Question

I’m having a hard time rendering a view in Haml,using MongoMapper for a small Sinatra app I’m working on.
I have this here which I know the query is not bad:

get '/admin' do
  protected!
  @title = "admin"

  @total_items = Item.all(:order=>:itemtype.desc)

  haml :admin, :locals => @total_items
end

Now, the problem is , I’m trying to use the @total_items instance variable in my Haml view to be able to output the keys in an ordered list after retrieving each item with the loop:

%div 
  %img     
  - @total_items.each do |item|
  %h3= item

and I’m stuck.How do I access the keys? Thanks!

Answer 1

There are some issues with your code at hand:

If you use instance variables you don’t need to use :locals. They are accessible in your views anyway. So either use total_items and make use of :locals or use @total_items and access them as that in your views. BTW, :locals are used like that:

haml  :admin, :locals => {:items => total_items}

then you can access in admin.haml your total_items as items

Back to your question: In your admin.haml file there is a small error that is easy to fix: Make sure you get the indentation right. After all this is what haml is about:

%div 
  %img     
  -items.each do |item| # I use the above mentioned :locals with items instead of total_items
    %h3= item

Edit:
You could even keep it more simple by querying the items from your view:

%div 
  %img     
  -Item.all(:order=>:itemtype.desc).each do |item|
    %h3= item

PS: What is the %img tag good for? It’s not used in your example.