update on dataloaders

v3-release-notes.md

@@ -248,6 +248,76 @@ search=String(
             required=False,
         )
 ```
+### `Dataloaders` are no longer supported for django as they require async views
+
+Before:
+
+```python3
+def resolve_client(root, info, **kwargs):
+        return info.context.loaders.client_by_client_id_loader.load(root["client_id"])
+```
+loader definition:
+```python3
+from promise import Promise
+from promise.dataloader import DataLoader
+from typing import Dict
+from collections import defaultdict
+
+from server.domain.entities import Clients
+
+
+class ClientByClientIdLoader(DataLoader):
+    def __init__(self, *args, **kwargs):
+        self.current_user = kwargs.pop("current_user")
+
+        super().__init__(*args, **kwargs)
+
+    def batch_load_fn(self, client_ids):
+        id_client: Dict[int, Clients.Client] = defaultdict(None)
+
+        clients = Clients.by_ids(
+            current_user=self.current_user,
+            ids=client_ids,
+        )
+
+        for client in clients:
+            id_client[client["id"]] = client
+
+        return Promise.resolve(
+            [id_client.get(client_id, None) for client_id in client_ids]
+        )
+```
+
+After (currently this approach won't work) [check this issue](https://stackoverflow.com/questions/76900691/django-working-example-of-graphene-aiodataloader)
+
+
+```python3
+from aiodataloader import DataLoader
+from typing import Dict
+from collections import defaultdict
+
+from server.domain.entities import Clients
+
+
+class ClientByClientIdLoader(DataLoader):
+    def __init__(self, *args, **kwargs):
+        self.current_user = kwargs.pop("current_user")
+
+        super().__init__(*args, **kwargs)
+
+    async def batch_load_fn(self, client_ids):
+        id_client: Dict[int, Clients.Client] = defaultdict(None)
+
+        clients = Clients.by_ids(
+            current_user=self.current_user,
+            ids=client_ids,
+        )
+
+        for client in clients:
+            id_client[client["id"]] = client
+
+        return [id_client.get(client_id, None) for client_id in client_ids] 
+```
 
 ### Other breaking changes