Is there a wild card character for selecting everything with SQLAlchemy's "filter"?
var = '*'
session.query().filter(results.name == var)
Where '*' is anything or all and 'var' changes based on the user's selection. When the user selects all, I would like this to return as if the filter was not applied.
I may be approaching this wrong in which case here is an explanation of my use case. I am using flask and plotly to create a simple webpage where the user can select from 3 drop down boxes that subsets a data set and creates a line plot. One of the options in each of the 3 selection boxes is "All", as in do not apply the filter.
Using filter
condition = results.name == var
if want == 'all' or want == '*':
condition = True
session.query().filter(condition)
Using where
condition = results.name == var
if want == 'all' or want == '*':
condition = True
session.query().where(condition)
Using expression
with where
from sqlalchemy import true
session.query().filter(true() if user_selection == '*' else results.name == var)
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