fix: refactor view error handling into a separate module (#29330)

superset/views/core.py

@@ -23,7 +23,7 @@ from datetime import datetime
 from typing import Any, Callable, cast
 from urllib import parse
 
-from flask import abort, flash, g, redirect, render_template, request, Response
+from flask import abort, flash, g, redirect, request, Response
 from flask_appbuilder import expose
 from flask_appbuilder.security.decorators import (
     has_access,
@@ -85,11 +85,10 @@ from superset.views.base import (
     data_payload_response,
     deprecated,
     generate_download_headers,
-    get_error_msg,
-    handle_api_exception,
     json_error_response,
     json_success,
 )
+from superset.views.error_handling import handle_api_exception
 from superset.views.utils import (
     bootstrap_user_data,
     check_datasource_perms,
@@ -888,13 +887,6 @@ class Superset(BaseSupersetView):
         datasource.raise_for_access()
         return json_success(json.dumps(sanitize_datasource_data(datasource.data)))
 
-    @app.errorhandler(500)
-    def show_traceback(self) -> FlaskResponse:
-        return (
-            render_template("superset/traceback.html", error_msg=get_error_msg()),
-            500,
-        )
-
     @event_logger.log_this
     @expose("/welcome/")
     def welcome(self) -> FlaskResponse: