how to show list of categories in navbar using django framework-CodePudding

hello I want to list my categories in navbar from database but the navbar is a partial view and I included my navbar in base.html . how can i give the data to this navbar

this is base.html that i included the partial view:

<body>
   {% include "includes/navbar.html" %}
</body>

this is partial view:

<nav >
    <div >
        <a  href="#">TechNerd</a>
        <button aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation" 
                data-bs-target="#navbarSupportedContent" data-bs-toggle="collapse" type="button">
            <span ></span>
        </button>
        <div  id="navbarSupportedContent">
            <ul >
                <li >
                    <a  href="{% url 'post:posts' %}">Posts</a>
                </li>
                <li >
                    <a aria-expanded="false"  data-bs-toggle="dropdown" href="#"
                       id="navbarDropdown" role="button">
                        categories
                    </a>
                    <ul aria-labelledby="navbarDropdown" >
                      <li><a  href="#">Action</a></li>
                      <li><a  href="#">Action</a></li>
                    </ul>
                </li>

            </ul>
        </div>
    </div>
</nav>

CodePudding user response：

With Context Processors you can pass data to template. So, can use them every .html page.

your_project/context_processors.py

from .models import Category
def category_list(request):
    return {
        "category_urls": [
            {"name": category.name, "url": category.get_absolute_url()}
            for category in Category.objects.all()
        ]
    }

in settings.py

TEMPLATES = [
    {
        "BACKEND": "django.template.backends.django.DjangoTemplates",
        "DIRS": [str(BASE_DIR / "templates")],
        "APP_DIRS": True,
        "OPTIONS": {
            "context_processors": [
                "django.template.context_processors.debug",
                "django.template.context_processors.request",
                "django.contrib.auth.context_processors.auth",
                "django.contrib.messages.context_processors.messages",
                "my_app.context_processors. category_list"
            ],
        },
    },
]

in base.html

{% for category in category_urls %}
    
    <a href="{{category.url}}">{{category.name }}</a>
{% endfor %}

CodePudding user response：

You can use a custom context processor to add data to the template context for every request.

# myapp/context_processors.py
from .models import Category

def catgories(request):
    return {
        "categories": Category.objects.all()
    }

# settings.py
TEMPLATES = [
    {
        "BACKEND": "django.template.backends.django.DjangoTemplates",
        # ...your other settings....
        "OPTIONS": {
            "context_processors": (
                "django.contrib.auth.context_processors.auth",
                # ...other processors you use
                "myapp.context_processors.categories",
            ),
        },
    }
]

# my_template.html
{% for category in categories %}
     {{ category.name }}
{% endfor %}

CodePudding user response：

You can build your own context processor where it will be run with each request and pass the data from there. You will find a detailed answer in this link (Django variable in base.html).