Django - 如何从自定义模板标签中检索对象？

Question

我没有解决这个问题的线索。

我已经接收的对象的模板标签：

{% score_for_object OBJECT_HERE as score2 %} 

的问题是，我传递给模板从原料进来一个上下文菜单中选择：

cursor = connection.cursor() 
cursor.execute("select ...") 
comments = utils.dictfetchall(cursor) 

要解决接受Django对象的模板标签的问题，我写了一个模板标签：

''' 
This template tag is used to transform a comment_id in an object to use in the django-voting app 
''' 
def retrive_comment_object(comment_id): 
    from myapp.apps.comments.models import MPTTComment 
    return MPTTComment.objects.get(id=comment_id) 

有了这个模板标签我预计这个工作：

{% for item in comments %} 
    {% score_for_object item.comment_id|retrieve_comment_object as score2 %} 

    {{ score2.score }} {# expected to work, but not working #} 
{% endfor %} 

我的问题。有可能从模板标签中检索一个对象？

最好的问候，

Answer 1

要获得得分：

from django import template 
from myapp.apps.comments.models import MPTTComment 

register = template.Library() 

@register.simple_tag 
def retrive_comment_object(comment_id): 
    data = MPTTComment.objects.get(id=comment_id) 
    return data.score 


{% for item in comments %} 
    Score: {% retrive_comment_object item.comment_id %} 
{% endfor %}