ObjectId base might be empty

mongox/base/objectid.go

@@ -1,12 +1,15 @@
 package base
 
 import (
+	"github.com/mainnika/mongox-go-driver/mongox"
 	"github.com/mongodb/mongo-go-driver/bson/primitive"
 )
 
+var _ mongox.BaseObjectID = &ObjectID{}
+
 // ObjectID is a structure with objectId as an _id field
 type ObjectID struct {
-	ID primitive.ObjectID `bson:"_id" json:"_id"`
+	ID primitive.ObjectID `bson:"_id,omitempty" json:"_id,omitempty"`
 }
 
 // GetID returns an _id

mongox/common.go

@@ -1,5 +1,9 @@
 package mongox
 
+import (
+	"github.com/mongodb/mongo-go-driver/bson/primitive"
+)
+
 type Saver interface {
 	Save(db *Database) error
 }
@@ -11,3 +15,8 @@ type Deleter interface {
 type Loader interface {
 	Load(db *Database, filters ...interface{}) error
 }
+
+type BaseObjectID interface {
+	GetID() primitive.ObjectID
+	SetID(id primitive.ObjectID)
+}