Oops! Yes indeed I need an "or" instead of "and", how I missed that?? :) Thank you all for your help and the advices!
On Oct 1, 8:31 pm, "Jeffrey L. Taylor" <[email protected]> wrote: > Quoting Yiannis <[email protected]>: > > > > > Hello > > > I have a strange problem with this code: > > > <%unless (@students.empty? and params[:commit].nil?) %> > > <%="test"%> > > <%= render :partial => 'results' %> > > <% end %> > > unless both conditions are true, render the partial > > the equivalent is: > > if [email protected]? || !params[:commit].nil? > > I suspect you want an 'or" instead of the 'and' in the 'unless'. I.e. unless > either condition is true, render the partial. > > unless @students.empty? or params[:commit].nil? > > equivalent: > > if [email protected]? and !params[:commit].nil? > > or: > > if [email protected]? and params[:commit] > > so the partial will be rendered if both there are students and params[:commit] > exists and is non-nil. > > I personally have stopped using 'unless' with complex arguments entirely and > am using it even with simple arguments less. > > Lookup De Morgan's Theorem (http://en.wikipedia.org/wiki/De_Morgan's_theorem) > and tattoo it on your arm or commit it to memory. > > HTH, > Jeffrey --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
