Cart shows items in it; disables buttons if item in basket

- Rough cart icon in navbar
- Shows items in cart
- Styled dependent on existence
- Add to cart buttons disabled if resource in cart, on resource list
  page and detail page
- Throws 404 error if trying add item to cart which has no price -
  eventually all items will have a price

1 files changed, 7 insertions, 2 deletions

diff --git a/alphabetlearning/payments/views.py b/alphabetlearning/payments/views.py
index d32542b..95eb5c8 100644
--- a/alphabetlearning/payments/views.py
+++ b/alphabetlearning/payments/views.py
@@ -1,5 +1,5 @@
 import stripe
-from django.http import HttpResponse
+from django.http import HttpResponse, HttpResponseBadRequest
 from django.core.mail import send_mail
 from django.conf import settings
 from django.contrib.auth.decorators import login_required
@@ -21,9 +21,11 @@ from .models import ShoppingCart
 # TODO get the cart integrated with Stripe
 # Steps to convert our Cart into something that can be used with Stripe:
 #
+#    - Fix the total in the cart
 #    - X Sort out the webhook
 #    - Associate the purchases with the users profile page
 #    - We need a profile page!
+#        - Link in navbar (when logged in)
 #    - Fix the email and make it nice
 #    - Associate each of our resources with a Product item
 #        - this should be done in the create resource page
@@ -94,7 +96,10 @@ def add_to_cart(request, resource_id):
 def cart_detail(request):
     cart, created = ShoppingCart.objects.get_or_create(user=request.user)
     resources = [i.resource for i in cart.items.all()]
-    total = sum([r.price_obj.first().price for r in resources])
+    try:
+        total = sum([r.price_obj.first().price for r in resources])
+    except AttributeError:
+        return HttpResponseBadRequest(f"There is no price assigned to at least one of the resources you have added to the basket. Please contact Alphabet Learning Support.")
     context = {
             "cart": cart,
             "resources": resources,