Modify models for new zone selection method

backend/right_tree/api/migrations/0010_auto_20211201_2155.py

@@ -0,0 +1,27 @@
+# Generated by Django 3.2.8 on 2021-12-01 21:55
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('api', '0009_alter_plant_options'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='zone',
+            name='habitat',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, related_name='zones', to='api.habitat'),
+        ),
+        migrations.AddField(
+            model_name='zone',
+            name='related_svg_segment',
+            field=models.CharField(blank=True, max_length=20, null=True),
+        ),
+        migrations.DeleteModel(
+            name='ZoneImageSegment',
+        ),
+    ]