basics of ingredient unit normalization

cookbook/migrations/0010_auto_20200130_1059.py

@@ -0,0 +1,28 @@
+# Generated by Django 3.0.2 on 2020-01-30 09:59
+
+from django.db import migrations
+
+
+def migrate_ingredient_units(apps, schema_editor):
+    Unit = apps.get_model('cookbook', 'Unit')
+    RecipeIngredients = apps.get_model('cookbook', 'RecipeIngredients')
+
+    for u in RecipeIngredients.objects.values('unit').distinct():
+        unit = Unit()
+        unit.name = u['unit']
+        unit.save()
+
+    for i in RecipeIngredients.objects.all():
+        i.unit_key = Unit.objects.get(name=i.unit)
+        i.save()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('cookbook', '0009_auto_20200130_1056'),
+    ]
+
+    operations = [
+        migrations.RunPython(migrate_ingredient_units),
+    ]