Create DB model and migration for past Pokemon types

pokemon_v2/migrations/0004_pokemontypepast.py

@@ -0,0 +1,27 @@
+# Generated by Django 2.1.2 on 2019-11-30 20:48
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pokemon_v2', '0003_auto_20160530_1132'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='PokemonTypePast',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('slot', models.IntegerField()),
+                ('generation', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, related_name='pokemontypepast', to='pokemon_v2.Generation')),
+                ('pokemon', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, related_name='pokemontypepast', to='pokemon_v2.Pokemon')),
+                ('type', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, related_name='pokemontypepast', to='pokemon_v2.Type')),
+            ],
+            options={
+                'abstract': False,
+            },
+        ),
+    ]

pokemon_v2/models.py

@@ -1480,6 +1480,12 @@ class PokemonType(HasPokemon, HasType):
     slot = models.IntegerField()
 
 
+# model for a Pokemon's types that were used until a given generation
+class PokemonTypePast(HasPokemon, HasType, HasGeneration):
+
+    slot = models.IntegerField()
+
+
 class PokemonSprites(HasPokemon):
 
     sprites = models.CharField(max_length=500)