如何在Mgo的Mongodb中更新子文档数组字段以及其他一些字段？

问题描述：

Can we update sub-document array fields along with other document fields in Mgo? If so, please help me with my query.

 c := db.C("user")
 colQuerier := bson.M{"email": *olduname}
 change := bson.M{"$set":bson.M{"password":*pwd, "place":*place, "emails.$.received":*received,"emails.$.sent":*sent}}
        err := c.Update(colQuerier, change)

My Database Structs are as follows:

type Emails struct{
    Id          bson.ObjectId `bson:"_id,omitempty"`
    Received string
    Sent    string  
}

type User   struct {
    Id          bson.ObjectId `bson:"_id,omitempty"`
    Email       string
    Password    string
    Place       string
    Emails     

}

I am getting a run time error saying: The positional operator did not find the match needed from the query. Unexpanded update: emails.$.received

我们可以更新子文档数组字段以及Mgo中的其他文档字段吗？如果可以，请帮助我我的查询。 p>

  c：= db.C（“ user”）
 colQuerier：= bson.M {“ email”：* olduname} 
 change：= bson  .M {“ $ set”：bson.M {“ password”：* pwd，“ place”：* place，“ emails。$。received”：* received，“ emails。$。sent”：* sent}} \ 错误：= c.Update（colQuerier，change）
  code>  pre> 
 
 我的数据库结构如下： p> 
 
 
  类型电子邮件struct {
 Id bson.ObjectId`bson：“ _ id，omitempty”`
收到的字符串
发送字符串
} 
 
type用户结构{
 Id bson.ObjectId`bson：“ _ id，omitempty  “`
电子邮件字符串
密码字符串
放置字符串
电子邮件
 
} 
  code>  pre> 
 
 我遇到了运行时错误，说： 运算符未从查询中找到所需的匹配项。 未扩展的更新：已收到电子邮件。$。 p> 
  div>

答

It should be emails.received as received is not an array, so you don't need the positional operator $:

c := db.C("user")
colQuerier := bson.M{"email": *olduname}
change := bson.M{"$set":bson.M{"password":*pwd, "place":*place, "emails.received":*received}}
err := c.Update(colQuerier, change)

如何在Mgo的Mongodb中更新子文档数组字段以及其他一些字段？

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