json erb template cannot find other html partial

Question

I am trying to have a json response in which some value is html rendered by a partial

#projects_Controller.rb

def index
  respond_to do |f|
    f.json 
  en         


        

Answer 1

Got it: All one needs is this line in the .json.erb file <% self.formats = ["html"] %>

So the full index.json.erb

      <% self.formats = ["html"] %>
      disclaimer = {
        "html":"<%= raw escape_javascript(render :partial => 'projects/disclaimer',
                    :content_type => 'text/html'), 
                    :locals => {:localVariable => @localVariable} 
                %>"
      }

Answer 2

My answer is similar to Nik's above. I have the following helper for json.erb templates:

# helpers useful for json.erb templates
module JsonHelper

  # Same as render but force actionview to look for html templates instead of json.
  def render_html(options={}, locals={}, &block)
    old_formats = formats
    self.formats = [:html] # hack so partials resolve with html not json format
    render options, locals, &block  

  ensure
    self.formats = old_formats 
  end 

  # json escape a string. For example <%=json "some { string }" %>
  def json(value)
    raw value.to_json
  end 
end

So now I can write templates like

{
  "html": <%=json render_html(:partial => 'some_partial') %>,
  "status": success
}

This would be nicer if actionview allowed rendering with a content_type like in 23tux's example (which doesn't work for me). It would also be nicer if only *.html.erb underwent html escaping instead of all *.erb files.

Answer 3

For future readers, you may pass on formats parameter like this.

= render partial: 'user', locals: {xyz: @xyz}, :formats => [:html]

Answer 4

I'm not sure if I got you right, but maybe you can play with the content type like this:

disclaimer = {
  "html":"<%= raw escape_javascript(render :partial => 'projects/disclaimer', :content_type => 'text/html'), :locals => {:localVariable => @localVariable} %>"
}

The :locals is just if you want to pass an var to the partial.