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- class Categoria(models.Model):
- nombre = models.CharField(max_length=50)
- def __str__(self):
- return self.nombre
- class Proveedor(models.Model):
- razon_social = models.CharField(max_length=100, unique=True)
- ...
- categoria = models.ManyToManyField(Categoria)
- def __unicode__(self):
- return self.razon_social
- for proveedor in Proveedor.objects.all().filter(estado=1):
- ...
- ws.cell(row=cont, column=8).value = proveedor.categoria.all.join(", ")
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