db: add memcache toggle

core/config.py

@@ -150,6 +150,12 @@ class DatabaseConfig:
             default=10000,
         )
 
+    @property
+    def enable_memcached(self) -> bool:
+        return CoreConfig.get_config_field(
+            self.__config, "core", "database", "enable_memcached", default=True
+        )
+
     @property
     def memcached_host(self) -> str:
         return CoreConfig.get_config_field(

core/data/cache.py

@@ -17,7 +17,7 @@ except ModuleNotFoundError:
 
 def cached(lifetime: int = 10, extra_key: Any = None) -> Callable:
     def _cached(func: Callable) -> Callable:
-        if has_mc:
+        if has_mc and (cfg and cfg.database.enable_memcached):
             hostname = "127.0.0.1"
             if cfg:
                 hostname = cfg.database.memcached_host

example_config/core.yaml

@@ -24,6 +24,7 @@ database:
   sha2_password: False
   loglevel: "warn"
   user_table_autoincrement_start: 10000
+  enable_memcached: True
   memcached_host: "localhost"
 
 frontend: