중첩 배열과 (산화 마그네슘) 통합 :Golang MongoDB를 나는 다음과 같은 형태의 MongoDB의 데이터가
{"_id":"53eb9a5673a57578a10074ec","data":{"statistics":{"gsm":[{"type":"Attacks","value":{"team1":66,"team2":67}},{"type":"Corners","value":{"team1":8,"team2":5}},{"type":"Dangerous attacks","value":{"team1":46,"team2":49}},{"type":"Fouls","value":{"team1":9,"team2":14}},{"type":"Free kicks","value":{"team1":18,"team2":10}},{"type":"Goals","value":{"team1":2,"team2":1}},{"type":"Goal kicks","value":{"team1":10,"team2":11}},{"type":"Offsides","value":{"team1":1,"team2":4}},{"type":"Posession","value":{"team1":55,"team2":45}},{"type":"Shots blocked","value":{"team1":4,"team2":1}},{"type":"Shots off target","value":{"team1":7,"team2":5}}]}}}
내가 data.statistics.gsm data.statistics.gsm.value.team1의 평균을 얻으려면을 .type == Golang MongoDB 드라이버 mgo를 사용하여 "공격"합니다. 코드 나는 (하나 또는 둘 모두 아래의 그룹 문 중 하나에) 지금까지 시도 :
pipeline := []bson.M{
bson.M{"$match": bson.M{"kick_off.utc.gsm.date_time": bson.M{"$gt": start, "$lt": end}}},
bson.M{
"$group": bson.M{
"_id": "$gsm_id",
"event_array" : bson.M{"$first": "$data.statistics.gsm"}}},
bson.M{
"$group": bson.M{
"_id": "$type",
"avg_attack" : bson.M{"$avg": "$data.statistics.gsm.value.team1"}}}}
을 첫 번째 그룹 문으로, 나는 아래 다시 얻을 수 있지만, 두 번째 그룹의 문은 저를 얻을 도움이되지 않습니다 평균.
[{"_id":1953009,"event_array":[{"type":"Attacks","value":{"team1":48,"team2":12}},{"type":"Corners","value":{"team1":12,"team2":0}},{"type":"Dangerous attacks","value":{"team1":46,"team2":7}},{"type":"Fouls","value":{"team1":10,"team2":3}},{"type":"Free kicks","value":{"team1":5,"team2":12}},{"type":"Goals","value":{"team1":8,"team2":0}}