I am trying to query a database for records that have a string field inside an input search string.
Something like this:
User.query.filter(User.name in search_string)
Of course that does not work since it is not a valid SQLAlchemy statement. This seems a simple problem but I really can’t find the right column operator.
I tried the in_ operator:
User.query.filter(User.name.in_(search_string)
But that of course is not working. What I need is a is_substring operator.
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Answer
In SQL it would be
SELECT * FROM user
WHERE 'search string' LIKE CONCAT('%', name, '%')
SQLAlchemy contains(other) produces the clause LIKE '%<other>%'
from sqlalchemy import literal User.query.filter(literal(search_string).contains(User.name))