Django PayPal (4) – Subscriptions Django.How

Resources:

https://overiq.com/django-paypal-subscriptions-with-django-paypal/

https://overiq.com/django-paypal-integration-with-django-paypal/

simple_ecommerce/django_project/ecommerce_app/views.py

from paypal.standard.forms import PayPalPaymentsForm

from django.views.decorators.csrf import csrf_exempt

from .models import Product, Order, LineItem


def process_payment(request):
    #...


@csrf_exempt
def payment_done(request):
    return render(request, 'ecommerce_app/payment_done.html')


@csrf_exempt
def payment_canceled(request):
    return render(request, 'ecommerce_app/payment_cancelled.html')


def checkout(request):
    if request.method == 'POST':
        form = CheckoutForm(request.POST)
        if form.is_valid():
            cleaned_data = form.cleaned_data
        #...
        #...

            cart.clear(request)

            request.session['order_id'] = o.id
            return redirect('process_payment')


    else:
        form = CheckoutForm()
        return render(request, 'ecommerce_app/checkout.html', locals())

process_payment.html

{% extends 'ecommerce_app/base.html' %} {% block title %}Make Payment{% endblock %} {% block content %} <h4>Pay with PayPal</h4> {{ form.render }} {% endblock %}

payment_done.html

{% extends 'ecommerce_app/base.html' %} {% block content %} Payment done. {% endblock %}

payment_cancelled.html

{% extends 'ecommerce_app/base.html' %} {% block content %} Payment cancelled. {% endblock %}

simple_ecommerce/django_project/ecommerce_app/urls.py


urlpatterns = [
    path('', views.index, name='index'),
    path('product///',
        views.show_product, name='show_product'),
    path('cart/', views.show_cart, name='show_cart'),
    path('checkout/', views.checkout, name='checkout'),
    path('process-payment/', views.process_payment, name='process_payment'),
    path('payment-done/', views.payment_done, name='payment_done'),
    path('payment-cancelled/', views.payment_canceled, name='payment_cancelled'),
]

settings.py add


PAYPAL_RECEIVER_EMAIL = '[email protected]'

PAYPAL_TEST = True

Subscription

simple_ecommerce/django_project/ecommerce_app/forms.py


class CheckoutForm(forms.ModelForm):
    #...

subscription_options = [
    ('1-month', '1-Month subscription ($10 USD/Mon)'),
    ('6-month', '6-Month subscription Save $10 ($50 USD/Mon)'),
    ('1-year', '1-Year subscription Save $30 ($90 USD/Mon)'),
]


class SubscriptionForm(forms.Form):
    plans = forms.ChoiceField(choices=subscription_options)

simple_ecommerce/django_project/ecommerce_app/views.py

from .models import Product, Order, LineItem

from .forms import CartForm, CheckoutForm, SubscriptionForm

from . import cart


@csrf_exempt
def payment_canceled(request):
    return render(request, 'ecommerce_app/payment_cancelled.html')


def subscription(request):
    if request.method == 'POST':
        f = SubscriptionForm(request.POST)
        if f.is_valid():
            request.session['subscription_plan'] = request.POST.get('plans')
            return redirect('process_subscription')
    else:
        f = SubscriptionForm()
    return render(request, 'ecommerce_app/subscription_form.html', locals()

simple_ecommerce/django_project/ecommerce_app/templates/ecommerce_app/subscription_form.html

{% extends "ecommerce_app/base.html" %} {% block title %}Subscribe{% endblock %} {% block content %} <form action="" method="post"> {% csrf_token %} {{ f }} <input type="submit" value="Subscribe"> </form> {% endblock %}

simple_ecommerce/django_project/ecommerce_app/urls.py


urlpatterns = [
    #...
    path('checkout/', views.checkout, name='checkout'),
    path('process-payment/', views.process_payment, name='process_payment'),
    path('payment-done/', views.payment_done, name='payment_done'),
    path('payment-cancelled/', views.payment_canceled, name='payment_cancelled'),
    path('subscribe/', views.subscription, name='subscription'),    
]

simple_ecommerce/django_project/ecommerce_app/views.py


def subscription(request):
    #...

def process_subscription(request):

    subscription_plan = request.session.get('subscription_plan')
    host = request.get_host()

    if subscription_plan == '1-month':
        price = "10"
        billing_cycle = 1
        billing_cycle_unit = "M"
    elif subscription_plan == '6-month':
        price = "50"
        billing_cycle = 6
        billing_cycle_unit = "M"
    else:
        price = "90"
        billing_cycle = 1
        billing_cycle_unit = "Y"


    paypal_dict  = {
        "cmd": "_xclick-subscriptions",
        'business': settings.PAYPAL_RECEIVER_EMAIL,
        "a3": price,  # monthly price
        "p3": billing_cycle,  # duration of each unit (depends on unit)
        "t3": billing_cycle_unit,  # duration unit ("M for Month")
        "src": "1",  # make payments recur
        "sra": "1",  # reattempt payment on payment error
        "no_note": "1",  # remove extra notes (optional)
        'item_name': 'Content subscription',
        'custom': 1,     # custom data, pass something meaningful here
        'currency_code': 'USD',
        'notify_url': 'http://{}{}'.format(host,
                                           reverse('paypal-ipn')),
        'return_url': 'http://{}{}'.format(host,
                                           reverse('payment:done')),
        'cancel_return': 'http://{}{}'.format(host,
                                              reverse('payment:canceled')),
    }

    form = PayPalPaymentsForm(initial=paypal_dict, button_type="subscribe")
    return render(request, 'payment/process_subscription.html', locals())

simple_ecommerce/django_project/ecommerce_app/templates/ecommerce_app/process_subscription.html

{% extends "ecommerce_app/base.html" %} {% block title %}Pay using PayPal{% endblock %} {% block content %} <h4>Subscribe using PayPal</h4> {{ form.render }} {% endblock %}

simple_ecommerce/django_project/ecommerce_app/urls.py


urlpatterns = [
    #...
    path('subscribe/', views.subscription, name='subscription'),
    path('process_subscription/', views.process_subscription, name='process_subscription'),
]

simple_ecommerce/django_project/ecommerce_app/signals.py

from paypal.standard.ipn.signals import valid_ipn_received

from django.dispatch import receiver

from paypal.standard.models import ST_PP_COMPLETED

from django.core.mail import EmailMessage

from django.contrib.auth.models import User

from datetime import datetime


@receiver(valid_ipn_received)
def ipn_receiver(sender, **kwargs):
    ipn_obj = sender

Check for Buy Now IPN


    if ipn_obj.txn_type == 'web_accept':

        if ipn_obj.payment_status == ST_PP_COMPLETED:
            # payment was successful
            print('great!')
            order = get_object_or_404(Order, id=ipn_obj.invoice)

            if order.get_total_cost() == ipn_obj.mc_gross:
                # mark the order as paid
                order.paid = True
                order.save()

Check for subscription signup IPN


    elif ipn_obj.txn_type == "subscr_signup":

        # get user id and activate the account
        id = ipn_obj.custom
        user = User.objects.get(id=id)
        user.active = True
        user.save()

        subject = 'Sign Up Complete'

        message = 'Thanks for signing up!'

        email = EmailMessage(subject,
                             message,
                             '[email protected]',
                             [user.email])

        email.send()

Check for subscription payment IPN


    elif ipn_obj.txn_type == "subscr_payment":

        # get user id and extend the subscription
        id = ipn_obj.custom
        user = User.objects.get(id=id)
        # user.extend()  # extend the subscription

        subject = 'Your Invoice for {} is available'.format(
            datetime.strftime(datetime.now(), "%b %Y"))

        message = 'Thanks for using our service. The balance was automatically ' \
                  'charged to your credit card.'

        email = EmailMessage(subject,
                             message,
                             '[email protected]',
                             [user.email])

        email.send()

Check for failed subscription payment IPN

elif ipn_obj.txn_type == "subscr_failed":
pass

Check for subscription cancellation IPN

elif ipn_obj.txn_type == "subscr_cancel":
pass