Questions tagged [django-annotate]
297 questions
0
votes
1 answer
Invalid distinct with django
I try to get a cars list on my Django project but i'm in trouble with ORM
class Car(models.Model):
name = models.CharField(max_length=200)
owner = models.ForeignKey(User)
With Car.objects.all() I have a list as:
- car#1, user#1
- car#1,…
smorele
- 147
- 12
0
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1 answer
Django annotate single instance of many-2-many field using 'when' on other fields of the instnce
I have a somewhat complicated model, so I will do my best to give an example that simplifies my current state, and my need.
I have a queryset:
qs = MyModel.objects.all()
Each instance in this queryset, has a many-2-many field to another model,…
orizis
- 166
- 2
- 15
0
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2 answers
Django sharing anotations between related Items
Consider a room booking system. You might have a Building, Floor, Room models as well as a Booking. We give the room a name based on its building and floor:
class Room(models.Model):
number = models.PositiveIntegerField()
name =…
Oli
- 235,628
- 64
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- 299
0
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1 answer
Annotate number of identical items in manager
Let's say I have following simplified model:
class CurrentInvoices(models.Manager):
def get_queryset(self):
qs = super(CurrentInvoices, self).get_queryset()
current_invoices = qs.order_by('person',…
SaeX
- 17,240
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0
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1 answer
How to annotate count filtered on datetime?
I've got Categories and Items. The items have an end field (datetime). Now I need to list all categories and display the related item count and the item count of items in the future. As an example:
Cat Foo, 2 items, 1 in the future.
Cat n, n items…
allcaps
- 10,945
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-1
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1 answer
how to take average of every 10 minutes of a model django
I am using multiple APIs and saving them to the database. I have one model called Station (it has a DateTime field and some other fields) and every API is for one station. These APIs come from devices that measure some variables and they get updated…
webdeveloper
- 27
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-1
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1 answer
How to get annotated attributes in a template from a DetailView?
I'm working on a small e-commerce. For a model 'Product' I keep track of the stock using a Custom Manager and a method called Products.objects.with_stock() that uses annotations (I'm required to do so, there's no way I can add a stock attribute in…
gabopushups
- 185
- 2
- 11
-1
votes
1 answer
Annotate + Distinct Not Implemented, Count a Distinct Subquery
I have two models, RetailLocation and Transaction, which share a one-to-many relationship respectively. I trying to annotate the total number of days (Count) a RetailLocation has any number of Transactions for. In doing so, I am filtering the…
hEX90
- 21
- 4
-1
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1 answer
how make a conditions in django annotate?
i'm, trying to do something like this :
c = if x > y return x else return y
inner annotate function
class factura (models.MODEL):
price = Model.integerField(max_length=50, null=False)
articles = Models.charField(Max_length=50, default=0,…
-1
votes
1 answer
Django annotate on float field is not working properly
I'm using Django 2.2
I have the following model structure
class Location(models.Model):
name = models.CharField(max_length=200)
country_name = models.CharField(max_length=200)
latitude = models.FloatField(null=True, blank=True)
longitude =…
Anuj TBE
- 9,198
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- 285
-1
votes
1 answer
Annotate count of related related filtered objects
I have these models:
class Shop(..):
category = ForeignKey...
class Product(..):
shop = ForeignKey...
category = ForeignKey...
is_active = BooleanField...
class Category(..):
name = ...
I need to annotate the number of active…
Milano
- 18,048
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- 353
-1
votes
1 answer
Using related models with conditional expression
Goal: use a related model attribute as a filter inside a conditional expression for an annotation.
I'm currently adding some functionality to an old Django app, this app has some design issues and i have nothing to do with it. After some research I…
