Django模板标签有条件

Question

如何使条件语句脱离Django模板标签？

from django import template 
from django.contrib.auth.models import User, Group 

register = template.Library() 

@register.simple_tag 
def is_designer(user_id): 
    try: 
     group = Group.objects.get(
      name = "Designer", 
      user = user_id 
     ) 
     return True 
    except Group.DoesNotExist: 
     return False 

这出现在我的模板，这是正确的真或假：

{% is_designer user.id %} 

然而，这些给我一个错误“未使用‘user.id’在if语句的结束”：

{％如果is_designer user.id ==真％}是{％ENDIF％}

{％如果is_desig NER user.id％}是{％ENDIF％}

Answer 1

如果您作出为assignment tag，你可以不喜欢

{% is_designer user.id as is_user_designer %} 

{% if is_user_designer == True %} Yes {% endif %} 

{% if is_user_designer %} Yes {% endif %} 

Answer 2

这个怎么样：

{% is_designer user.id as is_user_designer %} 
{{ is_user_designer|yesno:"Yes," }}