英文:
Inserting ISODate field using mgo error
问题
我真的很新使用go、mgo和gin gonic...我正在创建一个小应用程序，但在使用mgo将新记录插入到mongoDB时遇到了问题。我的错误信息如下：
> "PANIC: 解析字段documents的第0个元素时出错 :: caused by :: '0'字段的类型错误，期望是对象，但找到的是0: [ { date: new Date(1441051152939), from: "11", to: "12", office: "2", client_id: "1368465545" } ]_"
我的结构体如下：
type Reservation struct {
ID bson.ObjectId `bson:"_id,omitempty" json:"_id"`
Date time.Time `bson:"date" json:"date"`
From string `bson:"from" json:"from"`
To string `json:"to"`
Office string `json:"office"`
Client_id string `json:"client_id"}`
我尝试使用gin-gonic和mgo进行插入操作，代码如下：
func addReservation(c *gin.Context) {
x := session.DB("projXXXX").C("reservation")
var reservations []Reservation
c.Bind(&reservations)
err := x.Insert(&reservations)
if err != nil {
panic(err)
}
c.String(200,"whatever")
}
我的mongoDB集合如下：
{
"_id" : ObjectId("55ba2e611cb87b9a6d75e94b"),
"date" : ISODate("2015-10-22T00:00:00.000Z"),
"from" : "9",
"to" : "10",
"office" : "4",
"client_id" : "1123456469797"
}
非常感谢你的帮助。
英文:
I'm really new in using go, mgo and gin gonic ...I've been creating a mini app and I have a problem inserting a new register into mongoDB using mgo. My error says:
> "PANIC: error parsing element 0 of field documents :: caused by ::
> wrong type for '0' field, expected object, found 0: [ { date: new
> Date(1441051152939), from: "11", to: "12", office: "2", client_id:
> "1368465545" } ]_"
My struct is the next one:
type Reservation struct {
ID bson.ObjectId `bson:"_id,omitempty" json:"_id"`
Date time.Time `bson:"date" json:"date"`
From string `bson:"from" json:"from"`
To string `json:"to"`
Office string `json:"office"`
Client_id string `json:"client_id"` }
And I'm trying to insert it as follows using gin-gonic and mgo:
func addReservation(c *gin.Context) {
x := session.DB("projXXXX").C("reservation")
var reservations []Reservation
c.Bind(&reservations)>
err := x.Insert(&reservations)
if err != nil {
panic(err)
}
c.String(200,"whatever")
}
My collection in mongoDB is like this:
{
"_id" : ObjectId("55ba2e611cb87b9a6d75e94b"),
"date" : ISODate("2015-10-22T00:00:00.000Z"),
"from" : "9",
"to" : "10",
"office" : "4",
"client_id" : "1123456469797"
}
Thanks a lot for your help
答案1
得分: 4
从错误的表现来看，MongoDB在期望看到一个单个对象的位置上看到了一个数组。看起来问题是你试图将[]Reservation切片作为单个对象插入。
而不是将对象切片作为插入的参数，Collection.Insert函数将每个要插入的对象作为单独的参数传入。你可能想要使用特殊的...语法来调用可变参数函数：
err := x.Insert(reservations...)
英文:
From the look of the error, MongoDB is seeing an array where it expects to see a single object. It looks like the problem is that you're trying to insert the []Reservation slice as a single object.
Rather than taking a slice of objects to insert, Collection.Insert takes each object to insert as a separate argument. You probably want to use the special ... syntax for calling a variadic function:
err := x.Insert(reservations...)
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