Django Rest Framework：带有多个 slug 的 url

Question

我正在为我的博客开发 API。每一篇文章都对应一个分类，那么一篇文章的url就是这样："<slug:slug_category>/<slug:slug_post>/"。现在我的博客运行没有 API 并且以前的路径工作正常。

我需要与 API 具有相同的路径，然后我创建了这个 api 视图：

@api_view(["GET"])
def blogPost_details_apiview(request, slug_post, slug_category):
    try:
        object = BlogPost.objects.get(slug_post=slug_post, slug_category=slug_category) 
    except BlogPost.DoesNotExist:
        return Response({"Error": {
            "code": 404,
            "message": "Article not found!"
        }},
        status=status.HTTP_404_NOT_FOUND)

    if request.method == "GET":
        serializer = BlogPostListSerializer(object)
        return Response(serializer.data)

这是 urls.py 中的代码：path('<slug:slug_category>/<slug:slug_post>/', views.blogPost_details_apiview, name="details-blogpost"),

我看到这个错误：

FieldError at /api/blog/gis/corso-applicativo-di-base-sistemi-informativi-territoriali/ Cannot resolve keyword 'slug_category' into field. Choices are: attachment, attachment_id, category, category_id, contents, description, draft, header_image, highlighted, id, publishing_date, slug_post, tags, timestamp, title, updating_date

我错了什么？我正在使用 Django 2.2

编辑： models.py

class CategoryBase(models.Manager):
    category_name = models.CharField(max_length=50unique=True)
    slug_category = models.SlugField(unique=True)

    def get_absolute_url(self):  
        return reverse("single_blogcategory", kwargs={"slug_category": self.slug_category})

class BlogPost(models.Manager):
    title = models.CharField(max_length=70, unique=True)
    slug_post = models.SlugField(max_length=70, unique=True)
    header_image = models.CharField(max_length=1000, null=True, blank=True)
    description = models.TextField(max_length=200, blank=True)
    contents = models.TextField()
    draft = models.BooleanField(default=False)    
    highlighted = models.BooleanField(default=False)
    category = models.ForeignKey(BlogCategory,on_delete=models.CASCADE, related_name="related_blogcategory")
    tags = models.ManyToManyField(BlogTag,related_name="related_blogtag", verbose_name="Tag")     
    attachment = models.ForeignKey(FileUpload, on_delete=models.CASCADE, related_name="related_attachment", null=True, blank=True)
    publishing_date = models.DateTimeField(default=timezone.now)
    updating_date = models.DateTimeField(auto_now=True)
    timestamp = models.DateTimeField(auto_now=False, auto_now_add=True)

    def get_absolute_url(self):
        return reverse("single_blogpost", kwargs={
                                                "slug_post": self.slug_post,
                                                "slug_category": self.category.slug_category,
                                                })

Answer 1

根据发布的模型，slug_category 不在 BlogPost 上，而是在 Category 上。请将您的代码更改为：

object = BlogPost.objects.get(
    slug_post=slug_post,
    category__slug_category=slug_category,
)

请注意，在第二行中，我们在通过外键连接的 category 字段上查找 slug_category。

Django Rest Framework：带有多个 slug 的 url

Django Rest Framework: urls with multiple slugs

django

django-rest-framework

django-views

django-urls