how to change mongodb string to geoJSON point throughout the collection - mongodb

Question

I have a Mongodb collection parking_info and this is one document in the collection:
{
"_id" : ObjectId("559c152fa439a961c357f931"),
"POST_ID" : "354-20160",
"MS_ID" : "-",
"MS_SPACEID" : 0,
"CAP_COLOR" : "Grey",
"METER_TYPE" : "SS",
"SMART_METE" : "Y",
"ACTIVESENS" : "N",
"JURISDICTI" : "SFMTA",
"ON_OFF_STR" : "ON",
"OSP_ID" : 0,
"STREET_NUM" : 2016,
"STREETNAME" : "CHESTNUT ST",
"STREET_SEG" : 3.977e+006,
"RATEAREA" : "Area 5",
"SFPARKAREA" : "Marina",
"LOCATION" : "(37.8007983983, -122.4368696024)"
}
I need to convert the last field "LOCATION" : "(37.8007983983, -122.4368696024)"
here the order is latitude , then longitude.
to
"LOCATION" : { type: "Point", coordinates: [ -122.4368696024, 37.8007983983]},
The coordinate order is longitude, then latitude.
How can I apply that to all documents in the collection?

Answer 1

You can use the cursor method forEach() returned from the find() method to iterate the cursor, access the documents, and with each document modify the LOCATION field by using native JavaScript methods as in the following example:
db.parking_info.find({"LOCATION": {"$type": 2}}).forEach(function(doc){
var obj = {},
loc = [],
temp = doc.LOCATION.replace("(", "").replace(")", "");
loc = temp.split(",").map(function(point){
return parseFloat(point);
});
obj["type"] = "Point";
obj["coordinates"] = loc;
doc.LOCATION = obj;
db.parking_info.save(doc);
});