from django import template register = template.Library() 定义一个自定义模板标签或过滤器函数,用于重置forloop计数器。可以使用一个变量来保存当前的计数器值,并在嵌套的for循环中将其重置为1。示例代码如下: 代码语言:txt 复制 @register.filter def reset_counter(counter):
可以利用{%forobjinlistreversed%}反向完成循环。 注:循环序号可以通过{{forloop}}显示 forloop.counter The current iteration of the loop (1-indexed) forloop.counter0 The current iteration of the loop (0-indexed) forloop.revcounter The number of iterationsfromthe end of the loop (1-indexed) fo...
{%foriteminlist %} ... {%empty%} ... {% endfor %} 使用forloop.counter访问循环的次数,下面这段代码依次输出循环的次数,从1开始计数: {%foriteminlist %} ... {{forloop.counter}} ... {% endfor %} 从0开始计数: {%foriteminlist %} ... {{forloop.counter0}} ... {% endfor %...
下面的配置是默认的 vue-admin 配置。"OPTIONS":{"context_processors":["django.template.context_proce...
emptyfor 标签带有一个可选的{% empty %} 从句,以便在给出的组是空的或者没有被找到时,可以有所操作。 {% for person in person_list %} {{ person.name }} {% empty %} sorry,no person here {% endfor %} 2.2 {{forloop}} forloop.counter 表示的是循环的次数,而这个整数是从1开始计算的,...
2、for...empty :for 标签带有一个可选的{% empty %} 从句,以便在给出的组是空的或者没有被找到时,可以有所操作。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 {%forpersoninperson_list%}{{person.name}}{%empty%}sorry,no person here{%endfor%} 3、if标签 :{% if %...
Django has a built in template tag, {% empty %}, placed within the for loop. If the for loop does not have any objects in it, then the code within the {% empty %} template tag is run. So, to show an actual example, look at the following code below. ...
Templates engines are configured with theTEMPLATESsetting. It’s a list of configurations, one for each engine. The default value is empty. Thesettings.pygenerated by thestartprojectcommand defines a more useful value: TEMPLATES=[{"BACKEND":"django.template.backends.django.DjangoTemplates","DIRS":...
Templates engines are configured with theTEMPLATESsetting. It’s a list of configurations, one for each engine. The default value is empty. Thesettings.pygenerated by thestartprojectcommand defines a more useful value: TEMPLATES=[{'BACKEND':'django.template.backends.django.DjangoTemplates','DIRS':...
{# {% if forloop.first %} {# forloop.first 结果返回布尔值 #} {#第1个元素不为False,它是:{{ s }}#} {# {% endif %}#} {#第{{ forloop.counter }}个元素是:{{ s }}#} {% empty %}第{{ forloop.counter }}个元素为空{% endfor %} 1. 2. 3. 4. 5. 6. 7. ...