class GoodsForm(forms.ModelForm):
    def __init__(self, *args, **kwargs):
        super(GoodsForm, self).__init__(*args, **kwargs)
        goods_obj = Goods.objects.order_by('-paixu').first()
        if goods_obj:
            self.fields['paixu'].help_text = "越大越靠前, 当前商品排序最大值为: %s" % goods_obj.paixu
        self.fields['is_show'].help_text = format_html('<p style="color: red;">请注意该选项 !</p>')

    class Meta:
        model = Goods
        exclude = ()


@admin.register(Goods)
class DianPuAdmin(admin.ModelAdmin):
    list_display = ["id", "mingcheng", "paixu", "create_time"]
    form = GoodsForm