update serilaizer of ticket and message

backend/ticket/serializers.py

@@ -21,6 +21,16 @@ class AttachmentSerializer(serializers.ModelSerializer):
         return obj.file.url
 
 class MessageSerializer(serializers.ModelSerializer):
+    is_user = serializers.SerializerMethodField(read_only=True)
+    class Meta:
+        model = Message
+        exclude = ('sender', )
+        extra_kwargs = {'ticket': {'write_only': True}}
+    def get_is_user(self, obj):
+        user = self.context['request'].user
+        return user == obj.sender
+
+class MessageAttachmentSerializer(serializers.ModelSerializer):
     is_user = serializers.SerializerMethodField(read_only=True)
     attachments = AttachmentSerializer(many=True, read_only=True)
     class Meta:
@@ -38,7 +48,7 @@ class MessageForTicketSerializer(serializers.ModelSerializer):
 class TicketSerializer(serializers.ModelSerializer):
     status = serializers.SerializerMethodField()
     ticket_category = serializers.SerializerMethodField()
-    messages = MessageSerializer(many=True, read_only=True)
+    messages = MessageAttachmentSerializer(many=True, read_only=True)
     message = MessageForTicketSerializer(write_only=True)
     order_id = serializers.PrimaryKeyRelatedField(queryset=OrderModel.objects.all(), write_only=True, source='order')
     order = OrderSerializer(read_only=True)