gistfile1.rbx

 def update
  @instructor = Instructor.find(params[:id])
    
    respond_to do |format|
      if @instructor.update_attributes(params[:instructor][course])
        flash[:notice] = 'Instructor was successfully updated.'
        format.html { redirect_to(@instructor) }
        format.xml  { head :ok }
      else
        format.html { render :action => "edit" }
        format.xml  { render :xml => @instructor.errors, :status => :unprocessable_entity }
      end
    end
  end