[models] move Models into their own module

src/teilchensammler_cli/models.py

@@ -0,0 +1,38 @@
+from typing import final
+
+from tortoise import Model, fields
+
+
+@final
+class Teilchen(Model):
+    name = fields.TextField()
+    description = fields.TextField()
+    number = fields.IntField()  # validate values >= 0
+
+    created_at = fields.DatetimeField(auto_now_add=True)
+    modified_at = fields.DatetimeField(auto_now=True)
+
+    tags = fields.ManyToManyField(
+        "models.Tag",
+        through="models.TeilchenTag",
+        related_name="teilchen",
+        forward_key="tag_id",
+        backward_key="teilchen_id",
+    )
+
+
+@final
+class Tag(Model):
+    name = fields.CharField(max_length=20)
+
+    created_at = fields.DatetimeField(auto_now_add=True)
+    modified_at = fields.DatetimeField(auto_now=True)
+
+
+@final
+class TeilchenTag(Model):
+    teilchen: fields.ForeignKeyRelation[Teilchen] = fields.ForeignKeyField(
+        "models.Teilchen"
+    )
+    tag: fields.ForeignKeyRelation[Tag] = fields.ForeignKeyField("models.Tag")
+    weight = fields.IntField()