Question

我正在尝试使用类型为[]map[string]interface{}的地图中的MGO从我的MongoDB接收数据

我的JSON看起来像这样 -

{
   "_id":"string",
   "brandId":123,
   "category":{
      "television":[
         {
            "cat":"T1",
            "subCategory":[
               {
                  "subCat":"T1A TV",
                  "warrantyPeriod":6
               }
            ],
            "warrantyPeriod":12
         },
         {
            "cat":"T2",
            "subCategory":[
               {
                  "subCat":"T2A",
                  "warrantyPeriod":18
               },
               {
                  "subCat":"T2B",
                  "warrantyPeriod":9
               }
            ],
            "warrantyPeriod":15
         },
         {
            "cat":"T3",
            "subCategory":[
               {
                  "subCat":"T3A",
                  "warrantyPeriod":3
               },
               {
                  "subCat":"T3B",
                  "warrantyPeriod":5
               },
               {
                  "subCat":"T3C",
                  "warrantyPeriod":7
               },
               {
                  "subCat":"T3D",
                  "warrantyPeriod":11
               }
            ],
            "warrantyPeriod":4
         }
      ],
      "television_warrantyPeriod":24
   },
   "title":"BrandName"
}

我最好传递类别名称，即电视＆＃39;以及可能是可选的cat和subCat值。

例如像这样的东西 -

{
"categorySlug": "television",
"brandId": "123",
"model": "T2"
}

在这种情况下，我希望找到＆＃39; 15＆＃39;如果没有指定T2A或T2B，则为T2的warrantyPeriod值。

我的查询功能如下所示 -

var data map[string]string
err := json.NewDecoder(r.Body).Decode(&data)
log.Println(err)
var buffer bytes.Buffer
buffer.WriteString("category.")
buffer.WriteString(data["categorySlug"])
brandId, _ := strconv.Atoi(data["brandId"])
concernedbrandandcategory := database.GetMappedFields("Brands", bson.M{"brandId": brandId, buffer.String(): bson.M{"$exists": true}}, bson.M{buffer.String(): 1})
categorymap := concernedbrandandcategory[0]
log.Println(categorymap["category"]["television"], reflect.TypeOf(categorymap))

我的GetMappedFields函数看起来像这样 -

func GetMappedFields(collectionName string, query interface{}, selector interface{}) (result []map[string]interface{}) {
    MgoSession.DB(Dbname).C(collectionName).Find(query).Select(selector).All(&result)
    return
}

我只是无法绕过这个嵌套结构，有时会返回一个地图，有时会返回一个界面！任何帮助将非常感谢！

Answer 1

你可以做这样的事情

    majorCat := body["categorySlug"]
    category := body["category"]
    subCategory := body["subCategory"]
    brandId, err := strconv.Atoi(body["brandId"])
    if err != nil {
        log.Println(err)
    }
    result := database.GetMappedFields("Brands", bson.M{"brandId": brandId}, bson.M{"category": 1, "_id": 0})
    internalObj := result[0]["category"].(map[string]interface{})
    finalValue := internalObj["television_warrantyPeriod"]
    if category != "" {
        for _, v := range internalObj[majorCat].([]interface{}) {
            subObj := v.(map[string]interface{})
            if subObj["cat"] == category {
                finalValue = subObj["warrantyPeriod"]
                if subCategory != "" {
                    minorObj := subObj["subCategory"].([]interface{})
                    for _, iter := range minorObj {
                        kevVal := iter.(map[string]interface{})
                        if kevVal["subCat"] == subCategory {
                            finalValue = kevVal["warrantyPeriod"]
                        }
                    }
                }
            }
        }
    }

希望这会动态完成，或者您可以创建一个结构，以便可以直接将其解码为欢呼声

Golang从MongoDB的嵌套json数据映射中找到一个值

1 个答案: