I''m trying to generate a simple navigation pane to include in my
application.rhtml. The nav pane consists of dynamic link_to tags that
are generated from data in a model.
I''m now used to doing trivial MVC operations in a template:
def index
@departments = Department.find(:all)
end
<!-- view (cheesy example) -->
<% @departments.each { |d|
<%= d.name +"<br>" %>
<% } %>
But what if I want to generate the @departments in application.rb? I
have no action to place it in (like index), and it does not seem to work
at the class level:
class ApplicationController < ActionController::Base
@departments = Department.find(:all)
end
Should this work and be available in application.rhtml as
@departments? If so then thats good news and my syntax is just wrong.
if not, is there an alternative way to populate an object in
application.rb and use it in application.rhtml?
Thx
Gary "still a newb" H.
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> I''m trying to generate a simple navigation pane to include in my > application.rhtml. The nav pane consists of dynamic link_to tags that > are generated from data in a model. > > I''m now used to doing trivial MVC operations in a template: > > def index > @departments = Department.find(:all) > end > > <!-- view (cheesy example) --> > <% @departments.each { |d| > <%= d.name +"<br>" %> > <% } %> > > But what if I want to generate the @departments in application.rb? I > have no action to place it in (like index), and it does not seem to work > at the class level: > > class ApplicationController < ActionController::Base > @departments = Department.find(:all) > end > > Should this work and be available in application.rhtml as > @departments? If so then thats good news and my syntax is just wrong. > > if not, is there an alternative way to populate an object in > application.rb and use it in application.rhtml?Well, if you want to generate that every time you could do this: class ApplicationController < ActionController::Base before_filter :load_departments def load_departments @departments = Department.find(:all) end end Or if you only want to load it once per application startup, do something similar in environment.rb and load it up as a constant or some such... --~--~---------~--~----~------------~-------~--~----~ 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-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
On 9/11/07, Gary Huntress <ghuntress-Wuw85uim5zDR7s880joybQ@public.gmane.org> wrote:> > I''m trying to generate a simple navigation pane to include in my > application.rhtml. The nav pane consists of dynamic link_to tags that > are generated from data in a model. > > I''m now used to doing trivial MVC operations in a template: > > def index > @departments = Department.find(:all) > end > > <!-- view (cheesy example) --> > <% @departments.each { |d| > <%= d.name +"<br>" %> > <% } %> > > But what if I want to generate the @departments in application.rb? I > have no action to place it in (like index), and it does not seem to work > at the class level: > > class ApplicationController < ActionController::Base > @departments = Department.find(:all) > end > > Should this work and be available in application.rhtml as > @departments? If so then thats good news and my syntax is just wrong.This would only run when the controller class is first loaded, which is probably not what you want. It''s also an instance variable of the *class* and not of the *request*, so you can''t access it from the view in the same way.> > if not, is there an alternative way to populate an object in > application.rb and use it in application.rhtml?The MVC police might arrest me, but I see no problem with just putting the find directly in the view in this case. If the find became elaborate, I would refactor the complexity back into a model class method (much easier to test, and keeps the view code as simple as possible). I don''t like the before_filter approach. It would unecessarily retrieve the departments even if you weren''t rendering the view (e.g. an xhr response or a post-redirect), it pollutes the request namespace, and it prevents optimization through fragment caching. --~--~---------~--~----~------------~-------~--~----~ 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-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---