Added help text for model fields

InvenTree/stock/migrations/0014_auto_20190508_2332.py

@@ -0,0 +1,19 @@
+# Generated by Django 2.2 on 2019-05-08 13:32
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('stock', '0013_remove_stockitem_uuid'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='stockitem',
+            name='supplier_part',
+            field=models.ForeignKey(blank=True, help_text='Select a matching supplier part for this stock item', null=True, on_delete=django.db.models.deletion.SET_NULL, to='part.SupplierPart'),
+        ),
+    ]

InvenTree/stock/models.py

@@ -163,7 +163,8 @@ class StockItem(models.Model):
     part = models.ForeignKey('part.Part', on_delete=models.CASCADE, related_name='locations', help_text='Base part')
 
     # The 'supplier part' used in this instance. May be null if no supplier parts are defined the master part
-    supplier_part = models.ForeignKey('part.SupplierPart', blank=True, null=True, on_delete=models.SET_NULL)
+    supplier_part = models.ForeignKey('part.SupplierPart', blank=True, null=True, on_delete=models.SET_NULL,
+                                      help_text='Select a matching supplier part for this stock item')
 
     # Where the part is stored. If the part has been used to build another stock item, the location may not make sense
     location = models.ForeignKey(StockLocation, on_delete=models.DO_NOTHING,

InvenTree/stock/views.py

@@ -207,6 +207,14 @@ class StockItemCreate(AjaxCreateView):
                 parts = form.fields['supplier_part'].queryset
                 parts = parts.filter(part=part.id)
                 form.fields['supplier_part'].queryset = parts
+
+                # If there is one (and only one) supplier part available, pre-select it
+                all_parts = parts.all()
+                if len(all_parts) == 1:
+
+                    # TODO - This does NOT work for some reason? Ref build.views.BuildItemCreate
+                    form.fields['supplier_part'].initial = all_parts[0].id
+
             except Part.DoesNotExist:
                 pass