Error parsing custom _id type in go mongodb project

I'm building a go project using mongodb as a database.

In order to make the code easily maintainable, i created a mongo provider package that is the single point of contact between my project and mongo-driver/mongo. That way I only use my own implementations in the rest of the project.

I wrapped the whole native driver with my own implementations. The only problem I encounter is with the primitive.ObjectID type.

Obviously, my structures are stored in an internal models package like this :

type StoredUser struct {
     Id       my_mongo_driver.Id `bson:"_id,omitempty"`
     Username string             `bson:"username"`
}

As you see, the models package does not have any contact with the native mongo-driver/mongo package. This is what I want.

In the my_mongo_driver package, I tried reimplementing the Id type by two different ways :

• type Id primitive.ObjectID
• type Id struct {primitive.ObjectID}

In both cases, I get an error when parsing the database results :

• First approach : error decoding key _id: cannot decode objectID into an array
• Second approach : error decoding key _id: cannot decode objectID into a my_mongo_driver.Id

How can I properly isolate my packages if my models need to use the exact native type for the parsing to work ?