fetching the data from a mongodb in golang

Question

I'm trying to fetch data from mongodb in golang using the gopkg.in/mgo.v2 driver, the format of the data is not fixed , as in few rows will be containing some fields which other rows might not.

here is the code for the same

session, err := mgo.Dial("mongodb://root:root@localhost:27017/admin")
db := session.DB("test")
fmt.Println(reflect.TypeOf(db))
CheckError(err,"errpor")
result := make(map[string]string)
//query := make(map[string]string)
//query["_id"] = "3434"

err1 := db.C("mycollection").Find(nil).One(&result)
CheckError(err1,"error")
for k := range result {
    fmt.Println(k)
}

Now the data contained in the collection is { "_id" : "3434", "0" : 1 }, however the for loop gives the output as _id , shouldn't there be two keys '_id' and '0' ? or am I doing something wrong here.

Answer 1

oh I found the solution the "result" variable should be of type bson.M and then you can typecast accordingly as you go deep into the nesting structure.