*之后的_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

我过去多次使用Django的 reverse ，但今天却收到此错误，似乎调试起来还不够直观：

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

如此注释，在args元组的末尾添加了一个逗号来解决该问题。

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 SO答案，单项元组必须使用逗号逗号来消除定义元组或括号中的表达式的歧义）

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

或者，如文档，使用列表可以正常工作：

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

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

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