Ajax rendering partial ( fields in form)

rubyonrails-talk
1

when rendering a piece of my form after an Ajax call, I get the error

ActionView::Template::Error (undefined local variable or method `f' for #<#<Class:....

controller   def change_price     new_price = ....     @tax_amount = new_price * I18n.t(:standard_tax_rate)     render 'backoffice/projects/change_price.js'   end

change_tax.js.erb .... $('#project_tax').html( '<%= escape_javascript(render :partial => "backoffice/projects/project_tax", :locals => {:f => f}) %>');

and in my partial view

= f.text_field :tax_amount, :readonly => true, :precision => 2, :delimiter => ".", :value => @tax_amount

is there a way to do it , or should I use simple text_field tag in the partial ?

thanks for feedback