SQLALchemy: update with in clause from kwargs
MRAB
python at mrabarnett.plus.com
Tue Aug 3 22:19:30 EDT 2021
On 2021-08-04 02:08, Larry Martell wrote:
> I am trying to write a function that takes kwargs as a param and
> generates an update statement where the rows to be updated are
> specified in an in clause.
>
> Something like this:
>
> def update_by_in(self, **kwargs):
> filter_group = []
> for col in kwargs['query_params']:
> # obviously this line does not work as col is a string,
> but this is the intent
> filter_group.append(col.in_(tuple(kwargs['query_params'][col])))
>
> self._session.query(self.model_class).filter(*filter_group).update(kwargs['values'])
>
> self.update_by_in(
> **{'query_params': {'companyCode': ['A', 'B', 'C']},
> 'values': {'portfolioName': 'test'}}
> )
>
> Is there a way to do this? I think I need to use setattr in building
> up the filter_group list, but I'm not quite sure how to do it.
>
If it's any help, on this page:
https://docs.sqlalchemy.org/en/14/core/metadata.html
it has this:
# access the column "employee_id":
employees.columns.employee_id
# or just
employees.c.employee_id
# via string
employees.c['employee_id']
More information about the Python-list
mailing list