Question

I am using Ruby on Rails 3.0.10 and I would like to pass some parameters to the default rendering method. That is, if I have a code like

def show
  ...

  respond_to do |format|
    format.html # This, by default, renders the 'show.html.erb' file
   end
end

I would like to pass some parameters, maybe like (note: the following doesn’t work)

def show
  ...

  respond_to do |format|
    # Here I would like to add some local objects that will be available in the 'show.html.erb' template file
    format.html { render ..., :locals => { :content => { :value => 'Sample value' } } }
   end
end

so that in the show.html.erb template I can make something like:

<%=
  content[:value]
  # => 'Sample value'
%>

In few words, I would like to pass parameter values in the same way as made for partial template rendering related to the :locals key:

render :partial, 
       :locals => {
          :content => { :value => 'Sample value' }
       }

How can I do that?

Answer 1

You can do exactly what you described. I looked it up here http://apidock.com/rails/ActionController/Base/render under the heading “Rendering a template” and gave it a whirl myself. You learn something new everyday.

You can simply do

def show
  respond_to do |format|
    format.html { render :locals => { :content => { :value => 'Sample value' } } }
  end
end

I would consider why you need to do this instead of using instance variables. Maybe there is a better approach.