How to display in OrderAdmin: Basket owner, products, quantity of products?
I try Inline:
admin.py:
class BasketInline(admin.TabularInline):
model = Basket
class OrderAdmin(admin.ModelAdmin):
inlines = [
BasketInline,
]
admin.site.register(Order, OrderAdmin)
but it does not work.
class Basket(models.Model):
owner = models.ForeignKey(User, related_name='user_basket', verbose_name='Owner')
name = models.CharField("Basket_Name", max_length=30)
products = models.ManyToManyField('Product', through='BasketProduct', blank=True, null=True)
class BasketProduct(models.Model):
product = models.ForeignKey('Product')
basket = models.ForeignKey('Basket')
quantity = models.IntegerField()
class Product(models.Model):
name = models.CharField(max_length=50)
slug = models.SlugField()
unit_price = models.DecimalField(max_digits=5, decimal_places=2)
desc = models.TextField()
category = models.ManyToManyField(Category)
class ShippingOptions(models.Model):
name = models.CharField(max_length=50)
price = models.DecimalField(max_digits=5, decimal_places=2)
time = models.CharField(max_length=150)
class Order(models.Model):
bask = models.OneToOneField(Basket)
shipp = models.OneToOneField(ShippingOptions)
Maybe I need a different way. Please any help. Thanks
You need foreignKey on Order in you Basket model:
class Basket(models.Model):
owner = models.ForeignKey(User, related_name='user_basket', verbose_name='Owner')
name = models.CharField("Basket_Name", max_length=30)
products = models.ManyToManyField('Product', through='BasketProduct', blank=True, null=True)
owner = models.ForeignKey(Owner, blank=True, verbose_name='Owner')
or you have error in first model row:
owner = models.ForeignKey(Owner, related_name='user_basket', verbose_name='Owner')
Related
I am getting alot of duplicates in my template when i try to call the calculated loan payments in templates.
My models:
class Client(models.Model):
full_name = models.CharField(max_length=200,blank=True) staff=models.ForeignKey(settings.AUTH_USER_MODEL,on_delete=models.SET_NULL,null=True,blank=True,related_name="client")
date = models.DateTimeField(default=timezone.now)
class Loan(models.Model):
ref = ShortUUIDField(length=6,max_length=6,alphabet="ABCDZXFQFHKRKL0123456789",unique=True)
loan_amount = models.IntegerField(blank=True,null=True)
staff=models.ForeignKey(settings.AUTH_USER_MODEL,on_delete=models.SET_NULL,null=True,blank=True,related_name="loans")
search_client=models.ForeignKey(Client,on_delete=models.SET_NULL,null=True,blank=True)
#cached_property
def loan_repayments(self):
myfilter = Loan.objects.filter(ref=self.ref,payment__payment_reason='loan repayment')
result=myfilter.aggregate(total=Sum(F('payment__amount')))
total = result['total']
if total is None:
return 0
return total
class Payment(models.Model):
ref = ShortUUIDField(length=6,max_length=6,alphabet="ABCDZXFQFHKRKL0123456789",unique=True)
payment_reason = models.CharField(max_length=200, null=True, blank=True,choices=PAYMENT_REASON,default='loan repayment',db_index=True)
amount = models.IntegerField(blank=True, null=True)
lender = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.SET_NULL,
blank=True, null=True, related_name="payments")
loan = models.ForeignKey(Loan, on_delete=models.CASCADE,
blank=True, null=True)
my view:
class Loan(LoginRequiredMixin,ListView):
query_set =Loan.objects.filter(status="active",action="creating loan").select_related('staff','search_client')
context_object_name = 'transactions'
paginate_by = 15
my template:
duplicates am getting:
duplicates in the toolbar
Query
TechnicianAssignment.objects.filter(Q(slot__slot_date=curr_datetime.date())&Q(assigned_technician__attendance_Technician__attendance_status__in=['Rejected', 'Absent', 'Someone else reported', 'Present']))
Models in short:
**Table 1**:
class TechnicianTeam(models.Model):
id = models.AutoField(primary_key=True)
supervisor = models.ForeignKey('self', null=True, blank=True, related_name="TechnicianSupervisor", on_delete=models.DO_NOTHING)
customer_profile = models.ForeignKey('login.CustomerProfile',
related_name="technician_TeamUser", on_delete=models.DO_NOTHING)
class Meta:
db_table = "technician_team"
**Table2:**
class TechnicianAssignment(models.Model):
id = models.AutoField(primary_key=True)
slot = models.ForeignKey('technician_management.TechnicianSlot',
related_name="assignment_Slot", on_delete=models.DO_NOTHING)
assigned_technician = models.ForeignKey('technician_management.TechnicianTeam',
related_name="assignment_Technician", on_delete=models.DO_NOTHING)
class Meta:
db_table = "technician_assignment"
**Table3**
ATTENDANCE_CHOICES = [
('Rejected','Rejected'),
('Someone else reported','Someone else reported'),
('Absent','Absent'),
('Present','Present')
]
class TechnicianAttendance(models.Model):
id = models.AutoField(primary_key=True)
technician = models.ForeignKey('technician_management.TechnicianTeam',
related_name="attendance_Technician", on_delete=models.DO_NOTHING)
slot = models.ForeignKey('technician_management.TechnicianSlot',
related_name="attendance_Slot", on_delete=models.DO_NOTHING)
attendance_status = models.CharField(max_length=30, choices=ATTENDANCE_CHOICES, null=True)
class Meta:
db_table = "technician_attendance"
Question what is wrong with my query:
I need to filter out from TechnicianAssignment where in entries were "slot__slot_date" is current date and "__attendance_Technician__attendance_status__in" = ['Rejected', 'Absent', 'Someone else reported', 'Present']
there is only 1 entry in db with attendance status 'Present' but i am getting many output because of "__attendance_Technician__attendance_status__in" this filter.
I realize that the 3 models that I use right now have a ton of shared fields. I was wondering what the best way to condense these models would be. I've read some articles on metaclasses and model inheritance but wanted to see what the "best" way to do this would be.
models.py
class Car(models.Model):
created = models.DateTimeField(auto_now_add=True)
make = models.CharField(max_length=100)
model = models.CharField(max_length=100)
year = models.IntegerField(default=2021, validators=[MinValueValidator(1886), MaxValueValidator(datetime.now().year)])
seats = models.PositiveSmallIntegerField()
color = models.CharField(max_length=100)
VIN = models.CharField(max_length=17, validators=[MinLengthValidator(11)])
current_mileage = models.PositiveSmallIntegerField()
service_interval = models.CharField(max_length=50)
next_service = models.CharField(max_length=50)
class Truck(models.Model):
created = models.DateTimeField(auto_now_add=True)
make = models.CharField(max_length=100)
model = models.CharField(max_length=100)
year = models.IntegerField(default=datetime.now().year, validators=[MinValueValidator(1886), MaxValueValidator(datetime.now().year)])
seats = models.PositiveSmallIntegerField()
bed_length = models.CharField(max_length=100)
color = models.CharField(max_length=100)
VIN = models.CharField(max_length=17, validators=[MinLengthValidator(11)])
current_mileage = models.PositiveSmallIntegerField()
service_interval = models.CharField(max_length=50)
next_service = models.CharField(max_length=50)
class Boat(models.Model):
created = models.DateTimeField(auto_now_add=True)
make = models.CharField(max_length=100)
model = models.CharField(max_length=100)
year = models.PositiveSmallIntegerField(default=datetime.now().year, validators=[MaxValueValidator(datetime.now().year)])
length = models.CharField(max_length=100)
width = models.CharField(max_length=100)
HIN = models.CharField(max_length=14, validators=[MinLengthValidator(12)], blank=True)
current_hours = models.PositiveSmallIntegerField()
service_interval = models.CharField(max_length=50)
next_service = models.CharField(max_length=50)
I can notice that some fields are similar but aren't the same, for example year are not the same for all. Due to that I propose to you the following.
class TimeStampedModel(models.Model):
created = models.DateTimeField(auto_now_add=True)
modified = models.DateTimeField(auto_now=True)
class Meta:
abstract = True
class Vehicule(TimeStampedModel):
make = models.CharField(max_length=100)
model = models.CharField(max_length=100)
service_interval = models.CharField(max_length=50)
next_service = models.CharField(max_length=50)
class Meta:
abstract = True
class WheeledVehicle(Vehicule):
seats = models.PositiveSmallIntegerField()
color = models.CharField(max_length=100)
VIN = models.CharField(max_length=17, validators=[MinLengthValidator(11)])
current_mileage = models.PositiveSmallIntegerField()
class Meta:
abstract = True
class Car(WheeledVehicle):
year = models.IntegerField(default=2021, validators=[MinValueValidator(1886), MaxValueValidator(datetime.now().year)])
class Truck(WheeledVehicle):
year = models.IntegerField(default=datetime.now().year, validators=[MinValueValidator(1886), MaxValueValidator(datetime.now().year)])
bed_length = models.CharField(max_length=100)
class Boat(Vehicule):
year = models.PositiveSmallIntegerField(default=datetime.now().year, validators=[MaxValueValidator(datetime.now().year)])
length = models.CharField(max_length=100)
width = models.CharField(max_length=100)
HIN = models.CharField(max_length=14, validators=[MinLengthValidator(12)], blank=True)
current_hours = models.PositiveSmallIntegerField()
And if you want to go further, I suggest you to add created_by and modified_by fields to audit.
class TimeStampedModel(models.Model):
created = models.DateTimeField(auto_now_add=True)
modified = models.DateTimeField(auto_now=True)
class Meta:
abstract = True
class TimeStampedAuthModel(TimeStampedModel):
created_by = models.ForeignKey(settings.AUTH_USER_MODEL, null=True, on_delete=models.SET_NULL,
related_name="%(app_label)s_%(class)s_created_by")
modified_by = models.ForeignKey(settings.AUTH_USER_MODEL, null=True, on_delete=models.SET_NULL,
related_name="%(app_label)s_%(class)s_modified_by")
class Meta:
abstract = True
class Vehicule(TimeStampedAuthModel):
make = models.CharField(max_length=100)
model = models.CharField(max_length=100)
service_interval = models.CharField(max_length=50)
next_service = models.CharField(max_length=50)
class Meta:
abstract = True
class WheeledVehicle(Vehicule):
seats = models.PositiveSmallIntegerField()
color = models.CharField(max_length=100)
VIN = models.CharField(max_length=17, validators=[MinLengthValidator(11)])
current_mileage = models.PositiveSmallIntegerField()
class Meta:
abstract = True
class Car(WheeledVehicle):
year = models.IntegerField(default=2021, validators=[MinValueValidator(1886), MaxValueValidator(datetime.now().year)])
class Truck(WheeledVehicle):
year = models.IntegerField(default=datetime.now().year, validators=[MinValueValidator(1886), MaxValueValidator(datetime.now().year)])
bed_length = models.CharField(max_length=100)
class Boat(Vehicule):
year = models.PositiveSmallIntegerField(default=datetime.now().year, validators=[MaxValueValidator(datetime.now().year)])
length = models.CharField(max_length=100)
width = models.CharField(max_length=100)
HIN = models.CharField(max_length=14, validators=[MinLengthValidator(12)], blank=True)
current_hours = models.PositiveSmallIntegerField()
You can use model inheritance or model Mixins
model inheritance with abstract base model:
class AbstractVehicle(models.Model):
created = models.DateTimeField(auto_now_add=True)
make = models.CharField(max_length=100)
model = models.CharField(max_length=100)
year = models.IntegerField(default=2021, validators=[MinValueValidator(1886), MaxValueValidator(datetime.now().year)])
class Meta:
abstract = True
class Car(AbstractVehicle):
seats = models.PositiveSmallIntegerField()
color = models.CharField(max_length=100)
VIN = models.CharField(max_length=17, validators=[MinLengthValidator(11)])
current_mileage = models.PositiveSmallIntegerField()
service_interval = models.CharField(max_length=50)
next_service = models.CharField(max_length=50)
class Truck(AbstractVehicle):
seats = models.PositiveSmallIntegerField()
bed_length = models.CharField(max_length=100)
color = models.CharField(max_length=100)
VIN = models.CharField(max_length=17, validators=[MinLengthValidator(11)])
current_mileage = models.PositiveSmallIntegerField()
service_interval = models.CharField(max_length=50)
next_service = models.CharField(max_length=50)
class Boat(AbstractVehicle):
length = models.CharField(max_length=100)
width = models.CharField(max_length=100)
HIN = models.CharField(max_length=14, validators=[MinLengthValidator(12)], blank=True)
current_hours = models.PositiveSmallIntegerField()
service_interval = models.CharField(max_length=50)
next_service = models.CharField(max_length=50)
model mixins:
class VehicleMixin(object):
created = models.DateTimeField(auto_now_add=True)
make = models.CharField(max_length=100)
model = models.CharField(max_length=100)
year = models.IntegerField(default=2021, validators=[MinValueValidator(1886), MaxValueValidator(datetime.now().year)])
class Car(VehicleMixin, models.Model):
seats = models.PositiveSmallIntegerField()
color = models.CharField(max_length=100)
VIN = models.CharField(max_length=17, validators=[MinLengthValidator(11)])
current_mileage = models.PositiveSmallIntegerField()
service_interval = models.CharField(max_length=50)
next_service = models.CharField(max_length=50)
class Truck(VehicleMixin, models.Model):
seats = models.PositiveSmallIntegerField()
bed_length = models.CharField(max_length=100)
color = models.CharField(max_length=100)
VIN = models.CharField(max_length=17, validators=[MinLengthValidator(11)])
current_mileage = models.PositiveSmallIntegerField()
service_interval = models.CharField(max_length=50)
next_service = models.CharField(max_length=50)
class Boat(VehicleMixin, models.Model):
length = models.CharField(max_length=100)
width = models.CharField(max_length=100)
HIN = models.CharField(max_length=14, validators=[MinLengthValidator(12)], blank=True)
current_hours = models.PositiveSmallIntegerField()
service_interval = models.CharField(max_length=50)
next_service = models.CharField(max_length=50)
Both of these solutions will leave you with the same tables as your code. Also these are just simple examples. You may be able to improve them further. For Example you could add even more mixins or abstract base classes that contain the other fields.
You can combine the model by creating Vehicle and VehicleType in vehicle model you keep all common vehicle fields, in VehicleType keep the car, truck,boat etc with foreign-key reference to Vehicle model.
class VehicleType(models.Model):
name = models.CharField(max_length=100, unique=True)
created = models.DateTimeField(auto_now_add=True)
class Vehicle(models.Model):
vehicle_type = models.Foreinkey(VehicleType, on_delete=model.CASCADE)
created = models.DateTimeField(auto_now_add=True)
make = models.CharField(max_length=100)
model = models.CharField(max_length=100)
year = models.IntegerField(default=datetime.now().year, validators=[MinValueValidator(1886), MaxValueValidator(datetime.now().year)])
seats = models.PositiveSmallIntegerField()
bed_length = models.CharField(max_length=100)
color = models.CharField(max_length=100)
VIN = models.CharField(max_length=17, validators=[MinLengthValidator(11)])
current_mileage = models.PositiveSmallIntegerField()
service_interval = models.CharField(max_length=50)
next_service = models.CharField(max_length=50)
I have the code which calculates the sum just fine, now my question is it possible to multiple each price by quantity and then get the total sum after that in a cart on my website. I have tried with all of my logic but i have failed. The idea is to get the price of an item added to cart and multiply it by quantity and then get the total.
Here is my cart mode. models.py:
#cart model
class Cart(models.Model):
item = models.ForeignKey(Item, on_delete=models.CASCADE)
number_of_items = models.IntegerField(default=0)
user = models.ForeignKey(User, on_delete=models.CASCADE)
added_datetime = models.DateTimeField(auto_now_add=True)
def __str__(self):
return self.item.name
#Item model
class Item(models.Model):
CONDITION = (
('new', 'new'),
('used', 'used'),
('not applicable', 'not applicable'),
)
name = models.CharField(max_length=250)
owner = models.CharField(max_length=250, default='Ludocs-emark')
category = models.ForeignKey(ItemCategories, on_delete=models.CASCADE)
sub_category = models.ForeignKey(SubCategory, on_delete=models.CASCADE)
tag = models.ForeignKey(Tag, on_delete=models.CASCADE)
Condition = models.CharField(max_length=250, null=True, choices=CONDITION)
price= models.IntegerField(default=0)
number_of_items = models.IntegerField(blank=True)
specification_one = models.CharField(max_length=250, blank=True)
specification_two = models.CharField(max_length=250, blank=True)
specification_three = models.CharField(max_length=250, blank=True)
specification_four = models.CharField(max_length=250, blank=True)
specification_five = models.CharField(max_length=250, blank=True)
specification_six = models.CharField(max_length=250, blank=True)
available_colors = models.CharField(max_length=250, blank=True)
description = RichTextField()
thumbnail = models.ImageField(default='default.png', upload_to='images/')
image_one = models.ImageField(upload_to='images/')
image_two = models.ImageField(upload_to='images/')
image_three = models.ImageField(upload_to='images/')
image_four = models.ImageField(upload_to='images/')
added_date = models.DateTimeField(auto_now_add=True)
def __str__(self):
return self.name
views.py file that i used to calculate the sum:
#This is the file where that i want to use to get the items added in cart and then multiply each by it's quantity and then get the total of the calculations when multiplied.
cart_sum = Cart.objects.filter(user=request.user).aggregate(Sum('item__price')).get('item__price__sum')
Yes, You can do that.
Try this
cart_sum = Cart.objects.filter(user=request.user).aggregate(Sum('item__price', field='item__price * number_of_items')).get('item__price__sum')
Assuming number_of_items as the quantity for the item from the Cart model.
Also you can return a total value so that if this gives any error for two different fields then you can do this
cart_sum = Cart.objects.filter(user=request.user).aggregate(total_price=Sum('item__price', field='item__price * number_of_items')).get('total_price')
I have the following constellation of Tables, which are linked via FK's:
(omitted a few fields for better readability)
class ProductDetail(models.Model):
product = models.ForeignKey(Product, on_delete=models.CASCADE)
product_detail = models.CharField(max_length=100, primary_key=True, verbose_name='Product Detail Name')
materialcode = models.CharField(max_length=20, blank=False, null=False, verbose_name='Material-Code')
billing_model = models.ForeignKey(BillingModel, on_delete=models.CASCADE)
....
--------------
class MinimumRevenue(models.Model):
operator = models.ForeignKey(Operator, on_delete=models.CASCADE)
billing_model = models.ForeignKey(BillingModel, on_delete=models.CASCADE)
minimum_revenue = models.DecimalField(decimal_places=2, max_digits=20, verbose_name='Minimum Revenue')
currency = models.ForeignKey(Currency, on_delete=models.CASCADE)
product_detail = models.ForeignKey(ProductDetail, on_delete=models.CASCADE, verbose_name='Product Detail')
event_type_assignment = models.CharField(max_length=100, verbose_name='Event Type Assignment')
start_date = models.DateField(blank=False, null=False, verbose_name='Start Date', default=get_first_of_month)
end_date = models.DateField(blank=False, null=False, verbose_name='End Date')
....
And a Table (Django_Tables2) which points to the MinimumRevenue Model (which works as designed), now I would like to also show some more related fields in my Table:
class MinimumRevenueTable(tables.Table):
edit = tables.LinkColumn('non_voice:minimum_revenue_update', orderable=False, text='Edit', args=[A('pk')])
invoice_text = tables.TemplateColumn(
'<data-toggle="tooltip" title="{{record.context}}">{{record.invoice_text|truncatewords:2}}')
start_date = tables.DateColumn(format='Y-m-d')
end_date = tables.DateColumn(format='Y-m-d')
foreigncolumn = tables.Column(accessor='productdetail.materialcode')
class Meta:
model = MinimumRevenue
template_name = "django_tables2/bootstrap4.html"
fields = ('operator', 'billing_model', 'minimum_revenue', 'product', 'product_detail', 'event_type_assignment',
'start_date', 'end_date', 'invoice_text', 'currency', 'foreigncolumn')
attrs = {'class': 'table table-hover', }
The foreigncolumn column is never filled, just showing '-', I also tried it with other columns of ProductDetail, but never get any result, would really appreciate any solutions!