如何在 python 中解决这个分页器问题答案

【问题标题】：How can I fix this paginator problem in python如何在 python 中解决这个分页器问题
【发布时间】：2020-08-16 14:40:31
【问题描述】：

在我看来，我将分页功能定义为每页仅显示 2 个帖子，但问题是每次我添加新帖子时，底部的分页都会发生变化，但它仍然显示所有帖子而不是两个，我'将分享我的代码，以便您检查我是否犯了任何错误。

views.py

def StockView(request, sym, ):
    stock_posts = Post.objects.filter(stock__symbol=sym)
    stock_sym = get_object_or_404(StockNames,symbol = sym)
    post_list = Post.objects.filter(stock__symbol=sym)
    paginator = Paginator(post_list, 2)
    page = request.GET.get('page')

    try:
        posts = paginator.page(page)
    except PageNotAnInteger:
        posts = paginator.page(1)
    except EmptyPage:
        posts = paginator.page(paginator.num_pages)

    return render(request, 'app1/stockview.html', {'page':page,'posts':posts,'stocks':stock_posts, 'stock_sym':stock_sym, 'sym':sym })

models.py

class StockNames(models.Model):
    name = models.CharField(max_length=255)
    symbol = models.CharField(max_length=255)

    def __str__(self):
        return self.symbol

        
    

class Post(models.Model):
    title = models.CharField(max_length= 255)
    header_image = models.ImageField(null = True, blank = True, upload_to = 'images/')
    author = models.ForeignKey(User, on_delete=models.CASCADE)
    body = RichTextField(blank = True, null = True)
    #body = models.TextField()
    post_date = models.DateField(auto_now_add=True)
    category = models.CharField(max_length=255, default='coding')
    snippet = models.CharField(max_length=255)
    likes = models.ManyToManyField(User, related_name = 'blog_posts')
    stock = models.ForeignKey(StockNames, null=True, on_delete = models.CASCADE)

    def total_likes(self):
        return self.likes.count()

    def __str__(self):
        return self.title + ' | ' + str(self.author)
    
    def get_absolute_url(self):
        return reverse('app1:article-detail', args=(self.id,))

urls.py

app_name = 'app1'

urlpatterns = [
    path('add_post/<str:sym>',AddPostView.as_view(), name='addpost'),
    path('stock/<str:sym>/', views.StockView, name = 'stock'),
]

分页.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <nav aria-label="Page navigation example">
        <ul class="pagination" >
            <li class="page-item" >
                {% if page.has_previous %}
                <a class="page-link" href="?page={{page.previous_page_number}}">Previous</a>
                

                {% endif %}
                
            </li>
            <li class="page-item">
                <a class="page-link" href="">Page {{page.number}} of {{page.paginator.num_pages}}</a>
            </li>
            <li class="page-item" >
                {% if page.has_next %}
                <a class="page-link" href="?page={{page.next_page_number}}">Next</a>
                

                {% endif %}
                
        </ul>

    </nav>
</body>
</html>

模板是我继承了分页

{% extends "app1/base.html" %}
    {% block body_block %}
    
    
    {% if stock_sym %}
    <h1> {{sym}} </h1>
    <a href ="{% url 'app1:addpost' sym %}">Add Post<span class="sr-only">(current)</span></a> 
        {% if stocks %}
    
        
        <ul>
        {% for post in stocks %}
        <li><a href="{% url 'app1:article-detail' post.pk %}">{{sym}}</a> -
            {{post.author}} - <small>{{post.post_date}}</small> - 
            {% if user.is_authenticated %}
            <small><a href="{% url 'app1:updatepost' post.pk %}">Edit</a></small><small>
            <a href="{% url 'app1:deletepost' post.pk %}">- Delete</a>  
            </small></li>
            {% endif %}
    
        {% endfor %}
        </ul>
    {% else %}
    <h1>No posts yet</h1>
    {% endif %}
    {% else %}
    <h1>hey</h1>
    {% endif %}
    {% include 'app1/pagination.html' with page=posts %}
    {% endblock %}

这是我在图片中的问题，所以你可以看到我在说什么：

【问题讨论】：

标签： python django post pagination blogs

【解决方案1】：

在这里我们添加stock_posts = paginator.get_page(page) 以按页面显示数据。

请试试这个：

def StockView(request, sym, ):
    stock_posts = Post.objects.filter(stock__symbol=sym)
    stock_sym = get_object_or_404(StockNames,symbol = sym)
    post_list = Post.objects.filter(stock__symbol=sym)
    paginator = Paginator(post_list, 2)
    page = request.GET.get('page')
    stock_posts = paginator.get_page(page)
    try:
        posts = paginator.page(page)
    except PageNotAnInteger:
        posts = paginator.page(1)
    except EmptyPage:
        posts = paginator.page(paginator.num_pages)

    return render(request, 'app1/stockview.html', {'page':page,'posts':posts,'stocks':stock_posts, 'stock_sym':stock_sym, 'sym':sym })

【讨论】：