golang mgo marshalling bson

Question

I have a structure like this:

type data_to_store struct {
    Data     some_custom_structure       `json:"Data" bson:"Data"`
    MoreData   another_custom_structure   `json:"more_data" bson:"More_Data"`
}

creating an object that uses this struct:

Data := data_to_store {
    Data:     some_custom_struct_object,
    MoreData:   another_custom_struct_object,
}

And I'm trying to insert it into db like that:

session, _ := mgo.Dial("localhost")
defer session.Close()
session.SetMode(mgo.Monotonic, true)
collection := session.DB("test_database").C("test_collection")
collection.Insert(&Data)

And it does store, but it turns out to be inserted like this:

{ "lol": "rofl",
  "lmao": "kek",
  }
} { "blah": "blahblah",
  "ololo": 2,
}

Is there a way to make it be stored like the following?

"data": { "lol": "rofl",
  "lmao": "kek",
  }
}, "more_data" { "blah": "blahblah",
  "ololo": 2,
}

Marshalling data doesn't help in this endeavour, or I'm doing it wrong:

data, _ := bson.Marshal(&replay)
collection.Insert(&data)

Answer 1

If this below is the Json structure that you want to store in Mongo:

{
"data": [{
        "lol": "rofl"
    },
    {
        "lmao": "kek"
    }
],
"more_data": [{
        "blah": "blahblah"
    },
    {
        "ololo": 2
        }
    ]}

You need these type of Go struct:

type Data struct {
    Key  string `json:"key,omitempty"`
    Value string `json:"value,omitempty"`
}

type DataToStore struct {
   Data []Data `json:"data"`
   MoreData []Data  `json:"more_data"`
}

You can use this online tool to convert json into go struct.