Fix for StockItem model

- Allow sales_order_line to be blank

InvenTree/InvenTree/static/script/inventree/stock.js

@@ -230,10 +230,6 @@ function loadStockTable(table, options) {
                     }
 
                     html = imageHoverIcon(thumb) + renderLink(name, url);
-
-                    if (row.allocated) {
-                        html += `<span class='fas fa-bookmark label-right' title='StockItem has been allocated'></span>`;
-                    }
                     
                     return html;
                 }
@@ -261,9 +257,18 @@ function loadStockTable(table, options) {
                         val = +val.toFixed(5);
                     }
 
-                    var text = renderLink(val, '/stock/item/' + row.pk + '/');
+                    var html = renderLink(val, `/stock/item/${row.pk}/`);
                     
-                    return text;
+                    if (row.allocated) {
+                        html += `<span class='fas fa-bookmark label-right' title='StockItem has been allocated'></span>`;
+                    }
+
+                    // 70 = "LOST"
+                    if (row.status == 70) {
+                        html += `<span class='fas fa-question-circle label-right' title='StockItem is lost'></span>`;
+                    }
+
+                    return html;
                 }
             },
             {

InvenTree/stock/migrations/0030_auto_20200422_0015.py

@@ -0,0 +1,20 @@
+# Generated by Django 3.0.5 on 2020-04-22 00:15
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('order', '0023_auto_20200420_2309'),
+        ('stock', '0029_auto_20200421_2359'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='stockitem',
+            name='sales_order_line',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='stock_items', to='order.SalesOrderLineItem'),
+        ),
+    ]

InvenTree/stock/models.py

@@ -373,7 +373,7 @@ class StockItem(MPTTModel):
         SalesOrderLineItem,
         on_delete=models.SET_NULL,
         related_name='stock_items',
-        null=True)
+        null=True, blank=True)
 
     # last time the stock was checked / counted
     stocktake_date = models.DateField(blank=True, null=True)