Pre-fill stockitem expiry date in CreateStockItem form

InvenTree/stock/forms.py

@@ -109,6 +109,10 @@ class ConvertStockItemForm(HelperForm):
 class CreateStockItemForm(HelperForm):
     """ Form for creating a new StockItem """
 
+    expiry_date = DatePickerFormField(
+        help_text=('Expiration date for this stock item'),
+    )
+
     serial_numbers = forms.CharField(label=_('Serial numbers'), required=False, help_text=_('Enter unique serial numbers (or leave blank)'))
 
     def __init__(self, *args, **kwargs):
@@ -130,6 +134,7 @@ class CreateStockItemForm(HelperForm):
             'batch',
             'serial_numbers',
             'purchase_price',
+            'expiry_date',
             'link',
             'delete_on_deplete',
             'status',

InvenTree/stock/views.py

@@ -26,7 +26,7 @@ from InvenTree.helpers import str2bool, DownloadFile, GetExportFormats
 from InvenTree.helpers import extract_serial_numbers
 
 from decimal import Decimal, InvalidOperation
-from datetime import datetime
+from datetime import datetime, timedelta
 
 from company.models import Company, SupplierPart
 from part.models import Part
@@ -1596,6 +1596,11 @@ class StockItemCreate(AjaxCreateView):
             initials['location'] = part.get_default_location()
             initials['supplier_part'] = part.default_supplier
 
+            # If the part has a defined expiry period, extrapolate!
+            if part.default_expiry > 0:
+                expiry_date = datetime.now().date() + timedelta(days=part.default_expiry)
+                initials['expiry_date'] = expiry_date
+
         currency_code = common.settings.currency_code_default()
 
         # SupplierPart field has been specified