Add resetter interface

mongox/common.go

@@ -19,6 +19,11 @@ type Loader interface {
 	Load(db *Database, filters ...interface{}) error
 }
 
+// Resetter is an interface for documenta that can be resetted
+type Resetter interface {
+	Reset()
+}
+
 // BaseObjectID is an interface for documents that have objectId type for the _id field
 type BaseObjectID interface {
 	GetID() primitive.ObjectID

mongox/common/loadmany.go

@@ -25,6 +25,11 @@ func (l *ManyLoader) Get() error {
 		return errors.NotFoundErrorf("%s", mongo.ErrNoDocuments)
 	}
 
+	resettable, canReset := l.target.(mongox.Resetter)
+	if canReset {
+		resettable.Reset()
+	}
+
 	err := l.Decode(l.target)
 	if err != nil {
 		return errors.InternalErrorf("can't decode desult: %s", err)