Serial number placeholder text for BuildComplete form

InvenTree/InvenTree/forms.py

@@ -34,6 +34,10 @@ class HelperForm(forms.ModelForm):
         Simply create a 'blank' layout for each available field.
         """
 
+        self.rebuild_layout()
+
+    def rebuild_layout(self):
+
         layouts = []
 
         for field in self.fields:

InvenTree/build/forms.py

@@ -46,6 +46,13 @@ class ConfirmBuildForm(HelperForm):
 class CompleteBuildForm(HelperForm):
     """ Form for marking a Build as complete """
 
+    field_prefix = {
+        'serial_numbers': 'fa-hashtag',
+    }
+
+    field_placeholder = {
+    }
+
     location = forms.ModelChoiceField(
         queryset=StockLocation.objects.all(),
         help_text='Location of completed parts',

InvenTree/build/models.py

@@ -53,6 +53,19 @@ class Build(MPTTModel):
     def get_absolute_url(self):
         return reverse('build-detail', kwargs={'pk': self.id})
 
+    def clean(self):
+        """
+        Validation for Build object.
+        """
+
+        super().clean()
+
+        if self.part.trackable:
+            if not self.quantity == int(self.quantity):
+                raise ValidationError({
+                    'quantity': _("Build quantity must be integer value for trackable parts")
+                })
+
     title = models.CharField(
         verbose_name=_('Build Title'),
         blank=False,

InvenTree/build/views.py

@@ -196,6 +196,20 @@ class BuildComplete(AjaxUpdateView):
 
         if not build.part.trackable:
             form.fields.pop('serial_numbers')
+        else:
+            sn = build.part.getNextSerialNumber()
+
+            if build.quantity > 1:
+                sn = "{n}-{m}".format(
+                    n=str(sn),
+                    m=str(sn+build.quantity-1)
+                )
+            else:
+                sn = str(sn)
+            
+            form.field_placeholder['serial_numbers'] = sn
+
+            form.rebuild_layout()
 
         return form
 
@@ -208,6 +222,7 @@ class BuildComplete(AjaxUpdateView):
         initials = super(BuildComplete, self).get_initial().copy()
 
         build = self.get_object()
+
         if build.part.default_location is not None:
             try:
                 location = StockLocation.objects.get(pk=build.part.default_location.id)

InvenTree/stock/views.py

@@ -876,6 +876,8 @@ class StockItemCreate(AjaxCreateView):
                 sn = part.getNextSerialNumber()
                 form.field_placeholder['serial_numbers'] = _('Next available serial number is') + ' ' + str(sn)
 
+                form.rebuild_layout()
+
                 # Hide the 'part' field (as a valid part is selected)
                 form.fields['part'].widget = HiddenInput()
 
@@ -998,6 +1000,8 @@ class StockItemCreate(AjaxCreateView):
                 sn = part.getNextSerialNumber()
                 form.field_placeholder['serial_numbers'] = _("Next available serial number is") + " " + str(sn)
 
+                form.rebuild_layout()
+
             except (Part.DoesNotExist, ValueError, InvalidOperation):
                 part = None
                 quantity = 1