如果要保持DRY，请使用包含.

if you want to stay DRY, use an include.

{% if foo %}
  {% with a as b %}
    {% include "snipet.html" %}
  {% endwith %} 
{% else %}
  {% with bar as b %}
    {% include "snipet.html" %}
  {% endwith %} 
{% endif %}

或者，甚至更好的方法是在模型上编写一个封装核心逻辑的方法:

or, even better would be to write a method on the model that encapsulates the core logic:

def Patient(models.Model):
    ....
    def get_legally_responsible_party(self):
       if self.age > 18:
          return self
       else:
          return self.parent

然后在模板中:

{% with patient.get_legally_responsible_party as p %}
  Do html stuff
{% endwith %} 

那么，将来，如果负责法律责任的逻辑发生变化，您将拥有一个更改逻辑的地方-比在十几个模板中更改if语句要干得多.

Then in the future, if the logic for who is legally responsible changes you have a single place to change the logic -- far more DRY than having to change if statements in a dozen templates.