Content within form_for tags not being executed in rails 3.2 partial that is rendered using ajax -

update:solved simple error of not putting equals sign after % sign! hi folks have partial being rendered correctly not displayed on web page @ all. here partial 'exam/_exam_marks_form':

<% form_for ([@batch, @exam_group]), :remote=> true |f| %> <h1>render me</h1> <%end%> 

from log info, partial being rendered correctly:

rendered exam/_exam_marks_form.erb (3.2ms) rendered exam/update_exam_form.js.erb (4.9ms) completed 200 ok in 175ms (views: 9.5ms | activerecord: 3.8ms) 

the problem contents of partial not being displayed or executed. have noticed enclosed in form_for tags not being executed.raw html working fine. missing? routes follows:

resources :batches resources :exam_groups resources :additional_exam_groups resources :elective_groups  end resources :exam_groups resources :exams   member     post :save_scores   end end 

end

the partial meant rendered in page under id 'exam_form':

   <div class="row">     <div class="span6 offset3">    <%= form_for :exam_option,:remote=> true, :url => { :controller=>'exam',:action =>  'update_exam_form',:batch=>@batch} |form| %>  <%= form.submit "save", class: "btn btn-large btn-primary" %>      <%end%><%end%>   <div id="exam-form"></div>    </div></div> 

the relevant update_exam_form.js.erb file shown:

$("#exam-form").html("<%= escape_javascript(render('exam/exam_marks_form')) %>") 

i think problem form_for somewhow not being recognized because raw html working fine. appreciated :)