Pastebin


class ProjectCode(models.Model):
    code = models.CharField(max_length=200, unique=True, db_index=True)

    project = models.ForeignKey(Project, on_delete=models.PROTECT)
    active = models.BooleanField(default=True)
    rate = models.DecimalField(blank=True, null=True, max_digits=10, decimal_places=2)
    max_hours = models.IntegerField(blank=True, null=True)
    date_start = models.DateField(blank=True, null=True)
    date_end = models.DateField(blank=True, null=True)

    created_on = models.DateTimeField(auto_now_add=True)
    updated_on = models.DateTimeField(auto_now=True)

    def get_code_default(self) -> str:
        return f"{self.project.customer.id}-{self.project.id}-{self.id}"


    def save(self, *args, **kwargs):
        if not self.code:
            self.code = self.get_code_default():

            return super().save(*args, **kwargs)