On Tuesday, February 21, 2017 at 10:16:04 PM UTC-3, Melvyn Sopacua wrote:
While the testcase is simple, it is not the simplest test :)
Two things come to mind:
- If you get rid of the Sum(), does it work then?
- Saving the model with the base_manager_name should not use that manager as related manager. It is only used when a model with a foreign key to ProdutoServico is saved.
In your original exception, it looks like ProdutoServico extends a model in sumario.models and both override the save method:
/home/eltonplima/ssd/
repository/planonegocios/ marketing/models.py in save super().save(*args, **kwargs) ...
▶ Local vars
/home/eltonplima/ssd/
repository/planonegocios/ sumario/models.py in save super().save(*args, **kwargs) ...
Is it possible your problem is in one of those two?
On Tuesday 21 February 2017 16:37:12 eltonplima wrote:
> This is part of my real code but demonstrate the issue in pratice:
>
> from django.db import models
>
> class ProdutoServicoManager(models.
Manager): > def get_queryset(self):
> custo_unitario = models.F('custounitario__
valor') > quantidade = models.F('custounitario__
quantidade') > expression = models.Sum(custo_unitario * quantidade)
> custo_producao_expr = models.ExpressionWrapper(
expression, >
> output_field=models.
DecimalField()) > return
> super().get_queryset().
annotate(custo_producao=custo_ producao_expr) >
>
> class ProdutoServico(models.Model):
> produto = models.BooleanField(default=
True) > descricao = models.TextField()
> objects = ProdutoServicoManager()
>
> class Meta:
> ##############################
################### > # Comment the line below and the test pass.
> ##############################
################### > base_manager_name = 'objects'
>
>
> class CustoUnitario(models.Model):
> produto_servico = models.ForeignKey(
ProdutoServico) > item = models.CharField(max_length=
128) > quantidade = models.PositiveIntegerField()
> valor = models.DecimalField(max_
digits=10, > decimal_places=4,
> verbose_name='Valor unitário')
>
>
> class Faturamento(models.Model):
> produto_servico = models.OneToOneField(
ProdutoServico) > quantidade = models.PositiveIntegerField()
> preco_unitario = models.DecimalField(max_
digits=10, > decimal_places=2)
>
> # We need only a single simple test to demonstrate this issue.
>
> from django.test import TestCase
> from django.db import utils
>
> from model_mommy import mommy
>
> from core import models
>
> class FaturamentoTest(TestCase):
>
> def test(self):
> faturamento = mommy.make(models.Faturamento)
> produto = faturamento.produto_servico
> try:
> produto.save()
> except utils.OperationalError:
> self.fail("Whats wrong?")
>
> On Tuesday, February 21, 2017 at 9:01:50 AM UTC-3, Melvyn Sopacua wrote:
> > On Monday 20 February 2017 17:09:40 eltonplima wrote:
> > > Base class is abstract.
> > >
> > >
> > >
> > > class Base(models.Model):
> > >
> > > plano = models.ForeignKey(Plano)
> > >
> > >
> > >
> > >
> > >
> > > class Meta:
> > >
> > > abstract = True
> > >
> > >
> > >
> > >
> > >
> > > base_manager_name
> > >
> > > <https://docs.djangoproject.
com/en/1.10/ref/models/ options/#base-m > > > anag
> > >
> > > er-name>
> >
> > Ack, my brain kept reading "default_manager_name".
> >
> > Still - without a ForeignKey this shouldn't break anything. It seems
> > it warrents a new bug report, but I'm curious where things break.
> > It looks like this model is used as an inline in the admin. Is that
> > correct?
> >
> >
> >
> > I cannot reproduce this with a simple test case:
> >
> >
> >
> > models:
> >
> > class CartEntryManager(models.
Manager): > > def get_queryset(self):
> > qs = super(CartEntryManager, self).get_queryset()
> > expression = models.F('quantity') * models.F('price')
> > wrapped = models.ExpressionWrapper(
expression, > > output_field=models.
DecimalField( > > max_digits=20, decimal_places=2))
> > return qs.annotate(amount=wrapped)
> >
> >
> > class Cart(models.Model):
> > created = models.DateTimeField(auto_now_
add=True) > >
> >
> > class CartEntry(models.Model):
> > item = models.CharField(max_length=
32, primary_key=True) > > quantity = models.
PositiveSmallIntegerField() > > price = models.DecimalField(max_
digits=20, decimal_places=2) > > cart = models.ForeignKey(Cart, on_delete=models.CASCADE,
> > related_name='items')
> > is_shipped = models.BooleanField(default=
False) > > objects = CartEntryManager()
> >
> > class Meta:
> > base_manager_name = 'objects'
> >
> > tests:
> >
> > class CartTest(TestCase):
> > @classmethod
> > def setUpTestData(cls):
> > cart = models.Cart()
> > cart.save()
> > keyboard = models.CartEntry(
> > item='Komplete Kontrol S88',
> > quantity=2,
> > price='999.00',
> > cart=cart
> > )
> > mixer = models.CartEntry(
> > item='Traktor Kontrol S8',
> > quantity=1,
> > price='1199.00',
> > cart=cart
> > )
> > keyboard.save()
> > mixer.save()
> > cls.cart = cart
> > cls.keyboard = keyboard
> > cls.mixer = mixer
> >
> > def test_entry_annotation(self):
> > self.assertEqual(self.
keyboard.amount, 1998) > >
> > def test_base_manager(self):
> > from decimal import Decimal
> > total = Decimal('0.00')
> > for item in self.cart.items.all():
> > total += item.amount
> >
> > total = total.quantize(Decimal('0.01')
) > > expect = Decimal('3197.00').quantize(
Decimal('0.01')) > > self.assertEqual(total, expect)
> >
> > def test_base_manager_update(self)
: > > self.cart.items.update(is_
shipped=True) > > shipped = self.cart.items.filter(is_
shipped=True).count() > > self.assertEqual(shipped, 2)
> >
> > > On Saturday, February 18, 2017 at 9:20:03 PM UTC-3, Melvyn Sopacua wrote:
> > > > On Saturday 18 February 2017 22:27:46 Elton Pereira wrote:
> > > > > class ProdutoServicoManager(models.
Manager): > > > > >
> > > > >
> > > > >
> > > > > def get_queryset(self):
> > > > >
> > > > >
> > > > >
> > > > > expression = models.Sum(models.F('
custounitario__valor') * > > > > >
> > > > >
> > > > >
> > > > > models.F('custounitario__
quantidade')) > > > > >
> > > > >
> > > > >
> > > > > total_expr = models.ExpressionWrapper(
expression, > > > > >
> > > > >
> > > > >
> > > > > output_field=models.
DecimalField()) > > > > >
> > > > >
> > > > >
> > > > > return
> > > > >
> > > > >
> > > > >
> > > > > super().get_queryset().
annotate(custo_producao=total_ expr) > > > >
> > > > > class ProdutoServico(Base):
> > > > What's the manager on Base?
> > > >
> > > > > produto = models.BooleanField(default=
True) > > > > >
> > > > >
> > > > >
> > > > > descricao = models.TextField()
> > > > >
> > > > >
> > > > >
> > > > > objects = ProdutoServicoManager()
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > class Meta:
> > > > >
> > > > >
> > > > >
> > > > > base_manager_name = 'objects'
> > > >
> > > > Cause this doesn't actually do anything, beside being explicit.
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > Melvyn Sopacua
> >
> > Melvyn Sopacua
--
Melvyn Sopacua
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