Try DJANGO Tutorial -- Part II

11. Change a Model

class Product(models.Model):
    title = models.CharField(max_length=120)
    description = models.TextField(blank=True, null=True)
    price = models.DecimalField(decimal_places=2, max_digits=10000)
    summary = models.TextField(null=False, blank=False)
    featured = models.BooleanField(default=False)

12. Default Homepage to Custom Homepage

python manage.py startapp pages

pages/views.py:

from django.http import HttpResponse


def home_view(*args, **kwargs):
    return HttpResponse("
Hello world
")

trydjango/urls.py:

from django.contrib import admin
from django.urls import path

from pages.views import home_view

urlpatterns = [
    path('admin/', admin.site.urls),
    path('', home_view, name="home"),
]

13. URL Routing and Requests

pages/views.py:

from django.http import HttpResponse


def home_view(request, *args, **kwargs):
    print(args, kwargs)
    print(request.user)
    return HttpResponse("
Hello world
")


def contact_view(request, *args, **kwargs):
    return HttpResponse("
Contact page
")


def about_view(request, *args, **kwargs):
    return HttpResponse("
About page
")


def social_view(request, *args, **kwargs):
    return HttpResponse("
Social page
")

trydjango/urls.py:

from django.contrib import admin
from django.urls import path

from pages.views import home_view, contact_view, about_view, social_view

urlpatterns = [
    path('admin/', admin.site.urls),
    path('', home_view, name="home"),
    path('contact', contact_view),
    path('about', about_view),
    path('social', social_view),
]

14. Django Templates

trydjango/settings.py:

TEMPLATES = [
    {
        # ...
        'DIRS': [os.path.join(BASE_DIR, "templates")],
        # ...
    },
]

pages/views.py:

from django.http import HttpResponse
from django.shortcuts import render


def home_view(request, *args, **kwargs):
    print(args, kwargs)
    print(request.user)
    return render(request, 'home.html')


def contact_view(request, *args, **kwargs):
    return render(request, 'contact.html')


def about_view(request, *args, **kwargs):
    return render(request, 'about.html')

templates/home.html

Home page

15. Django Templating Engine Basics

templates/base.html:

    
        
        
    
    
        
Try Django
        {% block content %}
        {% endblock %}
    

templates/home.html:

{% extends 'base.html' %}

{% block content %}
    
Home page
    
This is a template
{% endblock %}

16. Include Template Tag

templates/navbar.html:

    

        
Brand
        
Contact
        
About
    

templates/base.html

    
        {% include 'navbar.html' %}
        
Try Django
        {% block content %}
        {% endblock %}
    

17. Rendering Context in a Template

pages/views.py:

def about_view(request, *args, **kwargs):
    my_context = {
        "my_text": "This is about us",
        "my_number": 123,
        "my_list": ['abc', 'def', 'ghijk']
    }
    return render(request, 'about.html', my_context)

templates/about.html:

{% extends 'base.html' %}

{% block content %}

    
About us
    
This is about page.

    
{{ my_text }},{{ my_number }},{{ my_list }}

{% endblock %}

18. For Loop in a Template

templates/about.html:

    

        {% for item in my_list %}
            
{{ forloop.counter }} - {{ item }}
        {% endfor %}
    

19. Using Conditions in a Template

templates/about.html:

    

        {% for item in my_list %}
            {% if item == 123 %}
                
{{ forloop.counter }} - {{ item | add:22 }}
            {% elif item == "Abc" %}
                
This is not the network
            {% else %}
                
{{ forloop.counter }} - {{ item }}
            {% endif %}
        {% endfor %}
    

20. Template Tags and Filters

• https://docs.djangoproject.com/en/2.1/ref/templates/builtins/