I trying to use render method inside my activeAdmin form method, but after insert render in code, it stopped to work.

form do |f| f.inputs I18n.t('sale_header') do f.input :client f.input :room end

f.inputs I18n.t('sale_items')  do
  render :partial => "form_sale"
end

f.inputs I18n.t('totalization') do
  f.input :sub_total, :input_html => { :disabled => :true }
  f.input :discount
  f.input :total_value, :input_html => { :disabled => :true }
end

f.buttons

end

After insert the render method, only form_sale content is showed on screen.

Any help? Thank You!