Mgo and golang question.
I run into problem again. I try to update record in the database, but running simple command visitors.UpdateId(v.Id, bson.M{"$set": zscore});
where zscore
is a variable of type Zscore
, does not work. However if I manually convert zscore
to bson.M
structure, everything works fine.
Does anybody know how to update the record in mongodb using mgo, without manually dumping structure values into bson.M?
Example:
type Zscore struct {
a float64 `bson:"a,omitempty" json:"a"`
b float64 `bson:"b,omitempty" json:"b"`
c float64 `bson:"c,omitempty" json:"c"`
}
v := Visitor{}
zscore := Zscore{}
visitors := updater.C("visitors")
for result.Next(&v) {
zscore.a = 1
zscore.b = 2
zscore.c = 0
//does not work
if err := visitors.UpdateId(v.Id, bson.M{"$set": zscore}); err != nil {
log.Printf("Got error while updating visitor: %v
", err)
}
//works
set := bson.M{
"zscore.a": zscore.a,
"zscore.b": zscore.b,
"zscore.c": zscore.c,
}
if err := visitors.UpdateId(v.Id, bson.M{"$set": set}); err != nil {
log.Printf("Got error while updating visitor: %v
", err)
}
}