On 15 June 2014 09:29, Ronald Fischer <[email protected]> wrote: > My solution works, but I wonder if there is a better one. > > I have a model (:cards), which has a foreign key :box_id. I am > interested in the id's of those cards which have a certain box_id. > Currently I assume that I can easily hold an array of all thos :cards in > memory (i.e. no cursor needed).
Assuming that you have the relationships setup accordingly (so card belongs_to box and box has_many cards or something similar) then to get the cards belonging to a certain box you can just use @cards = @box.cards then to get the id of each box in just use box.id If the above does not make sense then I suggest you work right through a good tutorial such as railstutorial.org, which is free to use online, which will show you the basics of Rails. Colin -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/rubyonrails-talk/CAL%3D0gLtzUwcFhgeRgczSFyT21cnDXSSWfUStk5g4KjzoOYicSw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
