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',
+        ),
+    ]

backend/right_tree/api/models.py

@@ -80,8 +80,11 @@ class Zone(models.Model):
     name = models.CharField(max_length=50)
     variant = models.CharField(null=True, blank=True, max_length=50)
     refined_variant = models.CharField(null=True, blank=True, max_length=100)
+    habitat = models.ForeignKey(
+        Habitat, blank=True, null=True, on_delete=models.CASCADE,  related_name='zones')
     redirect_habitat = models.ForeignKey(
         Habitat, blank=True, null=True, on_delete=models.CASCADE,  related_name='zone_redirects')
+    related_svg_segment = models.CharField(null=True, blank=True, max_length=20)
     ignore_soil_order_filter = models.BooleanField(default=False)
     ignore_location_filter = models.BooleanField(default=False)
 
@@ -94,21 +97,6 @@ class Zone(models.Model):
         ordering = ['name', 'variant', 'refined_variant', 'id']
 
 
-class ZoneImageSegment(models.Model):
-    zone = models.ForeignKey(
-        Zone, on_delete=models.CASCADE,  related_name='image_segments')
-    habitat_image = models.ForeignKey(
-        HabitatImage, on_delete=models.CASCADE,  related_name='image_segments')
-    segment_order = models.PositiveIntegerField(default=0)
-    segment_percentage_width = models.FloatField(default=0)
-
-    def __str__(self):
-        return f"{self.habitat_image.name}, {self.zone}"
-
-    class Meta:
-        ordering = ['segment_order', 'id']
-
-
 class Plant(models.Model):
     name = models.CharField(unique=True, max_length=50)
     commonname = models.CharField(null=True, blank=True, max_length=200)