Adding refresh basket functionality

EDMS/EDMS/settings.py

@@ -38,6 +38,7 @@ INSTALLED_APPS = [
     'django.contrib.messages',
     'django.contrib.staticfiles',
     'shoppingCart',
+    'django_crontab',
 
 ]
 
@@ -82,6 +83,10 @@ DATABASES = {
     }
 }
 
+#cron job
+CRONJOBS = [
+    ('*/1 * * * *', 'shoppingCart.cron.expired_order_items')
+]
 
 # Password validation
 # https://docs.djangoproject.com/en/3.1/ref/settings/#auth-password-validators

EDMS/shoppingCart/admin.py

@@ -5,4 +5,4 @@ from .models import *
 admin.site.register(Customer)
 admin.site.register(Product)
 admin.site.register(Order)
-admin.site.register(OrderItem)
+admin.site.register(OrderItem)

EDMS/shoppingCart/cron.py

@@ -0,0 +1,19 @@
+from .models import OrderItem
+from datetime import timedelta,datetime
+
+def expired_order_items():
+  #get time now
+  time_now = datetime.now()
+  #querry order items with expired set to false
+  qs = OrderItem.objects.filter(expired=False)
+
+  #for items in qs:
+  for item in qs:
+    #set expiry date = orderitem .date created + timedelta(minutes=2)
+    expiry_date = item.date_created + timedelta(minutes=2)
+      #check if time now < expiry date:
+    if time_now >= expiry_date:
+      #set expired field to true
+      item.expired = True
+      # delete order item
+      item.delete()

EDMS/shoppingCart/migrations/0004_auto_20201016_1152.py

@@ -0,0 +1,25 @@
+# Generated by Django 3.1.2 on 2020-10-16 11:52
+
+from django.db import migrations, models
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('shoppingCart', '0003_auto_20201012_1250'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='orderitem',
+            name='date_created',
+            field=models.DateTimeField(auto_now_add=True, default=django.utils.timezone.now),
+            preserve_default=False,
+        ),
+        migrations.AddField(
+            model_name='orderitem',
+            name='expired',
+            field=models.BooleanField(default=False),
+        ),
+    ]

EDMS/shoppingCart/models.py

@@ -1,6 +1,7 @@
 from django.db import models
 from django.contrib.auth.models import User
 
+
 # Create your models here.
 
 class Customer(models.Model):
@@ -22,6 +23,7 @@ class Product(models.Model):
 class Order(models.Model):
     customer = models.ForeignKey(Customer, on_delete = models.SET_NULL, blank=True, null=True)
     complete = models.BooleanField(default=False, null=True, blank=True)
+
 
     def __str__ (self):
         return str(self.id)
@@ -30,7 +32,13 @@ class OrderItem(models.Model):
     product = models.ForeignKey(Product, on_delete=models.SET_NULL, blank=True, null=True)
     order = models.ForeignKey(Order, on_delete=models.SET_NULL, blank=True, null=True)
     quantity = models.IntegerField(default=0, null=True, blank=True)
+    date_created = models.DateTimeField(auto_now_add=True)
+    expired = models.BooleanField(default=False)
 
     def __str__(self):
         return self.product.name
 
+
+
+
+

EDMS/shoppingCart/urls.py

@@ -7,3 +7,4 @@ urlpatterns = [
     path('updateItem/', views.updateItem, name="updateItem"),
 ]
 
+

EDMS/shoppingCart/views.py

@@ -29,18 +29,24 @@ def updateItem(request):
     order, created = Order.objects.get_or_create(customer=customer,complete=False)
     orderItem, created = OrderItem.objects.get_or_create(order=order, product=product)
 
+    #query order that did not expire
+    #querry orderitems in the order
+    #make sure the quantity does not exceed 9
+
     if orderItem.quantity >= 9 :
         messages.error(request, 'You bought 9 ' + str(orderItem.product) +"'s this week already")
         exit
     elif action == 'add':
         orderItem.quantity = (orderItem.quantity + 1)
     elif action =='remove':
-        orderItem.quantity = (orderItem.quantity -1)
+        orderItem.quantity = (orderItem.quantity - 1)
 
     orderItem.save()
 
     if orderItem.quantity <= 0:
         orderItem.delete()
 
     print('ProductID: ', productId,  'Action:',action)
-    return JsonResponse('item added', safe=False)
+    return JsonResponse('item added', safe=False)
+
+

Pipfile

@@ -8,6 +8,7 @@ verify_ssl = true
 [packages]
 django = "*"
 pillow = "*"
+django-crontab = "*"
 
 [requires]
 python_version = "3.8"