python之该页码小于 1 Django

我已经阅读了几乎所有与类似错误消息相关的线程，但没有一个提供了解决我的问题的方法。 我是一个故事，每个故事都有章节。我的想法是每页会有一个章节，但当我尝试分页时，我不断收到相同的错误消息“EmptyPage at/story/1/page/1/”。

每个故事都有多个章节，但页码仍然小于 1。

views.py

def post(request, id_story, page=1): 
    story = Story.objects.get(id=id_story) 
    chapters = story.chapter_set.all() 
    paginator = Paginator(chapters, 1) 
    try: 
        chapters = paginator.page(page) 
    except PageNotAnInteger: 
        chapters = paginator.page(1) 
    except EmptyPage: 
        chapters = paginator.page(paginator.num_pages) 
    return render(request, 'single.html', {'story': story, 'chapters': chapters}) 

模型.py

class Story(models.Model): 
    Lang =( 
        ('LA', '-LANGUAGE-'), 
        ('Ar', 'ARABIC'), 
        ('Ot', 'OTHER') 
    ) 
    title = models.CharField(max_length=250, null=False) 
    author = models.ForeignKey(User, on_delete=models.CASCADE) 
    summary = models.TextField(max_length=1000, null= False) 
    pub_date = models.DateField(auto_now_add=True, blank=False, null=False) 
    update_time = models.DateField(null=True) 
    has_chapter = models.BooleanField(default=False, editable=False) 
    lang = models.CharField(choices=Lang, default=Lang[0], max_length=3) 
    story_cover = models.FileField() 
 
    def __str__(self): 
        return self.title + " - " + self.author.username 
 
 
class Chapter(models.Model): 
    story = models.ForeignKey(Story, on_delete=models.CASCADE) 
    chapter_number = models.IntegerField(editable=False, default=1) 
    title = models.CharField(max_length=250, null=True) 
    chapter = models.TextField() 
 
    def save(self, *args, **kwargs): 
        number = Chapter.objects.filter(story=self.story).count() 
        self.chapter_number = number + 1 
        story = self.story 
        if not story.has_chapter: 
            story.has_chapter = True 
            story.save() 
        super(Chapter, self).save(*args,**kwargs) 

urls.py

url(r'^story/(?P<id_story>[0-9]+)/page/(?P<page>[0-9]+)/$', views.post, name="post"), 

最后是模板

<span class="image featured"><img src="{% static 'images/yogo.jpg'%}" alt=""/></span> 
         {% for chapter in chapters %} 
                 {% autoescape off%} 
                                <h6>{{chapter.title}}</h6> 
                               {{chapter.chapter}} 
                                {% endautoescape %} 
                    {% endfor %} 
        <footer> 
            <ul class="stats"> 
                <li><a href="#" class="icon fa-heart">28</a></li> 
                <li><a href="#" class="icon fa-comment">128</a></li> 
            </ul> 
        </footer> 
         {% if chapters.has_other_pages %} 
        <ul class="actions pagination"> 
            {% if chapters.has_previous %} 
            <li><a href="?page={{ chapters.previous_page_number }}" class=" button big previous">Previous Page</a></li> 
            {% else %} 
            <li><a href="?page={{ chapters.previous_page_number }}" class="disabled button big previous">Previous Page</a></li> 
            {%endif%} 
            {% if chapters.has_next %} 
            <li><a href="?page={{ chapters.next_page_number }}" class="button big next">Next Page</a></li> 
            {%else%} 
            <li><a href="?page={{ chapters.next_page_number }}" class="button big next">Next Page</a></li> 
            {%endif%} 
 
        </ul> 
         {%endif%} 

请您参考如下方法:

您面临的问题在于您在分页中执行的两个 {%else%}。

       {% if chapters.has_previous %} 
            <li><a href="?page={{ chapters.previous_page_number }}" class=" button big previous">Previous Page</a></li> 
      {% else %} 
            <li><a href="?page={{ chapters.previous_page_number }}" class="disabled button big previous">Previous Page</a></li> 
      {%endif%} 
      {% if chapters.has_next %} 
            <li><a href="?page={{ chapters.next_page_number }}" class="button big next">Next Page</a></li> 
      {%else%} 
            <li><a href="?page={{ chapters.next_page_number }}" class="button big next">Next Page</a></li> 
      {%endif%} 

当 django 尝试呈现您的页面并且它是 page = 1 到达第一个 else 语句时，它会发现页面将是 0，这是不正确的，当下一条指令在 else 处没有下一页时，情况也是如此。 作为解决方案，它应该是这样的:

 {% if chapters.has_previous %} 
            <li><a href="?page={{ chapters.previous_page_number }}" class=" button big previous">Previous Page</a></li> 
      {% else %} 
            <li><a href="#" class="disabled button big previous">Previous Page</a></li> 
      {%endif%} 
      {% if chapters.has_next %} 
            <li><a href="?page={{ chapters.next_page_number }}" class="button big next">Next Page</a></li> 
      {%else%} 
            <li><a href="#" class="button big next">Next Page</a></li> 
      {%endif%}