How to construct and pass bson document - Go lang?

Question

I am using Go and mongoDB in my project and mgo is to connect to connect MongoDB.

I am having following document this is to be inserted in the MongoDB

Answer 1

You don't need to generate a BSON document yourself.
Let say in account.go you will have an account struct:

type Account struct {
  Id bson.ObjectId `bson:"_id"` // import "labix.org/v2/mgo/bson"
  BalanceAmount int
  // Other field
}

Then in dbEngine.go your Insert function:

func Insert(document interface{}){
  session, err := mgo.Dial("localhost")
  // check error
  c := session.DB("db_name").C("collection_name")
  err := c.Insert(document)
}

And then, some where in your app:

acc := Account{}
acc.Id = bson.NewObjectId()
acc.BalanceAmount = 3

dbEngine.Insert(&acc);

Answer 2

The mgo driver uses the labix.org/v2/mgo/bson package to handle BSON encoding/decoding. For the most part, this package is modelled after the standard library encoding/json package.

So you can use structs and arrays to represent objects. For example,

type Document struct {
    Id bson.ObjectId `bson:"_id"`
    BalanceAmount int `bson:"balanceamount"`
    Type string `bson:"type"`
    Authentication Authentication `bson:"authentication"`
    Stamps Stamps `bson:"stamps"`
}
type Authentication struct {
    ...
}
type Stamps struct {
    ...
}

You can now create values of this type to pass to mgo.