Add mother_range dependency

app/migrations/0020_alter_range_mother_range.py

@@ -0,0 +1,19 @@
+# Generated by Django 3.2.5 on 2021-11-25 05:34
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('app', '0019_auto_20211125_0509'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='range',
+            name='mother_range',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.DO_NOTHING, to='app.range'),
+        ),
+    ]

app/models.py

@@ -79,7 +79,7 @@ class Range(models.Model):
     range_name = models.TextField(blank=True, null=True)
     range_name_ascii = models.TextField(blank=True, null=True)
     range_name_language = models.ForeignKey(Language, models.DO_NOTHING, blank=True, null=True, to_field='id')
-    mother_range = models.TextField(blank=True, null=True)
+    mother_range = models.ForeignKey("self", models.DO_NOTHING, blank=True, null=True, to_field='id')
     feature = models.TextField(blank=True, null=True)  # TODO needs to be a drop down
     map_unit = models.TextField(blank=True, null=True)
     level = models.TextField(blank=True, null=True)