我正试图测试我的一个应用程序的模型。Book
该 slug
字段。我有一个自定义的保存函数,像下面这样。
模型.py
class Book(models.Model):
title = models.CharField(max_length=50)
slug = models.SlugField(max_length=50, unique=True)
def save(self, *args, **kwargs):
if not self.slug:
slug = slugify(self.title, allow_unicode=True)
return super(Book, self).save(*args, **kwargs)
为了测试这个,我创建了下面的 test.py
class BookModelTests(TestCase):
@classmethod
def setUpTestData(cls):
Book.objects.create(title="Book One")
def test_get_absolute_url(self):
book = Book.objects.get(pk=1)
self.assertEquals(book.get_absolute_url(), '/books/book-one/')
但当我运行测试时,它失败的原因是 django.urls.exceptions.NoReverseMatch: Reverse for 'book-detail' with arguments '('',)' not found. 1 pattern(s) tried: ['books/(?P<book_slug>[-a-zA-Z0-9_]+)/$'].
回溯
Traceback (most recent call last):
File "Bookman/bookman/bms/tests/test_models.py", line 14, in test_get_absolute_url
self.assertEquals(book.get_absolute_url(), '/books/book-one/')
File "Bookman/bookman/bms/models.py", line 26, in get_absolute_url
return reverse('book-detail', args=[str(self.slug)])
File "Bookman/venv/lib/python3.8/site-packages/django/urls/base.py", line 87, in reverse
return iri_to_uri(resolver._reverse_with_prefix(view, prefix, *args, **kwargs))
File "Bookman/venv/lib/python3.8/site-packages/django/urls/resolvers.py", line 677, in _reverse_with_prefix
raise NoReverseMatch(msg)
django.urls.exceptions.NoReverseMatch: Reverse for 'book-detail' with arguments '('',)' not found. 1 pattern(s) tried: ['books/(?P<book_slug>[-a-zA-Z0-9_]+)/$']
为什么是 slug
空?为什么是 save
方法没有被调用?我遗漏了什么?
在你的无意中的错误 save
方法。你应该使用 self.slug
来给对象的slug赋值,比如。
def save(self, *args, **kwargs):
if not self.slug:
self.slug = slugify(self.title, allow_unicode=True)
return super(Book, self).save(*args, **kwargs)