Fixed a silent error handler error

Author: pulk17

mod_api/middleware/error_handler.py

@@ -131,3 +131,14 @@ def handle_sqlalchemy_error(error):
         'An unexpected database error occurred.',
         http_status=500,
     )
+
+
+@mod_api.after_app_request
+def convert_api_errors_to_json(response):
+    """Catch routing errors that were handled by global app handlers and convert them to JSON."""
+    if request.path.startswith(_API_PREFIX):
+        if response.status_code == 404:
+            return make_error_response('not_found', 'Resource not found.', http_status=404)
+        if response.status_code == 405:
+            return make_error_response('method_not_allowed', 'Method not allowed.', http_status=405)
+    return response