address dpgaspar's comments

superset/utils/log.py

@@ -24,6 +24,7 @@
 from typing import Any, Callable, cast, Optional, Type
 
 from flask import current_app, g, request
+from sqlalchemy.exc import SQLAlchemyError
 
 from superset.stats_logger import BaseStatsLogger
 
@@ -173,6 +174,6 @@ def log(  # pylint: disable=too-many-locals
             sesh = current_app.appbuilder.get_session
             sesh.bulk_save_objects(logs)
             sesh.commit()
-        except Exception as ex:  # pylint: disable=broad-except
+        except SQLAlchemyError as ex:
             logging.error("DBEventLogger failed to log event(s)")
             logging.exception(ex)

superset/views/core.py

@@ -542,13 +542,13 @@ def explore_json(
     @expose("/import_dashboards", methods=["GET", "POST"])
     def import_dashboards(self) -> FlaskResponse:
         """Overrides the dashboards using json instances from the file."""
-        f = request.files.get("file")
-        if request.method == "POST" and f:
+        import_file = request.files.get("file")
+        if request.method == "POST" and import_file:
             success = False
             database_id = request.form.get("db_id")
             try:
                 dashboard_import_export.import_dashboards(
-                    db.session, f.stream, database_id
+                    db.session, import_file.stream, database_id
                 )
                 success = True
             except DatabaseNotFound as ex: