Rails 3: How to render ERb template in rake task?

Question

I am rendering a pretty huge sitemap HTML file with rake. Unfortunately, the code breaks when I migrate to rails 3. My current code looks like this:

@control         


        

Answer 1

This is what worked for me:

html = render_to_string(:index, layout: nil)

Answer 2

One of the approaches works when I include Rails.application.routes.url_helpers instead of ActionView::Helpers::UrlHelper. This works for now:

include Rails.application.routes.url_helpers # brings ActionDispatch::Routing::UrlFor
include ActionView::Helpers::TagHelper

av = ActionView::Base.new(Rails.root.join('app', 'views'))
av.assign({
  :regions => @regions,
  :courts_by_region => @courts_by_region,
  :cities_by_region => @cities_by_region,
  :districts_by_region => @districts_by_region
})
f = File.new(file_name, 'w')
f.puts(av.render(:template => "sitemap/index.html"))
f.close

Hope this helps others. If there is a better solution, I'd be interested.

Also, how do I automatically get a hash of assigns from binding?

Answer 3

This is what worked for me (Rails 3):

class TaskActionView < ActionView::Base
  include Rails.application.routes.url_helpers
  include ApplicationHelper

  def default_url_options
     {host: 'example.com'}
  end
end

def action_view
  controller = ActionController::Base.new
  controller.request = ActionDispatch::TestRequest.new
  TaskActionView.new(Rails.root.join('app', 'views'), {}, controller)
end

action_view.render(:template =>"path/to/template")

This successfully included my application helper, tag helpers, and url helpers. You'll want to put your application/environments host properly into the default_url_options hash.

Answer 4

I was successfull by doing something like this:

class Template < ActionView::Base
  include Rails.application.routes.url_helpers
  include ActionView::Helpers::TagHelper

  def default_url_options
    {host: 'yourhost.org'}
  end
end  

template = Template.new(Rails.root.join('app', 'views'))
template.assign(attendee: @attendee)
template.render(template: 'sitemap/index.html.erb')