【django 组件】admin修改界面

class Value_A(admin.ModelAdmin):

    list_display = ('name',"href_requests","href_link")
    list_filter = ['name',]

    # 定义
    def get_form(self, request, obj=None, **kwargs):

        form = super(Value_A, self).get_form(request, obj, **kwargs)


        form.base_fields['link'].widget.attrs['style'] = ' 1000px;'
        form.base_fields['name'].widget.attrs['style'] = ' 1000px;'

        form.base_fields['text'].widget.attrs['cols'] = '100'
        form.base_fields['text'].widget.attrs['rows'] = '30'
        form.base_fields['text'].widget.attrs['style'] = ' 1000px;'

        return form




    formfield_overrides = {
        models.Value_A: {'widget': Textarea(attrs={'rows': 10, 'cols': 50})},
    }

    list_per_page = 20

    actions = ["export_as_excel"]
    def export_as_excel(self, request, queryset):
        meta = self.model._meta  # 用于定义文件名, 格式为: app名.模型类名
        field_names = [field.name for field in meta.fields]  # 模型所有字段名
        response = HttpResponse(content_type='application/msexcel')  # 定义响应内容类型
        response['Content-Disposition'] = f'attachment; filename={meta}.xlsx'  # 定义响应数据格式
        wb = Workbook()  # 新建Workbook
        ws = wb.active  # 使用当前活动的Sheet表
        ws.append(field_names)  # 将模型字段名作为标题写入第一行
        for obj in queryset:  # 遍历选择的对象列表

            for field in field_names:
                data = [f'{getattr(obj, field)}' for field in field_names]  # 将模型属性值的文本格式组成列表
            ws.append(data)
        wb.save(response)
        return response

    export_as_excel.short_description = '导出Excel'  # 该动作在admin中的显示文字

admin.site.register(models.Value_A, Value_A)