Initial

app/base/models/trait_mapping.py

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+from django.db import models
+from django.urls import reverse
+
+from app.base.forms.fields import DateField
+
+from datetime import date
+from typing import TYPE_CHECKING
+if TYPE_CHECKING:
+    from app.base.models.person import Person
+    from app.base.models.trait import Trait
+
+
+class TraitMapping(models.Model):
+    user: 'models.ForeignKey[Person]' = models.ForeignKey(
+        'Person', on_delete=models.CASCADE, related_name='traits',
+        verbose_name='Werkstattnutzer:in')
+    trait: 'models.ForeignKey[Trait]' = models.ForeignKey(
+        'Trait', on_delete=models.CASCADE, verbose_name='Attribut')
+    valid_from = DateField('Gültig von', default=date.today)
+    valid_until = DateField('Gültig bis', blank=True, null=True)
+
+    class Meta:
+        verbose_name = 'Attributzuweisung'
+        verbose_name_plural = 'Attributzuweisungen'
+
+    def __str__(self):
+        return f'Attribut „{self.trait}“ für {self.user}'
+
+    def get_absolute_url(self):
+        return reverse('trait-mapping:detail', kwargs={'pk': self.pk})