Add support for view helpers in RABL templates about rabl

[nesquena]

@thenetduck I think I have already got this working (i.e you can access all route and helper methods in RABL templates). I can't push to GH right now because the partition that RABL is on is full but once I do it would be great if you could test the 'edge' rabl in the repo and confirm helpers now work. Will comment again when they free up space and I can push.

[nesquena]

@thenetduck Ok view helpers should be fully accessible now in git version, can you try and get back to me?

gem 'rabl', :git => "git://github.com/nesquena/rabl.git"

[mpagalan]

@nesquena its working on my side using the git version, for sake of testing I used a Date Helper and Translation Helper

=== in rabl template
collection @compute_types
  attributes :id, :name
  node(:created) {|compute_type| time_ago_in_words(compute_type.created_at) + t('common.ago', :default => ' ago')}

=== in response body
[{
    "compute_type": {
        "created": "2 months  ago",
        "name": "Amazing Compute",
        "id": 66
    }
}]

[nesquena]

Ok great, I will release a new gem version, thanks!

[fourcolors]

Hey guys sorry I feel asleep :) Sounds like its working. I'll implement and give some feedback here in a couple of hours.

You guys rock! Thanks

[nesquena]

@thenetduck Thanks let me know if it works and if you run into any other issues.

[fourcolors]

I don't know if this is realated but in rails I get this error when the gem is installed
No such file or directory - git ls-files

I read this article http://rubyroyd.com/2010/11/17/no-such-file-or-directory-git-ls-files

I'm using rvm + passenger + rails and don't know if that effects anything. Is this a local issue or a gem issue?

[nesquena]

Yeah seems like an issue with the way the gemspec works: https://github.com/nesquena/rabl/blob/master/rabl.gemspec

Although that is the stock bundler generated gemspec type template. Seems like it isn't able to find the git executable. Does this prevent the Rails app from running when RABL is in the Gemfile?

[fourcolors]

Yes. It breaks my app. This is interesting though. If I have this

gem 'rabl'

it works just fine, however if I'm pointing to your git repo

gem 'rabl', :git => "git://github.com/nesquena/rabl.git"

This breaks it.

[nesquena]

Fascinating, so using the gem version, everything is OK? I have used both and never run into this problem. I guess just stick to stable for now :|

[fourcolors]

yoki dokie

[nesquena]

Let me know if you run into any other issues, thanks!

[volkanunsal]

Is this feature working? It was closed a year ago but I am still seeing it in the gem. Maybe I should use the Github version?

[nesquena]

Can you post an example of what isn't working. Are you using Rails? What version? If it helps here's the line that should be proxying to the 'context_scope' (i.e the controller): https://github.com/nesquena/rabl/blob/master/lib/rabl/engine.rb#L242

[volkanunsal]

Yes, I'm using Rails 3.2.3. The error I am getting is

NoMethodError (undefined method `strip_tags' for

#Rabl::Engine:0x007fc8a0750f10): app/views/api/events.rabl:8:in `block (2 levels) in render'

The context of the code where this is thrown is as follows:

child(@events) {
  node(:description){|m|
    strip_tags(m.description)
  }
}

On Sun, Jul 15, 2012 at 6:09 PM, Nathan Esquenazi <
[email protected]

wrote:

context_scope

[nesquena]

Interesting, I'll take look soon and hopefully fix this. That is odd.

[dkharrat]

I'm seeing the same issue as well. Using Rails 3.2.6. Haven't tried it with a previous rails version though, so I'm not sure if it was working before.

[ekorneeff]

its not working for me too (Rails 3.2.6, RABL 0.7.1):

node(:created_at){ |x| time_ago_in_words(x.created_at) }
# => undefined method `time_ago_in_words' for #<Rabl::Engine:0x007fb584931e08>

[databyte]

It's possible it's a scoping problem or something odd with your rendering process.

The best thing to do is throw a debugger in a node there and see what x is. Sometimes the helpers and values are not where you'd expect them to be.

node(:debug_me) {|x| debugger; puts x }

If you're not familiar with debugging RABL directly, I actually wrote a little blog post on it with examples in RABL including links back to Issues like this. Scroll down to "I HAZ DEBUGGER!" for the examples.

I also reconfirmed that RABL didn't break anything. I just pushed another test showing your exact case.

Here are the results:

{
    "article"=>{
        "title"=>"Foo",
        "body"=>"Bar",
        "posted_at"=>"2012-08-07T14:30:36Z",
        "created_date"=>{
            "day"=>7,
            "hour"=>14,
            "full"=>"2012-08-07T14:30:36Z"
        },
        "post"=>[
            "Foo",
            "Bar"
        ],
        "foo"=>"BAR!",                    # helper call already being tested
        "created_at_in_words"=>"less than a minute",  # helper just added
        "user"=>{
            # snip
        },
        "author_name"=>"billybob"
    }
}

[apneadiving]

This works for me but I don't know how to spec now.

Example where I'm using truncate in my rabl view:

Rabl.render(post, 'beta/posts/show')

Failure/Error: Rabl.render(post, 'beta/posts/show')
 NoMethodError:
   undefined method `truncate' for #<Rabl::Engine:0x007fdd911775c0>

Any idea please?

[dkharrat]

In my case, I was defining the helper in the controller using the standard def, but the method did not work in the rabl views. What fixed it for me is to use the helper_method macro:

helper_method :current_user

def current_user
   ...
end

Without the helper_method macro, the method is not accessible from the view.

[scalaview]

helper not word in rabl with rails 4, I use mater still have that problem