python - Django 模板语法错误

Question

当我运行我的 django 服务器时它显示错误但我找不到它。它显示模板语法错误

Unclosed tag on line 2: 'if'. Looking for one of: elif, else, endif.
Request Method: GET
Request URL:    http://127.0.0.1:8000/tag/django/
Django Version: 2.0.5
Exception Type: TemplateSyntaxError
Exception Value:    
Unclosed tag on line 2: 'if'. Looking for one of: elif, else, endif.
Exception Location: C:\Users\user\Anaconda3\envs\amirdjango\lib\site-packages\django\template\base.py in unclosed_block_tag, line 549
    Python Executable:  C:\Users\user\Anaconda3\envs\amirdjango\python.exe
    Python Version: 3.6.5
    Python Path:    
    ['H:\\Amir\\Django\\myDjangostuff\\suorganizer',
     'C:\\Users\\user\\Anaconda3\\envs\\amirdjango\\python36.zip',
     'C:\\Users\\user\\Anaconda3\\envs\\amirdjango\\DLLs',
     'C:\\Users\\user\\Anaconda3\\envs\\amirdjango\\lib',
     'C:\\Users\\user\\Anaconda3\\envs\\amirdjango',
     'C:\\Users\\user\\Anaconda3\\envs\\amirdjango\\lib\\site-packages']
    Server time:    Tue, 28 Aug 2018 15:59:01 +0000

    -Error: Unclosed tag on line 2: 'if'. Looking for one of: elif, else, endif.

django 模板在这里:-

         <h2> {{ tag.name|title }} </h2>
         {% if tag.startup_set.all %}
         <section>
         <h3>Startup {{ tag.startup_set.count|pluralize }}</h3>
         <p>
         Tag is associated with
         {{ tag.startup_set.count }}
         startup {{ tag.startup_set.count|pluralize }}
        </p>
         <ul>
         { % for startup in tag.startup_set.all % }
         <li><a href="">
         { { startup.name } }
         </a></li>
         { % endfor % }
         </ul>
         </section>
         { % endif % }
         { % if tag.blog_posts.all % }
         <section>
         <h3>Blog Post { { tag.blog_posts.count|pluralize } } </h3>
         <ul>
         { % for post in tag.blog_posts.all % }
         <li><a href="">
         { { post.title|title } }
         </a></li>
         { % endfor % }
         </ul>
         </section>
         { % endif % }
         { % if not tag.startup_set.all and not tag.blog_posts.all % }
         <p>This tag is not related to any content.</p>
         { % endif % }

Answer 1

Django 标签被 {% 和 %} 包围(变量带有 {{ 和 }} 但是让我们暂时忽略它)。

但在您的代码中，除了第一个 {% if ... %} 语句外，您始终这样写:

<s>{ %</s> endif <s>% }</s>

注意 { 和 % 之间的空格，Django 不会将其解析为 Django 标签。因此，您应该删除空格，使标签显示为:

<b>{%</b>  endif  <b>%}</b>

因此您应该将标签固定为:

<h2> {{ tag.name|title }} </h2>
 {% if tag.startup_set.all %}
 <section>
 <h3>Startup {{ tag.startup_set.count|pluralize }}</h3>
 <p>
 Tag is associated with
 {{ tag.startup_set.count }}
 startup {{ tag.startup_set.count|pluralize }}
</p>
 <ul>
 <b>{% for startup in tag.startup_set.all %}</b>
 <li><a href="">
 { { startup.name } }
 </a></li>
 <b>{% endfor %}</b>
 </ul>
 </section>
 <b>{% endif %}</b>
 <b>{% if tag.blog_posts.all %}</b>
 <section>
 <h3>Blog Post { { tag.blog_posts.count|pluralize } } </h3>
 <ul>
 <b>{% for post in tag.blog_posts.all %}</b>
 <li><a href="">
 { { post.title|title } }
 </a></li>
 <b>{% endfor %}</b>
 </ul>
 </section>
 <b>{% endif %}</b>
 <b>{% if not tag.startup_set.all and not tag.blog_posts.all %}</b>
 <p>This tag is not related to any content.</p>
 <b>{% endif %}</b>

我还建议避免将查询(和其他业务逻辑)写入模板。通常这更多是 View 的任务。