geoWithin":{
"$geometry":{
"type":"Polygon",
"coordinates":[
[
[
41.62109375000001,
38.087716380862716
],
[
41.870727539062514,
37.998201197578084
],
[
41.72393798828124,
38.01268326428104
],
[
41.62109375000001,
38.087716380862716
]
]
]
}
}
}
}
}
But I get the following error:
can't parse extra field: $not: { $geoWithin: { $geometry: { type: "Polygon", coordinates: [ [ [ 41.62109375000001, 38.08771638086272 ], [ 41.87072753906251, 37.99820119757808 ], [ 41.72393798828124, 38.01268326428104 ], [ 41.62109375000001, 38.08771638086272 ] ] ] } } }
After several tests, it seems I can't execute a second filter on the same attribute.
Am I wrong? Is there any workaround?
Thanks

Answer 1

This is due to the query language and how it parses objects, the object you're trying to use looks like this:
{ key: { query1, query2 }}
Where query1 is $geoIntersects and query2 is $not which is just not a valid structure, what you can do is wrap both of them with an $and query like so:
{
$and: [
{
"footprint": {
"$geoIntersects": {
"$geometry": {
"type": "Polygon",
"coordinates": [
[
[
41.62109375000001,
38.087716380862716
],
[
41.870727539062514,
37.998201197578084
],
[
41.72393798828124,
38.01268326428104
],
[
41.62109375000001,
38.087716380862716
]
]
]
}
}
}
},
{
footprint: {
"$not": {
"$geoWithin": {
"$geometry": {
"type": "Polygon",
"coordinates": [
[
[
41.62109375000001,
38.087716380862716
],
[
41.870727539062514,
37.998201197578084
],
[
41.72393798828124,
38.01268326428104
],
[
41.62109375000001,
38.087716380862716
]
]
]
}
}
}
}
}
]
}