web2py query display results

Question

I am writing a web2py query to run against the database but it won't display the results as i get an error stating Set: No tables selected...

I was wondering if some one can help me out with this?

The table I was to run the query against is:

db.define_table('Flight',
    Field('FlightNum', type = 'string', length = 10, notnull = True),
    Field('PlaneID', type = 'string', length = 10, notnull = True),
    Field('DepartureLocation', type = 'string', length = 20, notnull = True),
    Field('ArrivalLocation', type = 'string', length = 20, notnull = True),
    Field('DepartureDate', type='date'),
    Field('ArrivalDate', type='date'),
    Field('DepartureTime', type = 'time'),
    Field('ArrivalTime', type = 'time'))

My query is:

def displayFlights():
    tuples=db((db.Flight.DepartureLocation is request.vars.DepartureLocation)&
       (db.Flight.ArrivalLocation is request.vars.ArrivalLocation)&
       (db.Flight.DepartureDate is request.vars.DepartureDate)&
       (db.Flight.ArrivalDate is request.vars.DepartureDate)).select()
    return dict(tuples=tuples)

Can some one please help me correct this query?

Answer 1

Queries must be constructed with ==, not is:

db.Flight.DepartureLocation == request.vars.DepartureLocation