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fix: prevent ForeignKeyViolation error on delete #23414

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merged 3 commits into from
Mar 21, 2023
Merged

fix: prevent ForeignKeyViolation error on delete #23414

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d1a3fb9
fix: prevent ForeignKeyViolation error on delete
betodealmeida Mar 17, 2023
2f756c7
Fix type
betodealmeida Mar 17, 2023
2d9abb0
Remove ondelete
betodealmeida Mar 21, 2023
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7 changes: 6 additions & 1 deletion superset/charts/commands/delete.py
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Original file line number Diff line number Diff line change
Expand Up @@ -15,7 +15,7 @@
# specific language governing permissions and limitations
# under the License.
import logging
from typing import Optional
from typing import cast, Optional

from flask_appbuilder.models.sqla import Model
from flask_babel import lazy_gettext as _
Expand Down Expand Up @@ -45,8 +45,13 @@ def __init__(self, model_id: int):

def run(self) -> Model:
self.validate()
self._model = cast(Slice, self._model)
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is this necessary? The doc said This returns the value unchanged. but only good for type checker

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@betodealmeida betodealmeida Mar 22, 2023 •
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It's needed to make the type checker happy.

On __init__ self._model will be set to None. When we call self.validate() it will either set self._model to a Slice or raise an exception, so here we're telling the type checker that we know self._model is of type Slice.

try:
Dashboard.clear_cache_for_slice(slice_id=self._model_id)
# Even though SQLAlchemy should in theory delete rows from the association
# table, sporadically Superset will error because the rows are not deleted.
# Let's do it manually here to prevent the error.
self._model.owners = []
chart = ChartDAO.delete(self._model)
except DAODeleteFailedError as ex:
logger.exception(ex.exception)
Expand Down
7 changes: 6 additions & 1 deletion superset/datasets/commands/delete.py
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Original file line number Diff line number Diff line change
Expand Up @@ -15,7 +15,7 @@
# specific language governing permissions and limitations
# under the License.
import logging
from typing import Optional
from typing import cast, Optional

from flask_appbuilder.models.sqla import Model
from sqlalchemy.exc import SQLAlchemyError
Expand Down Expand Up @@ -43,7 +43,12 @@ def __init__(self, model_id: int):

def run(self) -> Model:
self.validate()
self._model = cast(SqlaTable, self._model)
try:
# Even though SQLAlchemy should in theory delete rows from the association
# table, sporadically Superset will error because the rows are not deleted.
# Let's do it manually here to prevent the error.
self._model.owners = []
dataset = DatasetDAO.delete(self._model, commit=False)
db.session.commit()
except (SQLAlchemyError, DAODeleteFailedError) as ex:
Expand Down
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