from django.db import models
class WasteManager(models.Manager):
def get_by_natural_key(self, name):
return self.get(name=name)
[docs]
class Waste(models.Model):
objects = WasteManager()
name = models.CharField(max_length=255)
name_de = models.CharField(max_length=255, null=True)
name_en = models.CharField(max_length=255, null=True)
# emission_factor = models.ForeignKey("EmissionFactor", on_delete=models.SET_NULL, null=True)
[docs]
def natural_key(self):
return (self.name,)
def __str__(self):
return self.name