On 1 July 2015 at 16:51, John Lahr <[email protected]> wrote: > Can you limit the number of related records a given parent record has? > > Example. Class/Student relatoinship. A Class has_many students but I want > to limit the size of a class to a max 30 (of course minimum or exact numbers > would hopefully work the same way?)
There may be a better way but I would just use a validation that prevents further students being added to the class when the limit is released. By the way, can a student be in more than one class? If so then you need has and belongs to many or (which I prefer) has many through. 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/aadce5fd-8e2a-4596-9b68-b88c952354a2%40googlegroups.com. > For more options, visit https://groups.google.com/d/optout. -- 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%3D0gLu3J0a8d0p8dEsmcmaQYwPMYZaMu%2BQ2wCCG3A8iOzbehw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
