单个帖子类别的重定向错误

时间:2018-11-11 11:02:14

标签: django django-models django-views django-urls django-2.1

我正在开发自己的个人博客;它只有两个类别,我想为这两个类别提供特定的帖子列表。

因此,我将展开 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})

在下面您可以看到 views.py ;它根据类别具有不同的模型:

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类别的单个帖子时,就会显示相对详细信息,而不会出现问题。但是,当我单击其他类别的帖子时,会显示以下内容:

  

找不到页面(404)请求方法:GET请求URL:     http://127.0.0.1:8000/gis/erova-mobilita/提出者:     blog.views.GisSinglePost

     

找不到与查询匹配的Articolo

     

您看到此错误,因为您的Django中的DEBUG = True   设置文件。将其更改为False,Django将显示一个   标准404页面。

我已经在这个问题上困扰了很多天。 我该如何解决

2 个答案:

答案 0 :(得分:2)

您应该重新定义get_absolute_url方法。由于您的类别为G.I.S的Blog实例存在,因此对于类别为Sustainable Mobility的Blog实例,您再也不会排名第二。

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})

答案 1 :(得分:1)

尝试通过以下方式重新定义您的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})