Add user to Group after purchase

[Lightning Bit]

Hi All, 

How would one add a user to a certain Backend group in the Django Administration after a user purchases a particular item? I have played around with tons of techniques but nothing is working. 

Thanks!

[Derek]

You need to use a "post save" signal; see:

https://docs.djangoproject.com/en/3.1/ref/signals/#post-save

[King Niko]

Thanks Derek!

I tried using the signals but it is not working. This is how my signals and models looks:

Signals.py:

from django.contrib.auth.models import User

from .models import *

from django.db.models.signals import post_save

from django.dispatch import receiver

from django.contrib.auth.models import Group 

@receiver(post_save, sender=User)

def subscription_group(sender, instance, created, **kwargs):

        if OrderItem.product == 'Subscription_Product':

                Order.complete == True

                group = Group.objects.get(name='subscribees')

                User.groups.add(group)

                print('New Subscribee Added')

Models.py:

from django.db import models

from django.contrib.auth.models import User

# Create your models here.

        

class Customer(models.Model):

    user = models.OneToOneField(User, null=True, blank=True, on_delete=models.CASCADE )

    name = models.CharField(max_length=200, null=True)

    email = models.CharField(max_length=200, null=True)

    phone = models.CharField(max_length=200, null=True)

    profile_pic = models.ImageField(default="chicken_suit.gif" ,null=True, blank=True)

    data_created = models.DateTimeField(auto_now_add=True, null=True)

    @property

    def picURL(self):

                    try:

                            url = self.profile_pic.url

                    except: 

                            url= ''

                    return url

    def __str__(self):

        return self.name

class Product(models.Model):

        name = models.CharField(max_length=200)

        price = models.FloatField()

        digital = models.BooleanField(default=False, null=True, blank=True)

        image = models.ImageField(null=True, blank=True)

        view = models.URLField(default=False, null=True, blank=True)

        

        def __str__(self):

                return self.name

        @property

        def imageURL(self):

                    try:

                            url = self.image.url

                    except: 

                            url= ''

                    return url

class Order(models.Model):

    customer = models.ForeignKey(Customer, on_delete=models.SET_NULL, null=True, blank=True)

    date_ordered = models.DateTimeField(auto_now_add=True)

    complete = models.BooleanField(default=False)

    transaction_id = models.CharField(max_length=100, null=True)

    def __str__(self):

        return str(self.id)

    @property 

    def get_cart_total(self):

        orderitems = self.orderitem_set.all()

        total = sum([item.get_total for item in orderitems])

        return total

    

    @property

    def get_cart_items(self):

        orderitems = self.orderitem_set.all()

        total = sum([item.quantity for item in orderitems])

        return total

    @property

    def shipping(self):

        shipping= False

        orderitems = self.orderitem_set.all()

        for i in orderitems:

            if i.product.digital == False:

                    shipping = True

        return shipping

class OrderItem(models.Model):

    product = models.ForeignKey(Product, on_delete=models.SET_NULL, null=True)

    order = models.ForeignKey(Order, on_delete=models.SET_NULL, null=True)

    quantity = models.IntegerField(default=0, null=True, blank=True)

    date_added = models.DateTimeField(auto_now_add=True)

    VALUE_ADDED_TAX = 6.0

    tax= VALUE_ADDED_TAX/100

    

    @property

    def get_total(self):

            total = self.product.price * self.quantity + (self.tax * self.product.price)

            return total

When an individual purchases, the signal is not received and that individual is not added to the "subscribees" group. 

Any further suggestions?

[Derek]

I am not sure about your details but is my code structure.  Note that the signals are in the same file as the models (may be easier to start there first).

from django.db.models.signals import post_save

class MyModel(Model):

    id = AutoField(primary_key=True)

    # etc.

def MyModel_postsave_handler(sender, **kwargs):

    obj = kwargs['instance']  # object that was saved!

    # add logic  ...

post_save.connect(

    MyModel_postsave_handler,

    sender=MyModel,

    dispatch_uid="mymodel.models") 

    

I hope this simple example can help?  Try to use pdb to see if the postsave_handler function is reached.

[Lightning Bit]

I did a bit of testing and I discovered a new method for adding a user to a group after purchase. It is similar to signals, except it strictly uses the views.py:

This current version is bugged (since I am a Django noob), but if I can somehow direct the active authenticated user to the new group through the code below, this issue will finally be resolved: 

def Order_Processor(request):

    

            if request.user.is_authenticated:

                        customer= request.user.customer

                        order,created = Order.objects.get_or_create(customer=customer, complete=False)

                        

                        user = request.user.is_authenticated

                        group = Group.objects.get(name='target_group')

                        user.groups.add(group)

            

            return redirect('home')

The area in red is what really needs some editing. Would you happen to know how to modify this for operationality? 

Thank you!!

[Dvs Khamele]

Hi do you hire contract based python/django freelancer?

 We can help you in this and related tasks at fair prices. Reply or send email to div...@pythonmate.com

Best Regards, 

Divyesh Khamele,

Pythonmate

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