* 后的 _reverse_with_prefix() 参数必须是可迭代的，而不是 int [英] _reverse_with_prefix() argument after * must be an iterable, not int

问题描述

我过去曾多次使用 Django 的 reverse，但今天遇到这个错误，这似乎不够直观，无法调试:

I have used Django's reverse multiple times in the past but getting this error today which doesn't seem intuitive enough to debug:

TypeError: _reverse_with_prefix() argument after * must be an iterable, not int

这是我使用它的视图:

from django.urls import reverse

...
...
def show_scores_url(self, obj):
    scores_url = reverse('get_scores', args=(obj.pk))
    return format_html('<a href="' + scores_url + '">Scores</a>')

...
...

推荐答案

如 这个 评论，在 args 元组末尾放一个逗号可以修复它.

As mentioned in this comment, putting a comma at the end of the args tuple fixes it.

scores_url = reverse('get_scores', args=(obj.pk,))

(如 this SO answer 中所述，单项元组需要尾随逗号以消除定义元组的歧义括号括起来的表达式)

(As mentioned in this SO answer, trailing comma is required for single-item tuples to disambiguate defining a tuple from an expression surrounded by parentheses)

或者，如 docs 中所述，使用列表会工作正常:

Alternatively, as mentioned in the docs, using a list would work fine:

scores_url = reverse('get_scores', args=[obj.pk])

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