python - 模板内的 Django Cookie 值

Question

如果请求中存在某个指定的 cookie，我想在布局中显示其他链接。我已设法访问模板内的“请求”变量。我做了以下事情:

 {% if request.COOKIES.['cookie_name'] %}
   <li><a href="{% url 'felhasznalo:felhasznalo-detail' %}">some link</a></li>
 {% endif  %}

但它会抛出此错误:TemplateSyntaxError at/ 无法解析剩余部分:'request.COOKIES.['cookie_name']'中的'['cookie_name']'

我做错了什么？ (cookie存在，如果我打印出request.COOKIES，它会写出所有包含cookie的名称及其值)

Answer 1

https://docs.djangoproject.com/en/1.11/ref/templates/api/#variables-and-lookups

使用

{% if request.COOKIES.cookie_name %}
   <li><a href="{% url 'felhasznalo:felhasznalo-detail' %}">some link</a></li>
{% endif  %}

Variables and lookups

Variable names must consist of any letter (A-Z), any digit (0-9), an underscore (but they must not start with an underscore) or a dot.

Dots have a special meaning in template rendering. A dot in a variable name signifies a lookup. Specifically, when the template system encounters a dot in a variable name, it tries the following lookups, in this order:

Dictionary lookup. Example: foo["bar"]
Attribute lookup. Example: foo.bar
List-index lookup. Example: foo[bar]