fix: Added message flash when chart with missing dataset is accessed.

superset/views/core.py

@@ -702,7 +702,14 @@ def explore(  # pylint: disable=too-many-locals,too-many-return-statements
             datasource_id, datasource_type = get_datasource_info(
                 datasource_id, datasource_type, form_data
             )
-        except SupersetException:
+        except SupersetException as ex:
+            flash(
+                _(
+                    "Error occurred when opening the chart: %(error)s",
+                    error=utils.error_msg_from_exception(ex),
+                ),
+                "danger",
+            )
             return redirect(error_redirect)
 
         datasource = ConnectorRegistry.get_datasource(

superset/views/utils.py

@@ -220,7 +220,7 @@ def get_datasource_info(
 
     if not datasource_id:
         raise SupersetException(
-            "The datasource associated with this chart no longer exists"
+            "The dataset associated with this chart no longer exists"
         )
 
     datasource_id = int(datasource_id)

tests/core_tests.py

@@ -863,7 +863,7 @@ def test_slice_payload_no_datasource(self):
 
         self.assertEqual(
             data["errors"][0]["message"],
-            "The datasource associated with this chart no longer exists",
+            "The dataset associated with this chart no longer exists",
         )
 
     @pytest.mark.usefixtures("load_birth_names_dashboard_with_slices")

tests/tasks/async_queries_tests.py

@@ -124,5 +124,5 @@ def test_load_explore_json_into_cache_error(self, mock_update_job):
         with pytest.raises(SupersetException):
             load_explore_json_into_cache(job_metadata, form_data)
 
-        errors = ["The datasource associated with this chart no longer exists"]
+        errors = ["The dataset associated with this chart no longer exists"]
         mock_update_job.assert_called_with(job_metadata, "error", errors=errors)