Add "part" reference to SalesOrderLineItem model

InvenTree/order/migrations/0022_salesorderlineitem_part.py

@@ -0,0 +1,20 @@
+# Generated by Django 3.0.5 on 2020-04-20 22:33
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('part', '0035_auto_20200406_0045'),
+        ('order', '0021_auto_20200420_1010'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='salesorderlineitem',
+            name='part',
+            field=models.ForeignKey(help_text='Part', limit_choices_to={'salable': True}, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='sales_orders', to='part.Part'),
+        ),
+    ]