I have a collection as below: sample {'_id': {'day': '2020-12-04', 'device': {'device': 'DH002'}}, 'value': {'average': 44.5, 'max': 50, 'min': 38}}
Issue a: Am trying to query this collection basis the date range inputted by user.The query is as below.The issue is that I get output only for the start date instead of the entire range upto the end date. Not sure what is wrong.
Issue b. If I wanted to add Device id as another query parameter,how can i do it..
extract = list( weather_dbh.dailyreports.aggregate([
{ "$match": {
"$expr": {
"$and": [
{
"$gte": [
{ "$dateFromString": { "dateString": "$_id.day", "format": "%Y-%m-%d" }},
start
]
},
{
"$lt": [
{ "$dateFromString": { "dateString": "$_id.day", "format": "%Y-%m-%d" }},
end
]
}
]
}
}}
]))
The following work as expected:
mongos> var start="2020-12-05"
mongos> var end="2020-12-06"
mongos> var thedevice="devid"
mongos> db.weather_dbh.dailyreports.aggregate([ {$match:{ deviceid:thedevice , $and:[ {"_id.day":{$gte:start}}, {"_id.day":{$lt:end }} ] } } ])
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