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模板过滤器 - add


示例

将所有价格增加 10 美元

{% for x in prices %}
  <h1>The price is {{ x|add:"10" }} dollars.</h1>
{% endfor %}
运行示例 »

定义和用法

The add 过滤器将指定的参数添加到值中。

The add 过滤器尝试将值转换为数字并返回总和,但如果无法将值转换为数字,则将在末尾添加指定的参数

示例

在每种水果的末尾添加短语“-CHECK”

{% for x in fruits %}
  <h1>{{ x|add:"-CHECK" }}</h1>
{% endfor %}
运行示例 »

您还可以将一个列表添加到另一个列表中

示例

fruits 列表的末尾添加 vegetables 列表

{{ fruits|add:vegetables }}
运行示例 »

注意:如果 Django 无法将值转换为相同的数据类型,它将返回一个空字符串。


语法

{{ value|add:valuetoadd }}

模板过滤器通过使用管道 | 字符后跟过滤器的名称来定义。

参数通过使用冒号 : 字符后跟参数值来定义。


参数

描述
valuetoadd 必需。要添加到原始值的值。如果两个值都可以转换为数字,则返回总和,否则将在原始值的末尾添加添加的值。

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