make models only train one at the time closes #48

logic/tasks/utils/utils.go

@@ -16,6 +16,7 @@ type Task struct {
 	UserConfirmed int       `db:"user_confirmed" json:"user_confirmed"`
 	Compacted     int       `db:"compacted" json:"compacted"`
 	TaskType      int       `db:"task_type" json:"type"`
+	ExtraTaskInfo string    `db:"extra_task_info" json:"extra_task_info"`
 	Result        string    `db:"result" json:"result"`
 	CreatedOn     time.Time `db:"created_on" json:"created"`
 }
@@ -35,7 +36,8 @@ const (
 type TaskType int
 
 const (
-	TASK_TYPE_CLASSIFICATION TaskType = 1
+	TASK_TYPE_CLASSIFICATION TaskType = 1 + iota
+	TASK_TYPE_TRAINING
 )
 
 func (t Task) UpdateStatus(base BasePack, status TaskStatus, message string) (err error) {