21CS62

 Program 1:Date and Time


Step 1:Terminal


django-admin startproject myproject 

cd myproject

py manage.py startapp myapp


Step 2:settings.py


Open the settings.py file inside the myproject directory. 

Find the INSTALLED_APPS list and add your app's name ('myapp') to the list. 

INSTALLED_APPS = [ 

    ... 

    'myapp', 

] 


Step 3:views.py


Open the views.py file inside your myapp directory and 

define a view.


from django.http import HttpResponse 

from datetime import datetime, timedelta 

 

def datetime_with_offsets(request): 

    now = datetime.now() 

    offset_hours = 4 

 

   

    four_hours_ahead = now + timedelta(hours=offset_hours) 

    four_hours_before = now - timedelta(hours=offset_hours) 

 

    html = f"<html><body><h1>Current Date and Time with Offsets:</h1>" \ 

            f"<p>Current: {now}</p>" \ 

            f"<p>Four Hours Ahead: {four_hours_ahead}</p>" \ 

            f"<p>Four Hours Before: {four_hours_before}</p></body></html>" 

    return HttpResponse(html) 


Step 4:myapp/urls.py (find/create this in myapp folder)

from django.urls import path 

from . import views 

 

urlpatterns = [ 

    path('datetime_with_offsets/', views.datetime_with_offsets, 

name='datetime_with_offsets'), 

] 


Step 5:myproject/urls.py (find this in myproject folder)


from django.contrib import admin 

from django.urls import path, include  # Import include 

 

urlpatterns = [ 

    path('admin/', admin.site.urls), 

    path('myapp/', include('myapp.urls')),   

] 


Step 6:Terminal (make sure you're in myproject directory else type 'cd myproject' in terminal)


py manage.py runserver 


Step 7:Browser

go to http://127.0.0.1:8000/


http://127.0.0.1:8000/myapp/


http://127.0.0.1:8000/myapp/datetime_with_offsets/  for displaying output


***********************************************************************************

Program 2: Student and Fruit List


Step 1:Terminal


django-admin startproject event_manager 

cd event_manager

py manage.py startapp events


Step 2:settings.py


Open the settings.py file inside the event_manager directory. 

Find the INSTALLED_APPS list and add your app's name ('events') to the list. 

INSTALLED_APPS = [ 

    ... 

    'events', 

] 


Step 3:events/models.py


from django.db import models 

 

class Fruit(models.Model): 

    name = models.CharField(max_length=100) 

 

    def __str__(self): 

        return self.name 

 

class Student(models.Model): 

    name = models.CharField(max_length=100) 

    event = models.CharField(max_length=100)  # Assuming the event name is a string 

    selected = models.BooleanField(default=False) 

 

    def __str__(self): 

        return self.name


Step 4:events/admin.py


from django.contrib import admin 

from .models import Fruit, Student 

 

admin.site.register(Fruit) 

admin.site.register(Student) 


Step 5:views.py


Open the views.py file inside your events directory and 

define a view.


from django.shortcuts import render 

from .models import Fruit, Student 

 

def fruit_list(request): 

    fruits = Fruit.objects.all() 

    return render(request, 'events/fruit_list.html', {'fruits': fruits}) 

 

def student_list(request): 

    students = Student.objects.filter(selected=True) 

    return render(request, 'events/student_list.html', {'students': students})


Step 6:events/templates/events (create folder 'templates' in events directory and then another new 'events' folder within templates)


Create two templates fruit_list.html and student_list.html files here


fruit_list.html: 

<!DOCTYPE html> 

<html> 

<head> 

    <title>Fruit List</title> 

</head> 

<body> 

    <h1>Available Fruits:</h1> 

    <ul> 

        {% for fruit in fruits %} 

            <li>{{ fruit.name }}</li> 

        {% endfor %} 

    </ul> 

</body> 

</html>

 

student_list.html: 

<!DOCTYPE html> 

<html> 

<head> 

    <title>Selected Students</title> 

</head> 

<body> 

    <h1>Selected Students for the Event:</h1> 

    <ol> 

        {% for student in students %} 

            <li>{{ student.name }}</li> 

        {% endfor %} 

    </ol> 

</body> 

</html>


Step 7:events/urls.py (find/create this in events folder)

from django.urls import path 

from . import views 

 

urlpatterns = [ 

    path('fruits/', views.fruit_list, name='fruit_list'), 

    path('students/', views.student_list, name='student_list'), 

] 


Step 8:event_manager/urls.py (find this in event_manager folder)


from django.contrib import admin 

from django.urls import path, include   

 

urlpatterns = [ 

    path('admin/', admin.site.urls), 

    path('events/', include('events.urls')),   

] 


Step 10:Terminal


python manage.py check

python manage.py makemigrations 

python manage.py migrate


python manage.py shell


>>> from events.models import Fruit

>>> p1=Fruit(name='Orange')

>>> p1.save()

>>> p2=Fruit(name='Apple')

>>> p2.save()

>>> p=Fruit.objects.all()

>>> p

<QuerySet [<Fruit: Orange>,<Fruit: Apple>]> 


>>> from events.models import Student

>>> q1=Student(name='John',event='Dance',selected=True)

>>> q1.save()

>>> q2=Student(name='Sam',event='Dance',selected=True)

>>> q2.save()

>>> q=Student.objects.all()

>>> q

<QuerySet [<Student: John>,<Student: Sam>]>


>>>exit()


Step 11:Terminal (make sure you're in event_manager directory else type 'cd event_manager' in terminal)


py manage.py runserver 


Step 12:Browser

go to http://127.0.0.1:8000/


http://127.0.0.1:8000/events/


http://127.0.0.1:8000/events/fruits/ and http://127.0.0.1:8000/events/students/  for displaying output


***********************************************************************************


Program 3: Course Registration


Step 1:Terminal


django-admin startproject course_registration 

cd course_registration

py manage.py startapp registration


Step 2:settings.py


Open the settings.py file inside the event_manager directory. 

Find the INSTALLED_APPS list and add your app's name ('events') to the list. 

INSTALLED_APPS = [ 

    ... 

    'registration', 

] 


Step 3:registration/models.py


from django.db import models 

 

class Course(models.Model): 

    name = models.CharField(max_length=100) 

    description = models.TextField() 

 

    def __str__(self): 

        return self.name 

 

class Student(models.Model): 

    name = models.CharField(max_length=100) 

    email = models.EmailField() 

    courses = models.ManyToManyField(Course, related_name='students') 

 

    def __str__(self): 

        return self.name


Step 4:registration/admin.py


from django.contrib import admin 

from .models import Course, Student 

 

admin.site.register(Course) 

admin.site.register(Student) 


Step 5:registration/views.py


Open the views.py file inside your registration directory and 

define a view.


from django.shortcuts import render 

from .models import Course 

 

def course_list(request): 

    courses = Course.objects.all() 

    return render(request, 'registration/course_list.html', {'courses': courses}) 

 

def register_student(request, course_id): 

    course = Course.objects.get(pk=course_id) 

    if request.method == 'POST': 

        name = request.POST.get('name') 

        email = request.POST.get('email') 

        student, created = course.students.get_or_create(name=name, email=email) 

        if created: 

            message = f'{student.name} registered successfully for {course.name}.' 

        else: 

            message = f'{student.name} is already registered for {course.name}.' 

        return render(request, 'registration/registration_confirmation.html', {'message': message}) 

    return render(request, 'registration/student_registration.html', {'course': course}) 


Step 6:registration/templates/registration (create folder 'templates' in registration directory and then another new 'registration' folder within templates)


Create three templates course_list.html, student_registration.html and registration_confirmation.html files here


course_list.html: 

<!DOCTYPE html>

<html>

<head>

    <title>Course List</title>

</head>

<body>

    <h1>Available Courses:</h1>

    <ol>

        {% for c in courses %}

            <li>{{ c.name }}</li>

        {% endfor %}

    </ol>

</body>

</html>


 

student_registration.html: 

<!DOCTYPE html>

<html lang="en">

<head>

    <title>Course Registration</title>

</head>

<body>

    <h1>Course Registration</h1>

    <form action="." method="POST">

        {% csrf_token %}

        <label for="name">Name: </label>

        <input type="text" id="name" name="name" value="">

        <label for="email">Email: </label>

        <input type="text" id="email" name="email" value="">

        <input type="submit" value="Submit">

    </form>

</body>

</html>


registration_confirmation.html: 

<!DOCTYPE html>

<html>

<head>

    <title>Confirmation Page</title>

</head>

<body>

    <h1>Confirmed!!!</h1>

    <p>{{ message }}</p>

</body>

</html>



Step 7:registration/urls.py (find/create this in events folder)

from django.urls import path 

from . import views 

 

urlpatterns = [ 

    path('', views.course_list, name='course_list'), 

    path('register/<int:course_id>/', views.register_student, name='register_student'),  

] 


Step 8:course_registration/urls.py (find this in event_manager folder)


from django.contrib import admin 

from django.urls import path, include   

 

urlpatterns = [ 

    path('admin/', admin.site.urls), 

    path('', include('registration.urls')),   

] 


Step 10:Terminal


python manage.py check

python manage.py makemigrations 

python manage.py migrate


python manage.py shell


>>> from registration.models import Course

>>> p1=Course(name='FSD',description='To create websites')

>>> p1.save()

>>> Course.objects.all()

<QuerySet [<Course: FSD>]>


>>>exit()


Step 11:Terminal (make sure you're in course_registration directory else type 'cd course_registration' in terminal)


py manage.py runserver 


Step 12:Browser

go to http://127.0.0.1:8000/ to view courses


http://127.0.0.1:8000/register/1/ to register


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