attachments upload

be/app/Http/Resources/SubTaskResource.php

@@ -20,7 +20,7 @@ class SubTaskResource extends JsonResource
             'project_code' => $this->mastertask->project->code,
             'master_task_id' => $this->mastertask->id,
             'master_task' => $this->mastertask->title,
-            'team_id' => $this->mastertask->team->id,
+            'team_id' => ($this->mastertask->team) ? $this->mastertask->team->id : null,
             'team' => $this->mastertask->team,
             'employee_id' => $this->user->id,
             'duration' => $this->estimated_time,
@@ -28,6 +28,7 @@ class SubTaskResource extends JsonResource
             'is_finished' => $this->is_finished,
             'timeblocks' => TimeblockResource::collection($this->timeblocks),
             'timesheets' => TimesheetResource::collection($this->timesheets),
+            'files' => AttachmentResource::collection($this->attachments),
         ];
 
     }