Django —
Apps, URLs & Views

python manage.py startapp students

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'students',   # ← الـ App اللي أنشأناها
]

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

urlpatterns = [
    path('admin/', admin.site.urls),
    path('students/', include('students.urls')),  # ← يحوّل كل /students/* للـ App
    path('courses/', include('courses.urls')),   # ← يحوّل كل /courses/* للـ App
]

urlpatterns = [
    path('student/<int:id>/', views.student_detail),  # id رقم صحيح
    path('profile/<str:username>/', views.profile),  # username نص
]

from django.http import HttpResponse

def student_detail(request, id):   # id بييجي كـ Argument
    return HttpResponse(f'طالب رقم: {id}')

def profile(request, username):
    return HttpResponse(f'Profile of: {username}')

from django.http import HttpResponse

def home(request):
    return HttpResponse('Welcome to the Students App')

def about(request):
    return HttpResponse('This is the About page')

def contact(request):
    return HttpResponse('<h1>Contact Us</h1><p>Email: info@cu.edu.eg</p>')

from django.http import HttpResponse

def home(request):
    return HttpResponse('Students Home Page')

def contact(request):
    return HttpResponse('Contact the students office')

def help_page(request):
    return HttpResponse('Help and FAQ page')

from django.urls import path
from . import views

urlpatterns = [
    path('', views.home, name='home'),
    path('contact/', views.contact, name='contact'),
    path('help/', views.help_page, name='help'),
]

from django.shortcuts import render

def home(request):
    context = {
        'title': 'Students Home',
        'message': 'Welcome to the students portal',
        'count': 250,
    }
    return render(request, 'students/home.html', context)

<h1>{{ title }}</h1>
<p>{{ message }}</p>
<p>Total students: {{ count }}</p>

<!-- Template Tags — Logic -->
{% if count > 100 %}
  <span>Large class!</span>
{% endif %}

from django.http import JsonResponse

def api_status(request):
    return JsonResponse({
        'status': 'ok',
        'app': 'students',
        'version': '1.0'
    })

from django.http import HttpResponse, JsonResponse

def demo(request):
    if request.GET.get('format') == 'json':
        return JsonResponse({'page': 'demo'})
    return HttpResponse('Demo page in HTML')

# خطأ — اسم الـ App غلط
path('students/', include('student.urls'))  # مفيش s في النهاية

# صح
path('students/', include('students.urls'))