douyaosi3164
2018-10-12 10:39
浏览 241

如何在mongo-go-driver中添加选项`writeConcern`?

I do not understand how to add recording parameters for MongoDB using mongo-go-driver

Example request

c.client.Database(MONGO_DATABASE).Collection(*packet.ID).InsertMany(nil, packet.Item, opt)

How to specify the necessary parameters in opt?

图片转代码服务由CSDN问答提供 功能建议

我不明白如何使用 mongo-go-driver

示例请求

 < 代码> c.client.Database(MONGO_DATABASE).Collection(* packet.ID).InsertMany(nil,packet.Item,opt)
   
 
 

如何指定 opt 中的必要参数?

  • 写回答
  • 好问题 提建议
  • 追加酬金
  • 关注问题
  • 收藏
  • 邀请回答

1条回答 默认 最新

  • dsc7188 2018-10-16 07:15
    已采纳

    VERSION 1.0

    In MongoDB Go driver production release you can set writeConcern as below:

    import (    
        "go.mongodb.org/mongo-driver/mongo/options"     
        "go.mongodb.org/mongo-driver/bson"  
        "go.mongodb.org/mongo-driver/mongo"     
        "go.mongodb.org/mongo-driver/mongo/writeconcern" 
    )
    
    mongoURI := "mongodb://server:port/"
    opts := options.Client().ApplyURI(mongoURI).SetWriteConcern(writeconcern.New(writeconcern.WMajority()))
    
    client, err := mongo.NewClient(opts)
    if err != nil {
        panic(err)
    }
    ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
    defer cancel()
    err = client.Connect(ctx)
    if err != nil {
        panic(err)
    }
    
    collection := client.Database("database").Collection("collection")
    

    See also:

    VERSION 0.0.16

    Using mongo-go-driver, you can set a write concern option as below example:

    import(
      "github.com/mongodb/mongo-go-driver/bson"
      "github.com/mongodb/mongo-go-driver/core/writeconcern"
      "github.com/mongodb/mongo-go-driver/mongo"
      "github.com/mongodb/mongo-go-driver/mongo/collectionopt"
    )
    
    // Example document 
    document := bson.VC.DocumentFromElements(
                     bson.EC.SubDocumentFromElements(
                       "foo",
                       bson.EC.Int32("bar", 101),
                     ),
                   )
    
    // Set majority write concern
    wMajority := writeconcern.New(writeconcern.WMajority())
    
    database := client.Database("database")
    collection := database.Collection("collection", collectionopt.WriteConcern(wMajority))
    
    _, err = collection.InsertOne(context.Background(), document)
    

    Can also use W(int) to specify an arbitrary number of mongod instances. See more writeconcern/writeconcern.go

    评论
    解决 无用
    打赏 举报

相关推荐 更多相似问题