Add the required bits for Django's logger

So, you can't define handlers piecewise, and if you redefine a logger,
you have to also include everything it uses, because your "new" logger
doesn't have a reference to the original logging config to get things
like mail_admins and require_debug_false.

require_debug_true isn't strictly necessary here, but it seemed strange
to just copy over one of them.

bookwyrm/settings.py

@@ -110,18 +110,42 @@ LOG_LEVEL = env("LOG_LEVEL", "INFO").upper()
 # Override aspects of the default handler to our taste
 # See https://docs.djangoproject.com/en/3.2/topics/logging/#default-logging-configuration
 # for a reference to the defaults we're overriding
+#
+# It seems that in order to override anything you have to include its
+# entire dependency tree (handlers and filters) which makes this a
+# bit verbose
 LOGGING = {
     "version": 1,
     "disable_existing_loggers": False,
+    "filters": {
+        # These are copied from the default configuration, required for
+        # implementing mail_admins below
+        "require_debug_false": {
+            "()": "django.utils.log.RequireDebugFalse",
+        },
+        "require_debug_true": {
+            "()": "django.utils.log.RequireDebugTrue",
+        },
+    },
     "handlers": {
-        # Overrides the default handler, which does not log in prod
+        # Overrides the default handler to make it log to console
+        # regardless of the DEBUG setting (default is to not log to
+        # console if DEBUG=False)
         "console": {
             "level": LOG_LEVEL,
             "class": "logging.StreamHandler",
         },
+        # This is copied as-is from the default logger, and is
+        # required for the django section below
+        "mail_admins": {
+            "level": "ERROR",
+            "filters": ["require_debug_false"],
+            "class": "django.utils.log.AdminEmailHandler",
+        },
     },
     "loggers": {
-        # Override the log level for the default logger
+        # Install our new console handler for Django's logger, and
+        # override the log level while we're at it
         "django": {
             "handlers": ["console", "mail_admins"],
             "level": LOG_LEVEL,