On 4 February 2016 at 15:30, John Sanderbeck <li...@ruby-forum.com> wrote: > I am new to Rails and Ruby and am having a difficult time building the > data needed for a Highchart. I am struggling with the syntax to map a > pair of hashes to an array. Let me try and explain: > > I have a table of "initiatives" which contains basically an ID and a > Name. > > Then I have a table "trainings" that has the initiative_id field to map > to the initiative table > > What I am trying to do is create a method that pulls the Initiative name > and the count of records from the trainings, and returns an array with > [[name,count],[name,count]] > > What I have been trying is this > > def training_count_by_initiative() > initiative_name = Initiative.all.select("id,name") > training_count = Training.group(:initiative_id).count > initiative_name.map do |initiative| > ??? This is the part I am struggling with > end > end > > I tried following Railscasts #223 but can't seem to get the mapping to > work. > > I know it is just a Ruby syntax issue that I am not understanding so if > someone can explain it to me I would greatly appreciate it.
You don't need the first two lines, you just need something like Initiative.all.map {|initiative| [initiative.name, initiative.trainings.count] } 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 rubyonrails-talk+unsubscr...@googlegroups.com. To post to this group, send email to rubyonrails-talk@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/rubyonrails-talk/CAL%3D0gLvX0xJu5_vR8VZ8tYvxy57n_TiRaAfpB2rVV7nN8MWZFw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.