MongoDb:如何将附加对象插入到golang中的对象集合中? [英] MongoDb : How to insert additional object into object collection in golang?
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问题描述
{
_id:ObjectId(51c9cf2b206dfb73d666ae07),
firstName:john,
lastName:smith,
ownerEmail:john.smith@gmail。
营地:[
{
name:cubs-killeen,
location:killeen
},
{
name:cubs-temple,
location:temple
}
],
教师:[
{
firstName:joe,
lastName:black
},
{
firstName:will,
lastName:smith
}
]
}
并将对象推入上面的文件中需要做
db。 stack.update({ownerEmail:john.smith@gmail.com},
{$ push:{
camps:{name:cubs-killeen,location :其他地方}
}
}
)
<那么如何使用 mgo驱动程序来实现相同的功能? 尝试以下操作:
session,err:= mgo.Dial(127.0.0.1)
if err!= nil {
恐慌(错误)
}
推迟session.Close()
session.SetMode(mgo.Monotonic,true)
// Drop Database
ifDrop {
err = session.DB(test)。DropDatabase()
if err!= nil {
panic(err)
)
//收集堆栈
c:= session.DB(test)。C(stack)
//查询
查询:= bson.M {ownerEmail:john.smith@gmail.com}
更新:= bson.M {$ push:bson.M {camps: bson.M {name:cubs-k 更新
err = c.Update(查询,更新)
if err!= nil {
恐慌(错误)
}
I want just push object into array of objects in mongodb
{
"_id" : ObjectId("51c9cf2b206dfb73d666ae07"),
"firstName" : "john",
"lastName" : "smith",
"ownerEmail" : "john.smith@gmail.com",
"camps" : [
{
"name" : "cubs-killeen",
"location" : "killeen"
},
{
"name" : "cubs-temple",
"location" : "temple"
}
],
"instructors" : [
{
"firstName" : "joe",
"lastName" : "black"
},
{
"firstName" : "will",
"lastName" : "smith"
}
]
}
and to push object into above document in need to do
db.stack.update({"ownerEmail":"john.smith@gmail.com"},
{$push: {
"camps":{ "name":"cubs-killeen","location":"some other Place" }
}
}
)
So how can i implement same functionality using mgo driver
解决方案
Try the following:
session, err := mgo.Dial("127.0.0.1")
if err != nil {
panic(err)
}
defer session.Close()
session.SetMode(mgo.Monotonic, true)
// Drop Database
if IsDrop {
err = session.DB("test").DropDatabase()
if err != nil {
panic(err)
}
}
// Collection Stack
c := session.DB("test").C("stack")
// Query
query := bson.M{"ownerEmail": "john.smith@gmail.com"}
update := bson.M{"$push": bson.M{"camps": bson.M{"name": "cubs-killeen", "location": "some other Place"}}}
// Update
err = c.Update(query, update)
if err != nil {
panic(err)
}
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