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。

我有一个接收对象的模板标签：

{% score_for_object OBJECT_HERE as score2 %}

问题是我将来自原始选择的上下文传递给模板：

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

为了解决模板标签接受Django对象的问题，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，我希望它可以工作：

{% 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。是否可以从模板标签中检索对象？

最好的问候，

Answer 1

要获得分数：

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 %}