Ruby on Rails

I create the project in scaffold but I cant able to edit it and update
th values

I gort the error in no action required I attach the image bellow
and my codeing the controller is :

@department = Department.find(params[:id])

respond_to do |format|
if @department.update_attributes(params[:departments])
flash[:notice] = 'Department was successfully updated.'
format.html { redirect_to(@department) }
format.xml { head :ok }
else
format.html { render :action => "edit" }
format.xml { render :xml => @department.errors, :status =>
:unprocessable_entity }
end
end

Attachments:
http://www.ruby-forum.com/attachment/8184/edit.jpg


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