refactor: carrier proxies to only be generated for django admin and p…

…revent migration requirement

modules/core/karrio/server/providers/admin.py

@@ -353,5 +353,6 @@ def has_module_permission(self, request):
         return False
 
 
-for carrier_name, proxy in providers.CARRIER_PROXIES.items():
+for carrier_name, display_name in ref.collect_references()["carriers"].items():
+    proxy = providers.create_carrier_proxy(carrier_name, display_name)
     admin.site.register(proxy, model_admin(carrier_name, proxy))

modules/core/karrio/server/providers/models/__init__.py

@@ -21,7 +21,7 @@
     WEIGHT_UNITS,
     DIMENSION_UNITS,
     CAPABILITIES_CHOICES,
-    CARRIER_PROXIES,
+    create_carrier_proxy,
 )
 import karrio.server.providers.extension.models as extensions
 

modules/core/karrio/server/providers/models/carrier.py

@@ -1,6 +1,5 @@
 import typing
 import functools
-from django import dispatch
 import django.conf as conf
 import django.forms as forms
 import django.db.models as models
@@ -307,9 +306,3 @@ def get_queryset(self):
             "system_carriers": _SystemCarrierManager(),
         },
     )
-
-
-CARRIER_PROXIES = {
-    f"{carrier_name}": create_carrier_proxy(carrier_name, display_name)
-    for carrier_name, display_name in ref.collect_references()["carriers"].items()
-}

modules/manager/karrio/server/manager/serializers/shipment.py

@@ -638,7 +638,11 @@ def create_shipment_tracker(shipment: typing.Optional[models.Shipment], context)
     if (
         rate_provider != shipment.carrier_name
     ) and rate_provider in dataunits.CARRIER_NAMES:
-        carrier = providers.CARRIER_PROXIES[rate_provider].access_by(context).first()
+        carrier = (
+            providers.Carrier.access_by(context)
+            .filter(carrier_code=rate_provider)
+            .first()
+        )
 
     # Handle hub extension tracking
     if shipment.selected_rate_carrier.gateway.is_hub and carrier is None: