我想基于类别模型动态创建菜单链接。我已经使用DetailView和ListView来创建单个类别的列表和详细信息页面,并且运行良好。
现在,我希望每次用户添加新类别时都在base.html中的“下拉菜单”中看到一个新链接。
这是 base.html
{% load static %}
<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
<title>{% block head_title %}Test{% endblock head_title %}</title>
</head>
<body>
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="navbar-nav mr-auto">
<li class="nav-item active">
<a class="nav-link" href="/">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="{% url 'list_tag' %}">Tag</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
Category
</a>
<div class="dropdown-menu" aria-labelledby="navbarDropdown">
{% for category in category_list %}
<a href="{{ category.get_absolute_url }}">{{ category.category_name }}</a>
{% endfor %}
</div>
</li>
</div>
</nav>
<div class="container">
<!-- INIZIO corpo centrale -->
{% block content %}
{% endblock content %}
<!-- FINE corpo centrale -->
</div>
<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js" integrity="sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" integrity="sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" crossorigin="anonymous"></script>
</body>
</html>
这是 list_category.html
{% extends 'base.html' %}
{% load static %}
{% block head_title %}Elenco Categorie | {{ block.super }}{% endblock head_title %}
{% block content %}
{% for category in category_list %}
<h1><a href="{{ category.get_absolute_url }}">{{ category.category_name }}</a></h1>
<hr>
{% endfor %}
{% endblock content %}
这是 views.py
class CategoryList(ListView):
model = Category
context_object_name = 'category_list'
template_name = "list_category.html"
class SingleCategory(DetailView):
model = Category
template_name = "single_category.html"
当我使用base.html中的代码时,显示了一个空菜单。 我该如何解决?
更新:
使用this post中的@ ans2human解决方案,我创建了一个文件 context_processors.py ,如下所示:
from .models import Category
def blog_menu(request):
link_menu = Category.objects.all()
return {
'link_menu': link_menu
}
然后我将字符串添加到 settings.py :
'blog.context_processors.blog_menu',
下拉菜单的新字符串如下:
<li class="nav-item active dropdown">
<a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
<i class="far fa-newspaper" id="img"></i> Blog
</a>
<div class="dropdown-menu" aria-labelledby="navbarDropdown">
<a class="dropdown-item" href="#"></i> {{ link_menu }}</a>
</div>
</li>
似乎可以正常工作,但不能正常工作。我该如何解决?
答案 0 :(得分:1)
更新2
好消息! 由于我不是django专家,所以我遇到了小麻烦。通过更多的推理,我找到了解决方案。
解决方案下方:
<div class="dropdown-menu" aria-labelledby="navbarDropdown">
{% for link in link_menu %}
<a class="dropdown-item" href="{{ link.get_absolute_url }}"> {{ link.category_name }}</a>
{% endfor %}
</div>