Ok, So it seems that this whole tutorial ordering thing seems to be the best way to go (thanks to philip anyway for giving me the code to do it with ids if I wanted to); The problem is I'm really a complete noob in RoR. I know how to create migrations, however creating a "position" variable i which they were independent to the category the tutorials were in; I have absolutely no idea how to do that. And you talk about writing methods, I also do not know where these methods would be created (inside a controller perhaps?).
Any help with this task would be kindly appriciated, Thanks In Advance, Joe On May 2, 7:18 pm, Philip Hallstrom <phi...@pjkh.com> wrote: > >> The tutorials are then displayed in order of there id (auto- > >> incrementing) in their categories show method. > >> The thing is, I want to create a link that goes from one tutorial > >> (with an id of 10 for example) to the next tutorial in that category > >> (which might not have an id of 11, as I create different tutorials at > >> different times, therefore creating different ids for two tutorials > >> seemingly next to eachother in order). > > >> Obviously I know I will need something like this: > >> <%= link_to 'Next lesson....', %> > > >> but I just don't know how I can manage it.. > > >> By the way, every tutorial has a: category_id to determain which > >> category they are in (this is an integer). > > > If I were you, i'd create a position column on tutorials, which > > determines the ordering of tutorials for a category (ordering by id > > might seem the simplest but stops you from ever reordering tutorials. > > Given a tutorial, the next one is the first one in the same category > > whose position is greater than the current ones (you could write a > > next_tutorial method on tutorial). There's a plugin called > > acts_as_list that you might find helpful maintaining the position > > column. If you're hell bent on ordering by id then it's as if id is > > your position column > > > Fred > > I agree with Fred as it allows you to easily re-order the tutorials if > you want to, but if you don't... then... > > next_tutorial = Tutorial.find(:conditions => ["id > ? AND category_id > = ?", current_tutorial_id, current_category_id], :order => > 'id', :limit => 1) > > prev_tutorial = Tutorial.find(:conditions => ["id < ? AND category_id > = ?", current_tutorial_id, current_category_id], :order => 'id > DESC', :limit => 1) > > -- > 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 rubyonrails-t...@googlegroups.com. > To unsubscribe from this group, send email to > rubyonrails-talk+unsubscr...@googlegroups.com. > For more options, visit this group > athttp://groups.google.com/group/rubyonrails-talk?hl=en. -- 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 rubyonrails-t...@googlegroups.com. To unsubscribe from this group, send email to rubyonrails-talk+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
