I'm trying to create a shopping cart model, I've created the Order Model, OrderItem model and Also the Item model. Although I find it difficult to link the order it model to the order in the API view.
here's the Model
class Pizza(models.Model):
id = models.AutoField(primary_key=True)
name = models.CharField(max_length=60)
desc = models.CharField(max_length=150)
price = models.IntegerField()
url = models.CharField(max_length=250)
def __str__(self):
return self.name
class OrderItem(models.Model):
id = models.AutoField(primary_key=True)
product = models.ForeignKey("Pizza", on_delete=models.CASCADE, null=True)
date_added = models.DateTimeField(auto_now=True)
date_ordered = models.DateTimeField(null=True)
amount = models.IntegerField(null=True)
def __str__(self):
return self.product.name
class Order(models.Model):
id = models.AutoField(primary_key=True)
name = models.CharField(max_length=60)
email = models.CharField(max_length=150)
address = models.CharField(max_length=150)
total = models.IntegerField()
created_at = models.DateTimeField(default=timezone.now)
items = models.ManyToManyField(OrderItem)
def __str__(self):
return self.name
//The viewset
class OrderViewSet(viewsets.HyperlinkedModelSerializer):
# permission_classes = [IsPostOrIsAuthenticated,]
serializer_class = OrderSerializer
queryset = Order.objects.all().order_by('-created_at')
Currently, I cant display the amount attribute of the order item in my API, It just shows the id and Also the link to the individual orderitem in an order
I think for cart you can use external fields on relations between Order and Pizza. Documentation about this here
Your models looks like:
class Pizza(models.Model):
name = models.CharField(max_length=60)
desc = models.CharField(max_length=150)
price = models.IntegerField()
url = models.CharField(max_length=250)
def __str__(self):
return self.name
class Order(models.Model):
name = models.CharField(max_length=60)
email = models.CharField(max_length=150)
address = models.CharField(max_length=150)
total = models.IntegerField()
created_at = models.DateTimeField(auto_now=True)
items = models.ManyToManyField(Pizza, through='OrderItem')
def __str__(self):
return self.name
class OrderItem(models.Model):
product = models.ForeignKey('Pizza', on_delete=models.CASCADE, null=True)
order = models.ForeignKey('Order', on_delete=models.CASCADE, null=True)
date_added = models.DateTimeField(auto_now=True)
date_ordered = models.DateTimeField(null=True)
amount = models.IntegerField(null=True)
def __str__(self):
return self.product.name
Example, how you can get dict of items amount in order:
order = Order.objects.filter('-created_at').first() // get last order
cart = {item.pk: item.amount for item in order.items}
Related
Im working in my Python Django ecommerce project.Now i have 2 classes Item and BookItem :
class Item(models.Model):
item_name = models.CharField(max_length=200, unique=True)
slug = models.SlugField(max_length=200,unique=True)
description = models.TextField(max_length=500, blank=True)
price = models.IntegerField()
images = models.ImageField(upload_to='photos/products')
stock = models.IntegerField()
is_available = models.BooleanField(default = True)
category = models.ForeignKey(Category,on_delete = models.CASCADE)
created_date = models.DateTimeField(auto_now=True)
modified_date= models.DateTimeField(auto_now=True)
def __str__(self):
return self.item_name
def get_url(self):
return reverse('item_detail',args=[self.category.slug, self.slug])
class BookItem(Item):
book = models.ForeignKey(Book,on_delete = models.CASCADE)
I want to get BookItem data from the class Item.Anyone knows how to do it ?
Get Book data for all Items
Item.objects.all().values(
"book__book_name",
"book__import_price",
# "class_name__field_name", structure of the query
)
To filter Item data using Book fields
[filter Items where book name is 'bookname']
Item.objects.filter(book__book_name="bookname")
My models, category and product. Each product has a category field, which is linked through ForeignKey.
class Category(models.Model):
name = models.CharField(max_length=50, unique=True)
description = models.TextField()
image = models.ImageField(upload_to='category', blank=True)
class Meta:
verbose_name = 'category'
verbose_name_plural = 'categories'
def __str__(self):
return self.name
class Product(models.Model):
name = models.CharField(max_length=50, unique=True)
description = models.TextField()
category = models.ForeignKey(Category, on_delete=models.CASCADE, related_name='category')
price = models.DecimalField(max_digits=10, decimal_places=2)
image = models.ImageField(upload_to='product', blank=True)
stock = models.PositiveIntegerField()
available = models.BooleanField(default=True)
created = models.DateTimeField(auto_now_add=True)
update = models.DateTimeField(auto_now=True)
class Meta:
verbose_name = 'product'
verbose_name_plural = 'products'
def __str__(self):
return self.name
And views, a product category can be selected and when I click on a category, I want the product to appear only in that category
class CategoriesList(LoginRequiredMixin, ListView):
login_url = 'login/'
template_name = 'index.html'
model = Category
class ProductsList(ListView):
template_name = 'products.html'
model = Product
def get_queryset(self):
return super().get_queryset().filter(category=category_id)
I have a cart and subcategory model. I want to fetch the price of the service. How I fetch the price of service in the price field.
I want to fetch price of service in the price field.
Here is my models.py
class SubCategory(models.Model):
name = models.CharField(max_length=254, unique=True)
id_parent = models.ForeignKey(Category, on_delete=models.SET_NULL, null=True)
price = models.IntegerField()
status = models.BooleanField(default=True)
def __str__(self):
return self.name
class Cart(models.Model):
user = models.ForeignKey('accounts.User', related_name="carts", null=True, on_delete=models.SET_NULL)
quantity = models.IntegerField(default=1)
service = models.ForeignKey('accounts.SubCategory',null=True, on_delete=models.SET_NULL)
price = models.ForeignKey('accounts.SubCategory', on_delete=models.CASCADE, default=None, blank=True, related_name='subprice')
date_created = models.DateTimeField(auto_now_add=True)
def __str__(self):
return str(self.price.price)
You would not need to select a value for price since it's derived from the service you selected.
class SubCategory(models.Model):
name = models.CharField(max_length=254, unique=True)
id_parent = models.ForeignKey(Category, on_delete=models.SET_NULL, null=True)
price = models.IntegerField()
status = models.BooleanField(default=True)
def __str__(self):
return self.name
class Cart(models.Model):
user = models.ForeignKey('accounts.User', related_name="carts", null=True, on_delete=models.SET_NULL)
quantity = models.IntegerField(default=1)
service = models.ForeignKey('accounts.SubCategory',null=True, on_delete=models.SET_NULL)
date_created = models.DateTimeField(auto_now_add=True)
def __str__(self):
return str(self.service.price) # if you want just the price of the single service
#property
def total_price(self):
if self.service is not None:
return self.service.price * self.quantity
return 0
service = SubCategory(name="Help with Django", price=5)
aCart = Cart(user=1, quantity=2, service=service)
print(aCart.total_price) # 10
If I understand you clear, you just want to get price of SubCategory attached to Cart. If so, you don't need to add price field to Cart model to get SubCategory price.
You can just define price property on Cart model like this and use it in admin like a regular field:
class Cart(models.Model):
user = models.ForeignKey('accounts.User', related_name="carts", null=True, on_delete=models.SET_NULL)
quantity = models.IntegerField(default=1)
service = models.ForeignKey('accounts.SubCategory',null=True, on_delete=models.SET_NULL)
date_created = models.DateTimeField(auto_now_add=True)
#property
def price(self):
if self.service:
return self.service.price
return None
#property
def total(self):
if self.service:
return self.service.price * self.quantity
return None
def __str__(self):
if self.price:
return str(self.price)
return "Can't show price with no service selected"
How do I add products into a preexisting list? Any guidance would be most appreciated.
I get the following error:
ValueError at /core_lists/test_list/
Cannot assign "": "ListHasProducts.product" must be a "Product" instance.
models.py
class Product(models.Model):
brand = models.CharField(max_length=100)
title = models.CharField(max_length=100)
url = models.URLField()
price = models.DecimalField(max_digits=8, decimal_places=2)
created_at = models.DateTimeField('date published', auto_now_add = True)
updated_at = models.DateTimeField('date updated', auto_now = True)
def __str__(self):
return self.title
class List(models.Model):
name = models.CharField(max_length=50)
description = models.CharField(max_length=100)
category = models.CharField(max_length=50)
created_at = models.DateTimeField('date published', auto_now_add = True)
updated_at = models.DateTimeField('date updated', auto_now = True)
products = models.ManyToManyField(Product, through='ListHasProducts')
def __str__(self):
return self.name
class ListHasProducts(models.Model):
list = models.ForeignKey(List, on_delete=models.CASCADE)
product = models.ForeignKey(Product, on_delete=models.CASCADE)
views.py
def testList(request):
test_form = ProductsForm
if request.method == 'POST':
test_form = ProductsForm(request.POST)
if test_form.is_valid():
test_form.save()
ListHasProducts(list=List.objects.get(pk=13), product=test_form)
ListHasProducts.save()
return HttpResponseRedirect(reverse('core_lists:test_list'))
according to django document
https://docs.djangoproject.com/en/dev/ref/contrib/admin/#working-with-many-to-many-models
you shoud have related_name
class List(models.Model):
name = models.CharField(max_length=50)
description = models.CharField(max_length=100)
category = models.CharField(max_length=50)
products = models.ManyToManyField(Product, related_name='lists')
I am still learning to use Django and so I am a bit unclear on something.
I have a product model and category model. A product can lie in multiple categories and multiple categories can have the same product.
So, its a many to many relationship. Now, I want to allow the user to select multiple categories from the html and then I want to save the categories and link them to the category object in my product model. I am completely lost about it.
One way would be to use Modelform but I dont want to go that way. Is there any other way I can accomplish this?
models.py:
class Category(models.Model):
name = models.CharField(max_length=50)
slug = models.SlugField(max_length=50, unique=True,
help_text='Unique value for product page URL, created from name.')
description = models.TextField()
is_active = models.BooleanField(default=True)
meta_keywords = models.CharField("Meta Keywords", max_length=255,
help_text='Comma-delimited set of SEO keywords for meta tag')
meta_description = models.CharField("Meta Description", max_length=255,
help_text='Content for description meta tag')
created_at = models.DateTimeField(auto_now_add=True)
updated_at = models.DateTimeField(auto_now=True)
def __str__(self):
return self.name
def get_absolute_url(self):
return reverse('catalog:categories', kwargs={'category_slug': self.slug})
class Meta:
ordering = ['-created_at']
verbose_name_plural = 'Categories'
class Product(models.Model):
name = models.CharField(max_length=255, unique=True)
slug = models.SlugField(max_length=255, unique=True,
help_text='Unique value for product page URL, created from name.')
brand = models.CharField(max_length=50)
sku = models.CharField(max_length=50)
price = models.DecimalField(max_digits=9, decimal_places=2)
old_price = models.DecimalField(max_digits=9, decimal_places=2, blank=True, default=0.00)
thumbnail = models.FileField(upload_to='static/images/products/thumbnails')
imageurls = models.CharField(max_length=1000)
is_active = models.BooleanField(default=True)
is_bestseller = models.BooleanField(default=False)
is_featured = models.BooleanField(default=False)
quantity = models.IntegerField()
description = models.TextField()
meta_keywords = models.CharField(max_length=255, help_text='Comma-delimited set of SEO keywords for meta tag')
meta_description = models.CharField(max_length=255, help_text='Content for description meta tag')
created_at = models.DateTimeField(auto_now_add=True)
updated_at = models.DateTimeField(auto_now=True)
categories = models.ManyToManyField(Category)
def __str__(self):
return self.name
def get_absolute_url(self):
return reverse('catalog:products', kwargs={'product_slug': self.slug})
def sale_price(self):
if self.old_price > self.price:
return self.price
else:
return None
class Meta:
ordering = ['-created_at']
part of views.py:
if request.method =='POST':
print ('entered')
name = request.POST['name']
brand = request.POST['brand']
sku = request.POST['sku']
price = request.POST['price']
quantity = request.POST['quantity']
description = request.POST['description']
imageurls = request.POST['urls']
print('imageurls',imageurls)
categorylist = request.POST['categories']
print('categorylist',categorylist)
categories = re.findall(r"[\w']+", categorylist)
print categories
imageurls = imageurls.split('~')
print('iageurls',imageurls)
for x in categories:
categoryobj = Category.objects.filter(name=x).values()
print ('categoryobj',categoryobj)
# Product.objects.create(name=name,sku=sku,brand=brand,price=price,quantity=quantity,description=description,imageurls=imageurls,categories=categoryobj)
return HttpResponse('success')
Try to save the above way gives me error.
product=Product.objects.create(name=name,sku=sku,brand=brand,price=price,quantity=quantity,description=description,imageurls=imageurls)
category_queryset = []
for x in categories:
category = Category.objects.filter(name=x).first()
category_queryset.append(category)
product.categories.set(category_queryset)