teilchensammler/collector/models.py

from django.db import models
from django_extensions.db.models import ModificationDateTimeField


class Teil(models.Model):
    name = models.TextField("Name of the part", null=False, blank=False)
    modified = ModificationDateTimeField("last changed")

    class Meta:
        constraints = [
            models.UniqueConstraint(fields=["name"], name="unique_names"),
        ]
        indexes = [
            models.Index(fields=["modified"], name="idx_modified"),
        ]

        verbose_name = "Teil"
        verbose_name_plural = "Teile"
        ordering = ["-modified"]

    def __str__(self) -> str:
        modified = self.modified.isoformat(timespec="seconds")
        return f"{self.name} (last change: {modified})"