Thanks a lot! On Sat, Sep 3, 2016 at 7:58 PM, Anthony <[email protected]> wrote:
> If you mean that request.args(0) contains the name of the restaurant, then > you need a join: > > t = db((db.Menu.Restaurant == db.Restaurant.id) & > (db.Restaurant.name == request.args(0))).select(db.Menu.id).first() > > Note, in that case, the Menu id will be in t.Menu.id rather than just t.id > . > > You can also use a reverse recursive select (which will result in two > queries rather than just one): > > t = db.Restaurant(name=request.args(0)).Menu.select(db.Menu.id).first() > > A simpler option might be to make request.args(0) be the id of the > restaurant instead of the name -- then you can just do: > > t = db.Menu(restaurant=request.args(0)) > > Finally, if each restaurant has only one menu, then why not just move the > menu field(s) into the Restaurant table? > > Anthony > > > > > > On Friday, September 2, 2016 at 2:27:23 PM UTC-4, @brooks wrote: >> >> I want to select those records in the Menu table such that the name of >> the restaurant with id in the Menu.restaurant field >> ==request.args(0).So,what should be the DAL query here? >> >> >> On Fri, Sep 2, 2016 at 6:51 PM, Anthony <[email protected]> wrote: >> >>> indices=db(db.Menu).select() >>>> for index in indices: >>>> t=db(index.restaurant.Name==request.args[0]).select(db.Menu. >>>> ALL).first() >>>> >>> >>> Above, index.restaurant.Name is simply a string value (the name of the >>> restaurant in question), as is request.args(0). Therefore, >>> index.restaurant.Name==request.args(0) is not a DAL Query object but >>> simply a standard Python boolean that is either True or False. Regardless >>> of the value of that boolean, the results of the query will be the same -- >>> all records from db.Menu will be selected. >>> >>> Perhaps you can explain what you are trying to achieve here. >>> >>> Anthony >>> >>> -- >>> Resources: >>> - http://web2py.com >>> - http://web2py.com/book (Documentation) >>> - http://github.com/web2py/web2py (Source code) >>> - https://code.google.com/p/web2py/issues/list (Report Issues) >>> --- >>> You received this message because you are subscribed to a topic in the >>> Google Groups "web2py-users" group. >>> To unsubscribe from this topic, visit https://groups.google.com/d/to >>> pic/web2py/E4VyjG0jS94/unsubscribe. >>> To unsubscribe from this group and all its topics, send an email to >>> [email protected]. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> -- > Resources: > - http://web2py.com > - http://web2py.com/book (Documentation) > - http://github.com/web2py/web2py (Source code) > - https://code.google.com/p/web2py/issues/list (Report Issues) > --- > You received this message because you are subscribed to a topic in the > Google Groups "web2py-users" group. > To unsubscribe from this topic, visit https://groups.google.com/d/ > topic/web2py/E4VyjG0jS94/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
