In mongodb-go-driver, how to marshal/unmarshal BSON in to a struct

Question

I am new to mongodb-go-driver. But i am stuck.

cursor, e := collection.Find(context.Background(), bson.NewDocument(bson.EC.String(\"name\", id)))

for cursor.Nex         


        

Answer 1

The official MongoDB driver uses the objectid.ObjectID type for MongoDB ObjectIds. This type is:

type ObjectID [12]byte

So you need to change your struct to:

type Language struct {
    ID         objectid.ObjectID   `json:"id" bson:"_id"`             
    Name       string   `json:"name" bson:"name"`
    Vowels     []string `json:"vowels" bson:"vowels"`
    Consonants []string `json:"consonants" bson:"consonants"`
}

I had success with:

m := make(map[string]Language)
cursor, e := collection.Find(context.Background(), bson.NewDocument(bson.EC.String("name", id)))

for cursor.Next(context.Background()) {

    l := Language{}
    err := cursor.Decode(&l)
    if err != nil {
        //handle err
    }
    m[id] = l // you need to handle this in a for loop or something... I'm assuming there is only one result per id
}