Question

I am struggling with this Ajax call from Rails 2:

   def add_task_link(name)
      link_to_function name do |page|
         page.insert_html :bottom, :tasks, :partial => 'task', :object => Task.new
      end
   end

How can I express this with Rails 3?

Thanks,

Answer 1

There are some hints in this project in Github: https://github.com/ryanb/complex-form-examples

   def link_to_add_fields(name, f, association)
     new_object = f.object.class.reflect_on_association(association).klass.new
     fields = f.fields_for(association, new_object, :child_index => "new_#{association}") do |builder|
         render(association.to_s.singularize + "_fields", :f => builder)
      end
      link_to_function(name, "add_fields(this, \"#{association}\", \"#{escape_javascript(fields)}\")")
    end

Additionally, it is important to use accepts_nested_attributes_for as shown in

https://github.com/ryanb/complex-form-examples/blob/master/app/models/survey.rb