query by date in mongodb - mongodb

Question

I'm able to insert an entry into MongoDB using the golang driver gopkg.in/mgo.vs and gopkg.in/mgo.vs/bson but I'm not able to pull it out. In the mongo shell, if I do
db.Items.find({ date : 1428762411980 })
it shows me the entry that I just inserted with the Go code. However, if I try to do the following to fetch it in Go, it's telling me that the record isn't found
func fetch(w http.ResponseWriter, r *http.Request){
var result SomeStruct
date := r.FormValue("date")
err := Items.Find(bson.M{"date":date}).One(&result)
...code omitted...
}
func Items() *mgo.Collection {
return DB().C("Items")
}
func DB() *mgo.Database {
return DBSession().DB("mydb")
}
One thing I noticed was that, in the shell, the date is stored as a NumberLong
"date" : NumberLong("1428762411980")
I'm wondering if I have to do something with the date value that I receive from the form in the fetch function before using it to query the database?
Update
Before saving the data to the db, it comes in as a json string like this
"date":1428762411980
I then decode it into a struct
type blah struct{
Id bson.ObjectId `json:"id" bson:"_id"`
Date int64 `json:"date" bson: "date"`
And it gets saved like this (as shown in the shell)
"date" : NumberLong("1428762411980")

Answer 1

r.FormValue returns a string, but you need an int64. Use strconv.ParseInt. Then your query should work.
date, err := strconv.ParseInt(r.FormValue("date"), 10, 64)
// handle err
err = Items.Find(bson.M{"date":date}).One(&result)