单个 post 类别的重定向不正确

Question

我正在开发我的个人博客；它只有两个类别，我想为这两个类别提供一个特定的 post 列表。

出于这个原因，我展开了 get_absolute_url，如下所示：

from django.db import models
from django.urls import reverse

CATEGORY_CHOICES = (
    ('G.I.S.', 'G.I.S.'),
    ('Sustainable Mobility', 'Sustainable Mobility'),
)

class Blog(models.Model):
    """
    Blog's post definition
    """
    title = models.CharField(
                max_length=70,
                unique=True,
                )
    slug = models.SlugField(
            unique=True,
            )
    contents = models.TextField()
    publishing_date = models.DateTimeField()
    category = models.CharField(
                    max_length=50,
                    choices=CATEGORY_CHOICES,
                    )

    def __str__(self):
        return self.title

    def get_absolute_url(self):
        if Blog.objects.filter(category="G.I.S."):
            return reverse("gis_single_post", kwargs={"slug": self.slug})
        if Blog.objects.filter(category="Sustainable Mobility"):
            return reverse("sumo_single_post", kwargs={"slug": self.slug})

下面可以看到views.py；它具有基于类别的不同模型：

from django.shortcuts import render
from django.views.generic.list import ListView
from django.views.generic.detail import DetailView

from .models import Blog


class GisSinglePost(DetailView):
    model = Blog
    queryset = Blog.objects.filter(category="G.I.S.")
    context_object_name = 'post'
    template_name = "gis_single_post.html"


class GisListPost(ListView):
    model = Blog
    queryset = Blog.objects.filter(category="G.I.S.")
    context_object_name = 'posts'
    template_name = "gis_list_post.html"


class SuMoSinglePost(DetailView):
    model = Blog
    queryset = Blog.objects.filter(category="Sustainable Mobility")
    context_object_name = 'post'
    template_name = "sumo_single_post.html"


class SuMoListPost(ListView):
    model = Blog
    queryset = Blog.objects.filter(category="Sustainable Mobility")
    context_object_name = 'posts'
    template_name = "sumo_list_post.html"

下面是urls.py及其四个路径：

from django.urls import include, path
from .views import GisSinglePost, GisListPost, SuMoListPost, SuMoSinglePost

urlpatterns = [
        path("gis/", GisListPost.as_view(), name="gis_list_post"),
        path("gis/<slug:slug>/", GisSinglePost.as_view(), name="gis_single_post"),
        path("sustainable-mobility/", SuMoListPost.as_view(), name="sumo_list_post"),
        path("sustainable-mobility/<slug:slug>/", SuMoSinglePost.as_view(), name="sumo_single_post"),
]

当我单击 GIS 类别的单个 post 时，它会毫无问题地显示相关详细信息。但是当我点击另一个类别的 post 时，它会向我显示：

Page not found (404) Request Method: GET Request URL: http://127.0.0.1:8000/gis/erova-mobilita/ Raised by: blog.views.GisSinglePost

No Articolo found matching the query

You're seeing this error because you have DEBUG = True in your Django settings file. Change that to False, and Django will display a standard 404 page.

这个问题困扰我好几天了。 我该如何解决?

Answer 1

您应该重新定义您的 get_absolute_url 方法。由于类别为 G.I.S 的博客实例存在，如果类别为可持续移动的博客实例，您永远不会达到第二。

def get_absolute_url(self):
    if self.category == "G.I.S.":
        return reverse("gis_single_post", kwargs={"slug": self.slug})
    elif self.category == "Sustainable Mobility":
       return reverse("sumo_single_post", kwargs={"slug": self.slug})

Answer 2

尝试用下一种方式重新定义您的 get_absolute_url(self)：

def get_absolute_url(self):
    if self.category == "G.I.S.":
        return reverse("gis_single_post", kwargs={"slug": self.slug})
    if self.category == "Sustainable Mobility":
        return reverse("sumo_single_post", kwargs={"slug": self.slug})

单个 post 类别的重定向不正确

Incorrect redirection for a single post category

django

django-models

django-urls

django-views

django-2.1