如何将以下聚合查询转换为bson并在golang中执行

Question

这是我想要从代码中运行的以下查询。

db.apnSummary.aggregate"$delivery"｝，"failed"：{"$sum"："$failed"}，"freqDrop"：｛"$sum&"："$sreqDrop"}，"；公开"：{"$sum"："$published"}；发送"：{"$sum"："$sended"}}(；

根据代码准备的查询：-

[{"$match":{"date":{},"mid":{"$in":[81]}}},{"$group":{"_id":"$mid","clicked":{"$sum":"$open"},"delivered":{"$sum":"$delivered"},"failed":{"$sum":"$failed"},"freqDrop":{"$sum":"$freqDrop"},"published":{"$sum":"$published"},"sent":{"$sum":"$sent"}}}]

当我执行这个查询时，我会得到结果，但当我从代码中进行查询时，它不会为我提供结果。结果给出了空白数据。我的代码如下：-

func GetApnDataFromMongo(data utils.Data, clientName string) (utils.Results, error) {
result := utils.Results{}
date := bson.M{}
messageId := bson.M{}
if len(data.MessageId) > 0 {
messageId = bson.M{"$in": convertToInt(data.MessageId)}
}
if data.DateFrom != "" && data.DateTo != "" {
date = bson.M{"$gte": data.DateFrom, "$lte": data.DateTo}
}
primary_collection := bson.M{"$match": bson.M{"mid": messageId, "date": date}}
group_collection := bson.M{"$group": bson.M{"_id": "$mid", "published": bson.M{"$sum": "$published"}, "sent": bson.M{"$sum": "$sent"}, "failed": bson.M{"$sum": "$failed"}, "freqDrop": bson.M{"$sum": "$freqDrop"}, "delivered": bson.M{"$sum": "$delivered"}, "clicked": bson.M{"$sum": "$open"}}}
fullquery := []bson.M{primary_collection, group_collection}
jsonString, _ := json.Marshal(fullquery)
logrus.Info(fmt.Sprintf("Final query prepared is as following %+v", string(jsonString)))
ctx := context.Background()
conn, err := utils.GetMongoConnection()
if err != nil {
logrus.Errorf("Error connecting to mongo %+v", err)
return result, err
}
logrus.Info("clientName %+v", clientName)
resultData, err := conn.Database(clientName).Collection("apnSummary").Aggregate(ctx, mongo.Pipeline(primary_collection, group_collection))
if err != nil {
logrus.Errorf("Error querying %+v", err)
return result, err
}
mongodata := []utils.MonogResponse{}
resultData.All(ctx, &mongodata)
fmt.Println(mongodata)
result = PrepareMongoResponse(mongodata)
return result, nil
}
func PrepareMongoResponse(data []utils.MonogResponse) utils.Results {
result := utils.Results{}
for _, res := range data {
result.Failure.Mid = append(result.Failure.Mid, res.Mid)
result.Delivered.Mid = append(result.Delivered.Mid, res.Mid)
result.Frequency.Mid = append(result.Frequency.Mid, res.Mid)
result.Sent.Mid = append(result.Sent.Mid, res.Mid)
result.Click.Mid = append(result.Click.Mid, res.Mid)
result.Failure.Count = append(result.Failure.Count, res.Failed)
result.Delivered.Count = append(result.Delivered.Count, res.Delivered)
result.Frequency.Count = append(result.Frequency.Count, res.FreqDrop)
result.Sent.Count = append(result.Sent.Count, res.Sent)
result.Click.Count = append(result.Click.Count, res.Clicked)
}
return result
}
func convertToInt(data []string) []int {
intData := []int{}
for _, dt := range data {
intV, _ := strconv.Atoi(dt)
intData = append(intData, intV)
}
return intData
}

Answer 1

如果缺少date筛选器，请不要添加"date": {}筛选器，该筛选器用于筛选"date"为空对象的文档，这在您的情况下显然不适用。如果您没有日期过滤器，请将date从$match阶段中删除！

messageID和所有其他过滤器也是如此。

你可以这样做：

matchDoc := bson.M{}
if len(data.MessageId) > 0 {
matchDoc["mid"] = bson.M{"$in": convertToInt(data.MessageId)}
}
if data.DateFrom != "" && data.DateTo != "" {
matchDoc["date"] = bson.M{"$gte": data.DateFrom, "$lte": data.DateTo}
}
primary_collection := bson.M{"$match": matchDoc}

注意：您的原始查询之所以有效，是因为您在其中省略了date:{}筛选器！