Fix user role caching issues (#8973)

* Fix user role caching issues

* Handle null user case

* Fix typo

* More spelling fixes

src/backend/InvenTree/stock/api.py

@@ -321,7 +321,7 @@ class StockLocationFilter(rest_filters.FilterSet):
     def filter_parent(self, queryset, name, value):
         """Filter by parent location.
 
-        Note that the filtering behaviour here varies,
+        Note that the filtering behavior here varies,
         depending on whether the 'cascade' value is set.
 
         So, we have to check the "cascade" value here.

src/backend/InvenTree/stock/models.py

@@ -328,12 +328,12 @@ def default_delete_on_deplete():
     """Return a default value for the 'delete_on_deplete' field.
 
     Prior to 2022-12-24, this field was set to True by default.
-    Now, there is a user-configurable setting to govern default behaviour.
+    Now, there is a user-configurable setting to govern default behavior.
     """
     try:
         return get_global_setting('STOCK_DELETE_DEPLETED_DEFAULT', True)
     except (IntegrityError, OperationalError):
-        # Revert to original default behaviour
+        # Revert to original default behavior
         return True
 
 

src/backend/InvenTree/stock/test_api.py

@@ -561,7 +561,7 @@ class StockItemListTest(StockAPITestCase):
 
         self.assertEqual(response.status_code, status.HTTP_200_OK)
 
-        # Return JSON-ified data
+        # Return JSON data
         return response.data
 
     def test_top_level_filtering(self):
@@ -1305,7 +1305,7 @@ class StockItemTest(StockAPITestCase):
             expected_code=201,
         )
 
-    def test_stock_item_create_withsupplierpart(self):
+    def test_stock_item_create_with_supplier_part(self):
         """Test creation of a StockItem via the API, including SupplierPart data."""
         # POST with non-existent supplier part
         response = self.post(
@@ -1543,7 +1543,7 @@ class StockItemTest(StockAPITestCase):
         self.assertEqual(data['purchase_price_currency'], 'NZD')
 
     def test_install(self):
-        """Test that stock item can be installed into antoher item, via the API."""
+        """Test that stock item can be installed into another item, via the API."""
         # Select the "parent" stock item
         parent_part = part.models.Part.objects.get(pk=100)
 

src/backend/InvenTree/users/models.py

@@ -8,7 +8,6 @@ from django.contrib.auth import get_user_model
 from django.contrib.auth.models import Group, Permission, User
 from django.contrib.contenttypes.fields import GenericForeignKey
 from django.contrib.contenttypes.models import ContentType
-from django.core.cache import cache
 from django.core.validators import MinLengthValidator
 from django.db import models
 from django.db.models import Q, UniqueConstraint
@@ -21,6 +20,7 @@ from django.utils.translation import gettext_lazy as _
 import structlog
 from rest_framework.authtoken.models import Token as AuthToken
 
+import InvenTree.cache
 import InvenTree.helpers
 import InvenTree.models
 from common.settings import get_global_setting
@@ -666,28 +666,20 @@ def update_group_roles(group, debug=False):
                         )
 
 
-def clear_user_role_cache(user: User):
-    """Remove user role permission information from the cache.
-
-    - This function is called whenever the user / group is updated
-
-    Args:
-        user: The User object to be expunged from the cache
-    """
-    for role in RuleSet.get_ruleset_models():
-        for perm in ['add', 'change', 'view', 'delete']:
-            key = f'role_{user.pk}_{role}_{perm}'
-            cache.delete(key)
-
-
-def check_user_permission(user: User, model, permission):
+def check_user_permission(user: User, model, permission) -> bool:
     """Check if the user has a particular permission against a given model type.
 
     Arguments:
         user: The user object to check
-        model: The model class to check (e.g. Part)
+        model: The model class to check (e.g. 'part')
         permission: The permission to check (e.g. 'view' / 'delete')
+
+    Returns:
+        bool: True if the user has the specified permission
     """
+    if not user:
+        return False
+
     if user.is_superuser:
         return True
 
@@ -695,21 +687,26 @@ def check_user_permission(user: User, model, permission):
     return user.has_perm(permission_name)
 
 
-def check_user_role(user: User, role, permission):
+def check_user_role(user: User, role, permission) -> bool:
     """Check if a user has a particular role:permission combination.
 
-    If the user is a superuser, this will return True
+    Arguments:
+        user: The user object to check
+        role: The role to check (e.g. 'part' / 'stock')
+        permission: The permission to check (e.g. 'view' / 'delete')
+
+    Returns:
+        bool: True if the user has the specified role:permission combination
     """
+    if not user:
+        return False
+
     if user.is_superuser:
         return True
 
-    # First, check the cache
-    key = f'role_{user.pk}_{role}_{permission}'
-
-    try:
-        result = cache.get(key)
-    except Exception:  # pragma: no cover
-        result = None
+    # First, check the session cache
+    cache_key = f'role_{user.pk}_{role}_{permission}'
+    result = InvenTree.cache.get_session_cache(cache_key)
 
     if result is not None:
         return result
@@ -736,11 +733,8 @@ def check_user_role(user: User, role, permission):
                     result = True
                     break
 
-    # Save result to cache
-    try:
-        cache.set(key, result, timeout=3600)
-    except Exception:  # pragma: no cover
-        pass
+    # Save result to session-cache
+    InvenTree.cache.set_session_cache(cache_key, result)
 
     return result
 
@@ -923,12 +917,6 @@ def delete_owner(sender, instance, **kwargs):
     owner.delete()
 
 
-@receiver(post_save, sender=get_user_model(), dispatch_uid='clear_user_cache')
-def clear_user_cache(sender, instance, **kwargs):
-    """Callback function when a user object is saved."""
-    clear_user_role_cache(instance)
-
-
 @receiver(post_save, sender=Group, dispatch_uid='create_missing_rule_sets')
 def create_missing_rule_sets(sender, instance, **kwargs):
     """Called *after* a Group object is saved.
@@ -936,6 +924,3 @@ def create_missing_rule_sets(sender, instance, **kwargs):
     As the linked RuleSet instances are saved *before* the Group, then we can now use these RuleSet values to update the group permissions.
     """
     update_group_roles(instance)
-
-    for user in get_user_model().objects.filter(groups__name=instance.name):
-        clear_user_role_cache(user)

src/backend/InvenTree/users/test_api.py

@@ -206,7 +206,7 @@ class UserTokenTests(InvenTreeAPITestCase):
 
         self.client.get(me, expected_code=200)
 
-    def test_buildin_token(self):
+    def test_builtin_token(self):
         """Test the built-in token authentication."""
         response = self.post(
             reverse('rest_login'),