如何使用struct使用Golang查询MongoDB

如何解决如何使用struct使用Golang查询MongoDB

我在使用golang查询mongoDB时遇到问题。

基本上，我只想返回[] Post类型的文档的结果。

这是我的代码

package main

import (
    "context"
    "log"
    "time"
  "fmt"
    "go.mongodb.org/mongo-driver/bson"
    "go.mongodb.org/mongo-driver/mongo"
    "go.mongodb.org/mongo-driver/mongo/options"
)

type SecretsStruct struct {
    UserID string `bson:"userid" json:"userid"`
    SecretOne string `bson:"secret_one" json:secret_one`
    SecretTwo string `bson:"secret_two" json:secret_two`
    SecretThree string `bson:"secret_three" json:secret_three`
}
type Post struct {
    //ID        primitive.ObjectID `bson:"_id"`
    Title     string             `bson:"title"`
    Body      string             `bson:"body"`
    Tags      []string           `bson:"tags"`
    Comments  uint64             `bson:"comments"`
    CreatedAt time.Time          `bson:"created_at"`
    UpdatedAt time.Time          `bson:"updated_at"`
}

func main() {
        //Connect to the mongodb
    client,err := mongo.NewClient(options.Client().ApplyURI("mongodb://localhost:27017"))
    if err != nil {
        log.Fatal(err)
    }
    ctx,_ := context.WithTimeout(context.Background(),10*time.Second)
    err = client.Connect(ctx)
    if err != nil {
        log.Fatal(err)
    }
    defer client.Disconnect(ctx)

        //Determine a database & collection to search in
    quickstartDatabase := client.Database("quickstart")
    podcastsCollection := quickstartDatabase.Collection("podcasts")
    //episodesCollection := quickstartDatabase.Collection("episodes")


    cursor,err := podcastsCollection.Find(ctx,bson.M{})
    if err != nil {
        log.Fatal(err)
    }
    var podcasts []Post
    if err = cursor.All(ctx,&podcasts); err != nil {
        log.Fatal(err)
    }
    fmt.Println(podcasts)
    //fmt.Println(cursor)
}

现在，即使没有将它们作为[] Post对象插入，它也会输出我的所有文档。

这是当前的输出：

[{Company Name  [] 0 0001-01-01 00:00:00 +0000 UTC 0001-01-01 00:00:00 +0000 UTC} 
{Company Name   [] 0 0001-01-01 00:00:00 +0000 UTC 0001-01-01 00:00:00 +0000 UTC} 
{My name is Thomas Hello world [] 0 0001-01-01 00:00:00 +0000 UTC 0001-01-01 00:00:00 +0000 UTC} 
{My name is Thomas Hello world [] 0 0001-01-01 00:00:00 +0000 UTC 0001-01-01 00:00:00 +0000 UTC} 
{Company Name  [] 0 0001-01-01 00:00:00 +0000 UTC 0001-01-01 00:00:00 +0000 UTC}]

我希望它是以下名称，因为我的名字是Thomas Hello world不是[] Post类型：

[{Company Name  [] 0 0001-01-01 00:00:00 +0000 UTC 0001-01-01 00:00:00 +0000 UTC} 
{Company Name   [] 0 0001-01-01 00:00:00 +0000 UTC 0001-01-01 00:00:00 +0000 UTC} 
{Company Name  [] 0 0001-01-01 00:00:00 +0000 UTC 0001-01-01 00:00:00 +0000 UTC}]

编辑：

这是mongoDB中数据的样子：

{ "_id" : ObjectId("5f319c9cb384c96b57e13c16"),"title" : "Company Name","author" : "Thomas" }
{ "_id" : ObjectId("5f319d55ad16c576b7227aa3"),"author" : "Thomas" }
{ "_id" : ObjectId("000000000000000000000000"),"title" : "My name is Thomas","body" : "Hello world","tags" : null,"comments" : NumberLong(0),"created_at" : ISODate("0001-01-01T00:00:00Z"),"updated_at" : ISODate("0001-01-01T00:00:00Z") }
{ "_id" : ObjectId("5f348c0df4736ca6b473984d"),"updated_at" : ISODate("0001-01-01T00:00:00Z") }
{ "_id" : ObjectId("5f348dfe125ef44c3c9ad664"),"author" : "Thomas" }