Django模板if语句未返回我期望的值

Question

我想允许用户编辑自己的评论。我试图比较comment.nick以及request.user.username和request.user.get_username。例如，comment.nick返回“作者”，request.user.username将返回“作者”，但“编辑”将不可见。

{% if request.user.username == comment.nick %}
    <a href="{% url 'edit_comment' comment.id %}">Edit</a>
{% endif %}


# models.py
class Commentary(models.Model):
    nick = models.ForeignKey('Profile', on_delete=models.CASCADE, max_length=20)
    comment = models.TextField(max_length=300)
    article = models.ForeignKey(Article, on_delete=models.CASCADE)
    added = models.DateTimeField(auto_now_add=True, blank=True)