base unit conversions

cookbook/migrations/0194_unit_base_unit.py

@@ -0,0 +1,18 @@
+# Generated by Django 4.1.7 on 2023-03-15 14:57
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('cookbook', '0193_alter_unitconversion_base_unit_and_more'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='unit',
+            name='base_unit',
+            field=models.TextField(blank=True, default=None, max_length=256, null=True),
+        ),
+    ]