I have an interface, let's say:

 
type ITest interface {
    Hello()
}
 
Struct, which implements this:

type STest struct {
    Greeting string
}

func (s *STest) Hello() {
    fmt.Println(s.Greeting)
}
And an array of ITest interfaces with a STest struct as first element:
 
var iArr []ITest
iArr = append(iArr, &STest{"heelloo"})
 
When i'm trying to create an update document for UpdateOne method, i do the following:
 
bson.D{{"$set", bson.D{{"somefield", iArr}}}}
 
and getting an error:
 
cannot transform type primitive.D to a BSON Document: no encoder found for models.ITest
 
But for the separate element it works like a charm (no error, present in db):
 
bson.D{{"$set", bson.D{{"somefield", iArr[0]}}}}
 
 
So is it bug or something?

PS: i'm using v1.0.0-rc1+prerelease version