如何将mongodb数据解码为struct

Question

转到模型：

package models

import (
    "time"
    "go.mongodb.org/mongo-driver/bson/primitive"
)

// News : News Model
type News struct {
    ID         primitive.ObjectID `json:"_id,omitempty" bson:"_id,omitempty"`
    Host       string             `json:"host,omitempty" bson:"host,omitempty"`
    Category   string             `json:"category,omitempty" bson:"category,omitempty"`
    Headline   string             `json:"headline,omitempty" bson:"headline,omitempty"`
    Image      string             `json:"image,omitempty" bson:"image,omitempty"`
    URL        string             `json:"url,omitempty" bson:"url,omitempty"`
    Date       string             `json:"date,omitempty" bson:"date,omitempty"`
    ClickCount int64              `json:"clickCount,omitempty" bson:"clickCount,omitempty"`
    Archived   bool               `json:"archived,omitempty" bson:"archived,omitempty"`
    CreatedAt  time.Time          `json:"createdAt,omitempty" bson:"createdAt,omitempty"`
}

我拥有的MongoDB数据：

{
    "_id" : ObjectId("5e1d58f6fad87c735bbca592"),
    "createdAt" : ISODate("2020-01-14T11:30:22.481Z"),
    "clickCount" : 0,
    "archived" : false,
    "host" : "timesofindia",
    "category" : "sports",
    "headline" : "Caroline Wozniacki pulls out of Kooyong Classic",
    "url" : "https://timesofindia.indiatimes.com/sports/tennis/top-stories/caroline-wozniacki-pulls-out-of-kooyong-classic/articleshow/73238147.cms",
    "image" : "https://timesofindia.indiatimes.com/thumb/msid-73238147,width-400,resizemode-4/73238147.jpg",
    "date" : "14 Jan 2020, 0958 hrs IST"
}

我的API端点代码：

func AllNews(w http.ResponseWriter, r *http.Request) {
    w.Header().Set("content-type", "application/json")

    collection := config.Client.Database("newspaper").Collection("news")
    ctx, _ := context.WithTimeout(context.Background(), 5*time.Second)

    var allNews []models.News
    var finalResponse models.FinalResponse

    cursor, e := collection.Find(ctx, bson.M{})
    if e != nil {
        w.WriteHeader(http.StatusInternalServerError)
        w.Write([]byte(`{ "message": "` + e.Error() + `" }`))
        return
    }
    defer cursor.Close(ctx)

    for cursor.Next(ctx) {
        var news models.News
        cursor.Decode(&news)
        allNews = append(allNews, news)
    }

    finalResponse.Status = "success"
    finalResponse.Body = allNews

    json.NewEncoder(w).Encode(finalResponse)
}

我现在面临的挑战正在输出中，我看不到“ clickCount”和“ archived”。

输出：

{
    "status": "success",
    "body": [
        {
            "_id": "5e1d58f6fad87c735bbca588",
            "host": "timesofindia",
            "category": "business",
            "headline": "Bandhan Bank all set to announce its Q3 results today",
            "image": "https://timesofindia.indiatimes.com/thumb/msid-73239715,width-400,resizemode-4/73239715.jpg",
            "url": "https://timesofindia.indiatimes.com/business/india-business/bandhan-bank-all-set-to-announce-its-q3-results-today/articleshow/73239715.cms",
            "date": "14 Jan 2020, 1111 hrs IST",
            "createdAt": "2020-01-14T11:30:22.442Z"
        }
    ]
}

我尝试在两个字段上将数据类型更改为int32和string，但仍然无法正常工作。如果我更改这两个字段的数据类型，那么在输出的“ body”中，我只会看到“ id”和“ createdAt”让我知道是否需要更多数据。

Answer 1

您应该删除clickCount和archived JSON标签不正确