Added dependency django-polymorphic

Model change to take advantage of said polymorphism
Implemented asset search

assets/migrations/0008_auto_20191002_1931.py

@@ -0,0 +1,98 @@
+# Generated by Django 2.0.13 on 2019-10-02 18:31
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('contenttypes', '0002_remove_content_type_name'),
+        ('assets', '0007_auto_20190108_0202'),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name='asset',
+            options={'base_manager_name': 'objects'},
+        ),
+        migrations.AlterModelOptions(
+            name='cable',
+            options={'base_manager_name': 'objects'},
+        ),
+        migrations.RemoveField(
+            model_name='asset',
+            name='length',
+        ),
+        migrations.RemoveField(
+            model_name='cable',
+            name='asset_id',
+        ),
+        migrations.RemoveField(
+            model_name='cable',
+            name='category',
+        ),
+        migrations.RemoveField(
+            model_name='cable',
+            name='comments',
+        ),
+        migrations.RemoveField(
+            model_name='cable',
+            name='date_acquired',
+        ),
+        migrations.RemoveField(
+            model_name='cable',
+            name='date_sold',
+        ),
+        migrations.RemoveField(
+            model_name='cable',
+            name='description',
+        ),
+        migrations.RemoveField(
+            model_name='cable',
+            name='id',
+        ),
+        migrations.RemoveField(
+            model_name='cable',
+            name='is_cable',
+        ),
+        migrations.RemoveField(
+            model_name='cable',
+            name='next_sched_maint',
+        ),
+        migrations.RemoveField(
+            model_name='cable',
+            name='parent',
+        ),
+        migrations.RemoveField(
+            model_name='cable',
+            name='purchase_price',
+        ),
+        migrations.RemoveField(
+            model_name='cable',
+            name='purchased_from',
+        ),
+        migrations.RemoveField(
+            model_name='cable',
+            name='salvage_value',
+        ),
+        migrations.RemoveField(
+            model_name='cable',
+            name='serial_number',
+        ),
+        migrations.RemoveField(
+            model_name='cable',
+            name='status',
+        ),
+        migrations.AddField(
+            model_name='asset',
+            name='polymorphic_ctype',
+            field=models.ForeignKey(editable=False, null=True, on_delete=django.db.models.deletion.CASCADE, related_name='polymorphic_assets.asset_set+', to='contenttypes.ContentType'),
+        ),
+        migrations.AddField(
+            model_name='cable',
+            name='asset_ptr',
+            field=models.OneToOneField(auto_created=True, default=0, on_delete=django.db.models.deletion.CASCADE, parent_link=True, primary_key=True, serialize=False, to='assets.Asset'),
+            preserve_default=False,
+        ),
+    ]