Fixes for "auto allocate" concept

InvenTree/build/forms.py

@@ -172,6 +172,8 @@ class EditBuildItemForm(HelperForm):
 
     quantity = RoundingDecimalFormField(max_digits=10, decimal_places=5, help_text=_('Select quantity of stock to allocate'))
 
+    part_id = forms.IntegerField(required=False, widget=forms.HiddenInput())
+
     class Meta:
         model = BuildItem
         fields = [

InvenTree/build/models.py

@@ -183,6 +183,14 @@ class Build(MPTTModel):
         blank=True, help_text=_('Extra build notes')
     )
 
+    @property
+    def remaining(self):
+        """
+        Return the number of outputs remaining to be completed.
+        """
+
+        return max(0, self.quantity - self.completed)
+
     @property
     def output_count(self):
         return self.build_outputs.count()
@@ -333,20 +341,25 @@ class Build(MPTTModel):
         self.save()
 
     def getAutoAllocations(self, output):
-        """ Return a list of parts which will be allocated
+        """
+        Return a list of StockItem objects which will be allocated
         using the 'AutoAllocate' function.
 
-        For each item in the BOM for the attached Part:
-
-        - If there is a single StockItem, use that StockItem
-        - Take as many parts as available (up to the quantity required for the BOM)
-        - If there are multiple StockItems available, ignore (leave up to the user)
-
-        Args:
-            output: A stock item (build output) to auto-allocate against
+        For each item in the BOM for the attached Part,
+        the following tests must *all* evaluate to True,
+        for the part to be auto-allocated:
 
+        - The sub_item in the BOM line must *not* be trackable
+        - There is only a single stock item available (which has not already been allocated to this build)
+        - The stock item has an availability greater than zero
+        
         Returns:
-            A list object containing the StockItem objects to be allocated (and the quantities)
+            A list object containing the StockItem objects to be allocated (and the quantities).
+            Each item in the list is a dict as follows:
+            {
+                'stock_item': stock_item,
+                'quantity': stock_quantity,
+            }
         """
 
         allocations = []
@@ -354,24 +367,42 @@ class Build(MPTTModel):
         """
         Iterate through each item in the BOM
         """
-        for item in self.part.bom_items.all().prefetch_related('sub_part'):
 
-            # How many parts required for this build?
-            q_required = item.quantity * self.quantity
+        # Only look at the "untracked" BOM items
+        # Tracked BOM items must be handled separately
+        untracked_bom_items = self.part.bom_items.filter(sub_part__trackable=False)
+
+        for item in untracked_bom_items.prefetch_related('sub_part'):
+
+            # How many parts are still required for this build?
+            #q_required = item.quantity * self.remaining
+            q_required = self.getUnallocatedQuantity(item.sub_part)
 
             # Grab a list of StockItem objects which are "in stock"
-            stock = StockModels.StockItem.objects.filter(StockModels.StockItem.IN_STOCK_FILTER)
+            stock = StockModels.StockItem.objects.filter(
+                StockModels.StockItem.IN_STOCK_FILTER
+            )
             
             # Filter by part reference
             stock = stock.filter(part=item.sub_part)
 
+            # Exclude any stock items which have already been allocated to this build
+            allocated = BuildItem.objects.filter(
+                build=self,
+                stock_item__part=item.sub_part
+            )
+
+            stock = stock.exclude(
+                pk__in=[build_item.stock_item.pk for build_item in allocated]
+            )
+
             # Ensure that the available stock items are in the correct location
             if self.take_from is not None:
                 # Filter for stock that is located downstream of the designated location
                 stock = stock.filter(location__in=[loc for loc in self.take_from.getUniqueChildren()])
 
             # Only one StockItem to choose from? Default to that one!
-            if len(stock) == 1:
+            if stock.count() == 1:
                 stock_item = stock[0]
 
                 # Check that we have not already allocated this stock-item against this build
@@ -567,7 +598,7 @@ class Build(MPTTModel):
         if output:
             return q * output.quantity
         else:
-            return q * self.quantity
+            return q * self.remaining
 
     def getAllocatedQuantity(self, part, output=None):
         """

InvenTree/build/templates/build/auto_allocate.html

@@ -7,8 +7,14 @@
 
 <div class='alert alert-block alert-info'>
 <b>{% trans "Automatically Allocate Stock" %}</b><br>
-{% trans "Stock Items are selected for automatic allocation if there is only a single stock item available." %}<br>
-{% trans "The following stock items will be allocated to the build:" %}<br>
+{% trans "Where the following conditions are met, stock will be automatically allocated to this build" %}:<br>
+<hr>
+{% trans "For each part in the BOM, the following tests are performed" %}:<br>
+<ul>
+    <li>{% trans "The part is not marked as trackable" %}</li>
+    <li>{% trans "Only single stock items exists" %}</li>
+    <li>{% trans "The stock item is not already allocated to this build" %}</li>
+</ul>
 </div>
 
 {% if allocations %}

InvenTree/build/views.py

@@ -18,7 +18,7 @@ from stock.models import StockLocation, StockItem
 
 from InvenTree.views import AjaxUpdateView, AjaxCreateView, AjaxDeleteView
 from InvenTree.views import InvenTreeRoleMixin
-from InvenTree.helpers import str2bool, ExtractSerialNumbers
+from InvenTree.helpers import str2bool, ExtractSerialNumbers, normalize
 from InvenTree.status_codes import BuildStatus
 
 
@@ -116,10 +116,12 @@ class BuildAutoAllocate(AjaxUpdateView):
 
         context = {}
 
+        output = self.get_form()['output_id'].value()
+
         try:
             build = Build.objects.get(id=self.kwargs['pk'])
             context['build'] = build
-            context['allocations'] = build.getAutoAllocations()
+            context['allocations'] = build.getAutoAllocations(output)
         except Build.DoesNotExist:
             context['error'] = _('No matching build found')
 
@@ -687,6 +689,26 @@ class BuildItemCreate(AjaxCreateView):
 
         return ctx
 
+    def validate(self, request, form, data):
+        """
+        Extra validation steps as required
+        """
+
+        stock_item = data.get('stock_item', None)
+        quantity = data.get('quantity', None)
+
+        if stock_item:
+            # Stock item must actually be in stock!
+            if not stock_item.in_stock:
+                form.add_error('stock_item', _('Item must be currently in stock'))
+
+            # Check that there are enough items available
+            if quantity is not None:
+                available = stock_item.unallocated_quantity()
+                if quantity > available:
+                    form.add_error('stock_item', _('Stock item is over-allocated'))
+                    form.add_error('quantity', _('Avaialabe') + ': ' + str(normalize(available)))
+
     def get_form(self):
         """ Create Form for making / editing new Part object """
 
@@ -715,7 +737,7 @@ class BuildItemCreate(AjaxCreateView):
             pass
 
         # If the sub_part is supplied, limit to matching stock items
-        part_id = self.get_param('part')
+        part_id = form['part_id'].value()
 
         if part_id:
             try:
@@ -781,7 +803,7 @@ class BuildItemCreate(AjaxCreateView):
         if part_id:
             try:
                 part = Part.objects.get(pk=part_id)
-                initials['part'] = part
+                initials['part_id'] = part.pk
             except Part.DoesNotExist:
                 pass
 

InvenTree/stock/models.py

@@ -726,6 +726,15 @@ class StockItem(MPTTModel):
 
     @property
     def in_stock(self):
+        """
+        Returns True if this item is in stock
+
+        See also: IN_STOCK_FILTER
+        """
+
+        # Quantity must be above zero (unless infinite)
+        if self.quantity <= 0 and not self.infinite:
+            return False
 
         # Not 'in stock' if it has been installed inside another StockItem
         if self.belongs_to is not None:

InvenTree/templates/js/build.js

@@ -555,12 +555,23 @@ function loadBuildOutputAllocationTable(buildInfo, output, options={}) {
                         qB *= buildInfo.quantity;
                     }
                 
-                    if (aA == 0 && aB == 0) {
+                    // Handle the case where both numerators are zero
+                    if ((aA == 0) && (aB == 0)) {
                         return (qA > qB) ? 1 : -1;
                     }
+
+                    // Handle the case where either denominator is zero
+                    if ((qA == 0) || (qB == 0)) {
+                        return 1;
+                    }
                     
                     var progressA = parseFloat(aA) / qA;
                     var progressB = parseFloat(aB) / qB;
+
+                    // Handle the case where both are at 100%
+                    if (progressA == 1.0 && progressB == 1.0) {
+                        return (qA < qB) ? 1 : -1;
+                    }
     
                     return (progressA < progressB) ? 1 : -1;
                 }