SqlAlchemy Case with multiple conditions

Question

I am trying to do something like this:

x = db_session.query(
    Candidate,
    func.count(case([(Jobs.interview_type == 'PHONE_SCREEN' and Jobs.interview_type == 'INCLINED' , 1)])),
    func.count(case([(Jobs.interview_type == 'PHONE_SCREEN' and Jobs.interview_type == 'NOT_INCLINED', 1)])),
    func.count(case([(Jobs.interview_type == 'IN_HOUSE', 1)])),
    func.count(case([(Jobs.interview_type == 'EVALUATION', 1)]))
    ).\
    join(Jobs, Jobs.candidate_id == Candidate.candidate_id).\
    filter(Candidate.candidate_id == '6236738').\
    first()

However its not picking up the second condition in case. Is this possible?

I got it working with and_ but its not giving the right answer

func.count(case([(and_(Jobs.interview_type == 'PHONE_SCREEN', Jobs.interview_type == 'INCLINED'), 1)])),

should return 2, but its returning 0

Related: https://stackoverflow.com/questions/42681231/sqlalchemy-unexpected-results-when-using-and-and-or — Ilja Everilä, Apr 18 '19 at 17:23
What database are you using? Also, your logic is off; how could `interview_type` be PHONE_SCREEN and INCLINED at the same time? I'm guessing you meant to compare some other column against INCLINED. — Ilja Everilä, Apr 18 '19 at 17:23

score 3 · Accepted Answer · answered Apr 18 '19 at 15:27

3

You need to use sqlalchemy.and_ instead of the and operator:

and_(Jobs.interview_type == 'PHONE_SCREEN',
     Jobs.interview_type == 'INCLINED')

answered Apr 18 '19 at 15:27

Stephen Fuhry

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Thats right! I'm stuck trying to put everything together...my syntax is off. Can you include `func.count(case[(...)])` with that too? – Morgan Allen Apr 18 '19 at 15:30
I got it working, but its not returning the desired result. I put updated solution. can you take a look? – Morgan Allen Apr 18 '19 at 15:34
One thing to try is `distinct(func.count(case()))`, but I'd want to look at the SQL that sqlalchemy generates to debug it further. – Stephen Fuhry Apr 19 '19 at 13:31
@StephenFuhry Hi, how to use `and_` with more than 2 values ? https://stackoverflow.com/questions/67496386/sqlalchemy-case-with-multiple-conditions-and-more-than-two-values – Elsa May 12 '21 at 02:50

SqlAlchemy Case with multiple conditions

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