Aggregate return empty

[uslualper]

I want to do what you see using the mgm library, but I couldn't figure it out.

[{
    '$unwind': {
        'path': '$nodes', 
        'includeArrayIndex': 'arrayIndex', 
        'preserveNullAndEmptyArrays': True
    }
}, {
    '$lookup': {
        'from': 'documents', 
        'localField': 'nodes.data.video', 
        'foreignField': '_id', 
        'as': 'results'
    }
}, {
    '$match': {
        '_id': ObjectId('6560f9e87c9e42e241e29c62')
    }
}]

func (w *Widget) Get(id string) (interface{}, error) {
widget := &mongodb.Widget{}
documentCollName := mgm.Coll(&mongodb.Document{}).Name()

if cur, err := mgm.Coll(widget).Aggregate(mgm.Ctx(), bson.A{
    bson.M{operator.Match: bson.M{field.ID: id}},// If I add this, no result is returned
    builder.S(builder.Unwind("$nodes", "arrayIndex", true)),
    builder.S(builder.Lookup(documentCollName, "nodes.data.video", "_id", "documents")),
}); err == nil {
    results := []bson.M{}
    cur.All(mgm.Ctx(), &results)
    return results, nil
} else {
    fmt.Println(err)
}

return widget, nil }