python 在 Django 模板中增加一个变量
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increment a variable in django templates
提问by Hulk
All,
全部，
How Can we increment a value like the following in django templates,
我们如何在 Django 模板中增加如下所示的值，
{{ flag =0 }}
{% for op in options %}
{{op.choices}}<input type="radio" name="template" id="template" value="template{{flag++}}"/>
{% endfor %}
thanks..
谢谢..
回答by mojbro
I don't think it's intended you should alter data in your templates. For in your specific case, you could instead use the forloop.countervariable.
我不认为您应该更改模板中的数据。对于您的特定情况，您可以改为使用forloop.counter变量。
For example:
例如：
{% for op in options %}
{{op.choices}}<input type="radio" name="template" id="template{{forloop.counter}}" value="template{{forloop.counter}}"/>
{% endfor %}
Also note that I added that number to the idattributes of the <input />tag. Otherwise you'll have multiple inputs with the same id.
另请注意，我将该数字添加到标签的id属性中<input />。否则，您将有多个具有相同 ID 的输入。
EDIT: I didn't note that it was a radio input. You could of course have the same name for each <input type="radio" />.
编辑：我没有注意到这是一个无线电输入。您当然可以为每个<input type="radio" />.
回答by Daniel Roseman
You explicitly can't do that in a template. Variable assignment is not allowed.
您明确不能在模板中执行此操作。不允许变量赋值。
However if all you want is a counter in your loop, you just need to use {{ forloop.counter }}.
但是，如果您只想要循环中的计数器，则只需使用{{ forloop.counter }}.
