Explicitly add a PK constraint for the many2many association of task-labels (#227)

Author: dkhalife

apiserver/internal/models/task.go

@@ -30,8 +30,8 @@ type TaskHistory struct {
 }
 
 type TaskLabel struct {
-	TaskID  int `json:"task_id"`
-	LabelID int `json:"label_id"`
+	TaskID  int `json:"task_id" gorm:"primaryKey"`
+	LabelID int `json:"label_id" gorm:"primaryKey"`
 }
 
 type CreateTaskReq struct {

apiserver/internal/utils/migration/migration.go

@@ -12,6 +12,7 @@ func Migration(db *gorm.DB) error {
 		models.AppToken{},
 		models.Label{},
 		models.Task{},
+		models.TaskLabel{},
 		models.TaskHistory{},
 		models.NotificationSettings{},
 		models.Notification{},