Rails helpers issue #341

prashantham opened this Issue Oct 5, 2012 · 4 comments


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5 participants

I am having issue with rails helpers when templates are rendered directly

Rabl.render(comment, 'comments/show', :view_path => 'app/views', :format => :hash)
=> undefined method `number_to_human_size' for #Rabl::Engine:0x00000003843110

But no issues when sent through server.
Are the helpers not available when rendered directly?


nesquena commented Oct 5, 2012

You have to pass a 'scope' that has access to those helpers. If you are in a controller or view the its automatic because the 'scope' is by default self. But if not, you need to provide a scope that has access:

Rabl.render(comment, 'comments/show', :view_path => 'app/views', 
  :format => :hash, :scope => @has_access_to_helpers)

databyte commented Oct 17, 2012

Yep, if you just pass in your actual controller or helper into scope - it should work.

Hello! I have the simmilar issue. I have a code in my controller

@posts = Post.order_by([:created_at, :desc]).page(1)
posts = Rabl.render(nil, 'posts/index', :view_path => 'app/views', :format => :hash, :scope => self)

My view

object false
node(:current_page) { @posts.current_page }
node(:total_items) { @posts.total_count }
node(:per_page) { @posts.limit_value }
node(:total_pages) { (@posts.offset_value / @posts.limit_value) + 1 }
node :items do
  @posts.map do |p|
    partial 'posts/post', object: p, root: false

As you can see i have a partial in my template. So when i call this page i got

Missing partial posts/post with {:locale=>[:ru, :en], :formats=>[nil], :handlers=>[:erb, :builder, :haml, :rabl]}. Searched in: * "/Users/vintik/Projects/backbone-twitter-bootstrap/app/views" * "/Users/vintik/.rvm/gems/ruby-1.9.3-p125/gems/twitter-bootstrap-rails-2.1.4/app/views" * "/Users/vintik/.rvm/gems/ruby-1.9.3-p125/gems/kaminari-0.14.1/app/views" * "/Users/vintik/.rvm/gems/ruby-1.9.3-p125/gems/devise-2.1.2/app/views" * "/Users/vintik/Projects/tbone-devise/app/views" * "/Users/vintik/Projects/tbone/app/views"

I tried another approach in my controller

@posts = Post.order_by([:created_at, :desc]).page(1)
posts = JSON.parse(render_to_string('posts/index.json.rabl'))

And it works. But it is really bad to convert to json and back.

@ghost ghost assigned databyte Nov 20, 2012

If you are using Rabl with Grape and are having trouble accessing view helpers within Rabl templates when an API call is made to Grape, use this - https://gist.github.com/4419597

Assumes that your Rabl templates are in a /views/api/ path - should make a difference though if you have set this as root.

@nesquena nesquena closed this Sep 3, 2013

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