#models.py
class Item(models.Model):
parte = models.ForeignKey('Parte')
cantidad = models.PositiveIntegerField()
class Parte(models.Model):
num_parte = models.CharField(max_length=14, primary_key=True)
descripcion = models.CharField(max_length=40, blank=True)
class Item_Carrito(models.Model):
item = models.ForeignKey('Item')
carrito = models.ForeignKey('Carrito')
class Meta:
unique_together = ('carrito', 'item')
class Carrito(models.Model):
cliente = models.ForeignKey('Cliente', unique=True)
I have the restriction that the same part (Parte) cannot be related
more than once with a "Carrito" instance.
I think that could easily be solved using:
class Meta:
unique_together=('carrito', 'item.parte')
In the Item_Carrito Model.
However, I can't use 'item.parte' as django gives me an error that I'm
referring to a field that doesnt' exist.
Is there a way I can use a field of another object in unique_together?
Thank you,
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