英文:
How to update a sub-document array fields along with some other fields in Mongodb, Mgo?
问题
我们可以在Mgo中更新子文档数组字段以及其他文档字段吗？如果可以的话，请帮我解决我的查询问题。
c := db.C("user")
colQuerier := bson.M{"email": *olduname}
change := bson.M{"$set": bson.M{"password": *pwd, "place": *place, "emails.$.received": *received, "emails.$.sent": *sent}}
err := c.Update(colQuerier, change)
我的数据库结构如下：
type Emails struct {
Id bson.ObjectId `bson:"_id,omitempty"`
Received string
Sent string
}
type User struct {
Id bson.ObjectId `bson:"_id,omitempty"`
Email string
Password string
Place string
Emails []Emails
}
我得到了一个运行时错误，错误信息是：定位操作符在查询中找不到所需的匹配项。未展开的更新：emails.$.received
英文:
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
答案1
得分: 2
应该将emails.received作为received不是一个数组，所以你不需要使用位置操作符$：
c := db.C("user")
colQuerier := bson.M{"email": *olduname}
change := bson.M{"$set": bson.M{"password": *pwd, "place": *place, "emails.received": *received}}
err := c.Update(colQuerier, change)
英文:
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)
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