Question

我写了一些基本代码，目的是使用mongodb（官方）驱动程序创建一个存储支持的计数器集合。代码存在一些问题。

当我尝试使用之前的值时，它不会更新文档。
非常详细。

我在这里发布这个用例，希望得到一个暗示导致问题的原因，以及是否有一个更优雅/简洁的方式来解决package main import ( "fmt" "log" "context" "github.com/mongodb/mongo-go-driver/bson" "github.com/mongodb/mongo-go-driver/mongo" ) func check(e error) { if e != nil { log.Fatal(e) } } func main() { monday := map[string]int64{ "Cumulus": 1, "Stratus": 2, "Stratocumulus": 4, "Altocumulus": 1, "Nimbostratus": 3, "Altostratus": 2, "Cirrocumulus": 2, "Cirrostratus": 1, "Cirrus": 1, "Cumulonimbus": 0, } sunday := map[string]int64{ "Cumulus": 0, "Stratus": 1, "Stratocumulus": 3, "Altocumulus": 2, "Nimbostratus": 2, "Altostratus": 1, "Cirrocumulus": 3, "Cirrostratus": 2, "Cirrus": 0, "Cumulonimbus": 2, } days := []map[string]int64{sunday, monday} client, err := mongo.Connect(context.Background(), "mongodb://localhost:27017", nil) check(err) db := client.Database("weather") coll := db.Collection("clouds") for _, today := range days { clouds := today for name, count := range clouds { v := bson.NewDocument() if err := coll.FindOne( context.Background(), bson.NewDocument( bson.EC.String("name", name), ), ).Decode(v); err == mongo.ErrNoDocuments { _, err := coll.InsertOne( context.Background(), bson.NewDocument( bson.EC.String("name", name), bson.EC.Int64("qty", count), ), ) check(err) } else { prev := v.Lookup("qty").Int64() _, err := coll.UpdateOne( context.Background(), bson.NewDocument( bson.EC.String("item", name), ), bson.NewDocument( bson.EC.SubDocumentFromElements("$inc", bson.EC.Int64("qty", prev + count), ), ), ) check(err) } } } cursor, err := coll.Find( context.Background(), bson.NewDocument(), ) doc := bson.NewDocument() for cursor.Next(context.Background()) { doc.Reset() err := cursor.Decode(doc) check(err) name := doc.Lookup("name").StringValue() qty := doc.Lookup("qty").Int64() fmt.Println(name, qty) }＆amp;当密钥不存在时for _, today := range days { clouds := today for name, count := range clouds { var opts []option.UpdateOptioner opts = append(opts, mongo.Opt.Upsert(true)) filter := bson.NewDocument(bson.EC.String("name", name)) update := bson.NewDocument( bson.EC.SubDocumentFromElements("$inc", bson.EC.Int64("qty", count)), bson.EC.SubDocumentFromElements("$set", bson.EC.String("name", name))) _, err := coll.UpdateOne(context.Background(), filter, update, opts...) check(err) } }。

var togglemenu = (function () {
    var togSubtopics = document.getElementById("subtopics");

    togSubtopics.addEventListener("click", function () {
        togSubtopics.classList.toggle("show");
    });

    return {
        togglemenu: togglemenu()
    };
})();

}

更新

其他帖子并未完全解决这个问题。以下是我提出的解决此问题的代码段。我在这里发布它的目的是帮助那些遇到完全相同问题的人：

body {
    margin: 0;
}

li, a{
    text-decoration: none;
    list-style-type: none;
    text-decoration-line: none;
    color: black;
}

/*main-menu*/
#mainmenu {
    position: relative;
}

#mainmenu ul {
    margin: 0;
    padding: 0;
}

#mainmenu li {
    display: inline-block;
}

#mainmenu a {
    display: block;
    width: 100px;
    padding: 10px;
    border: 1px solid;
    text-align: center;
}

/*subtopics*/
#subtopics {
    position: absolute;
    display: none;
    margin-top: 10px;
    width: 100%;
    left: 0;
}

.show {
    display: block;
}

#subtopics ul {
    margin: 0;
    padding: 0;
}

#subtopics li {
    display: block;
}

#subTopics a {
    text-align: left;
}

/*columns*/
#column1, #column2, #column3 {
    position: relative;
    float: left;
    left: 125px;
    margin: 0px 5px 0px 0px;
}

/*hover underline*/
#mainmenu li:hover {
    text-decoration: underline;
}

使用MongoDB mongo go驱动程序进行计数器持久收集

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