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PayPal Implementation in Django Rest Framework.

paulsaul621 on October 31, 2022

Introduction. If you're a Django developer, then you know that Django Rest Framework is a great tool for building RESTful APIs. But what...

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Tim • Mar 27 '23 • Edited

Okay, I got a little further. I'm trying to get links back from paypal for my payment. I've got my token from paypal and requesting the links. I don't know how to get more info other than a 400 error. I can't find on the paypal site the format for the message. I am running this from localhost. I also noticed in the json "landing_page": "BILLING" is this important or just a name?

This is the error
order_id = response.json()['id'] …
Local vars
Variable Value
headers
{'Authorization': 'Bearer '
'this is the auth token',
'Content-Type': 'application/json'}
json_data

{'application_context': {'brand_name': 'Nebraska Youth Camp',
'cancel_url': '/registration/cancel_url',
'landing_page': 'BILLING',
'notify_url': '/registration/notify_url',
'return_url': '/registration/return_url',
'shipping_preference': 'NO_SHIPPING',
'user_action': 'CONTINUE'},
'intent': 'CAPTURE',
'purchase_units': [{'amount': {'currency_code': 'USD', 'value': '200'},
'custom_id': 'Camp Session',
'description': 'Summer Camp',
'reference_id': '294375635',
'soft_descriptor': 'Camp Session'}]}
request

response

self

token

'my token was here'

def PaypalToken(client_ID, client_Secret):

    url = "https://api-m.sandbox.paypal.com/v1/oauth2/token"
    data = {
                "client_id":client_ID,
                "client_secret":client_Secret,
                "grant_type":"client_credentials"
            }
    headers = {
                "Content-Type": "application/x-www-form-urlencoded",
                "Authorization": "Basic {0}".format(base64.b64encode((client_ID + ":" + client_Secret).encode()).decode())
            }

    token = requests.post(url, data, headers=headers)
    return token.json()['access_token']

class CreateOrderViewRemote(APIView):
    def get(self, request):
        token = PaypalToken(clientID, clientSecret)
        headers = {
            'Content-Type': 'application/json',
            'Authorization': 'Bearer '+token,
        }
        json_data = {
             "intent":"CAPTURE",
             "application_context": {
                 "notify_url": reverse('paypal-notify'),
                 "return_url": reverse('paypal-return'),#change to your doma$
                 "cancel_url": reverse('paypal-cancel'), #change to your domain
                 "brand_name": "Nebraska Youth Camp",
                 "landing_page": "BILLING",
                 "shipping_preference": "NO_SHIPPING",
                 "user_action": "CONTINUE"
             },
             "purchase_units": [
                 {
                     "reference_id": "294375635",
                     "description": "Summer Camp",

                     "custom_id": "Camp Session",
                     "soft_descriptor": "Camp Session",
                     "amount": {
                         "currency_code": "USD",
                         "value": "200" #amount,
                     },
                 }
             ]
         }
        response = requests.post('https://api-m.sandbox.paypal.com/v2/checkout/orders', headers=headers, json=json_data)
        order_id = response.json()['id'] # error here because return error 400, no id
        linkForPayment = response.json()['links'][1]['href']
        return linkForPayment

Thanks for your help.

paulsaul621 • Mar 29 '23

Please print("response.text") so that I cam see the actual error. Landing page is where the user lands after being redirected to paypal for payments. In our case is billing. You can check PayPal documentation for the other landing pages.

Tim • Mar 29 '23

I was able to get it to work. I used json.dump() but someone else said that if I name the variable json or at lease put json=json_data in the args that it should retain the json format. After trying this I see he's correct. I know you have that in your code but I had combined with other code I saw. I also ran through a json validator and found some commas that were not strict json. Thanks again.

paulsaul621 • Mar 31 '23

Great!

Tim • Mar 25 '23

what does "requests.post" refer to?

paulsaul621 • Mar 26 '23

requests.post is a function in the Python requests library that sends an HTTP POST request to the specified URL

Tim • Mar 25 '23

What is the APIView you refer to? Is that something we need to create?

Tim • Mar 25 '23

Okay, so I found this. It's part of the djangorestframework

Tim • Apr 13 '23

How do we use the Capture Order function? Do we need to make a request of Paypal then have it return to the capture order? When I have it redirect after payment the only thing in the url is the token and the payerId. Does the request.data.get('token') just get the token from the url? I get a "missing schema" on the request.data.get('url').

Tim • Mar 29 '23

I have another question. I'm not really familiar with the rest-framework api. I get a page with the link to pay, see below, but how do I get that on my own html? Will it work if I just return to a page that I've created?

Tim • Mar 26 '23

Is the viewset class from the djangorestframework? Do I need to start a new file with this?