share ticket and ticket message

apps/attachments/models.py

@@ -8,6 +8,10 @@ def attachment_path(instance,filename):
     return f"tickets/{t.created_at:%Y/%m}/{t.public_id}/{m.public_id}/{uuid.uuid4().hex}{ext}"
 class AttachmentPolicy(models.Model):
     attachment_type=models.CharField(max_length=20,unique=True); is_enabled=models.BooleanField(default=True); max_file_size=models.PositiveBigIntegerField(); max_files_per_message=models.PositiveSmallIntegerField(default=10); allowed_extensions=models.JSONField(default=list); allowed_mime_types=models.JSONField(default=list); sort_order=models.PositiveIntegerField(default=0); updated_at=models.DateTimeField(auto_now=True)
+
+    def __str__(self):
+        return self.attachment_type
+
 class Attachment(PublicIdModel,models.Model):
     class Type(models.TextChoices): IMAGE="IMAGE","تصویر"; VIDEO="VIDEO","ویدئو"; VOICE="VOICE","صدا"; PDF="PDF","PDF"; WORD="WORD","Word"; EXCEL="EXCEL","Excel"; ZIP="ZIP","ZIP"; RAR="RAR","RAR"; OTHER="OTHER","سایر"
     message=models.ForeignKey("messaging.Message",on_delete=models.PROTECT,related_name="attachments"); file=models.FileField(upload_to=attachment_path,max_length=500); original_name=models.CharField(max_length=255); stored_name=models.CharField(max_length=255); relative_path=models.CharField(max_length=500); attachment_type=models.CharField(max_length=20,choices=Type.choices); mime_type=models.CharField(max_length=150); extension=models.CharField(max_length=20); file_size=models.PositiveBigIntegerField(); uploaded_by=models.ForeignKey(settings.AUTH_USER_MODEL,on_delete=models.PROTECT); created_at=models.DateTimeField(auto_now_add=True)