Limit choices for BomItem Part foreignkey fields

- Only allow 'active' Parts

InvenTree/part/migrations/0018_auto_20190505_2231.py

@@ -0,0 +1,24 @@
+# Generated by Django 2.2 on 2019-05-05 12:31
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('part', '0017_auto_20190505_0848'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='bomitem',
+            name='part',
+            field=models.ForeignKey(limit_choices_to={'active': True, 'buildable': True}, on_delete=django.db.models.deletion.CASCADE, related_name='bom_items', to='part.Part'),
+        ),
+        migrations.AlterField(
+            model_name='bomitem',
+            name='sub_part',
+            field=models.ForeignKey(limit_choices_to={'active': True, 'consumable': True}, on_delete=django.db.models.deletion.CASCADE, related_name='used_in', to='part.Part'),
+        ),
+    ]