Merge pull request #1757 from matmair/stock-next-prev

Stock previous / next serial

InvenTree/stock/templates/stock/item_base.html

@@ -247,7 +247,19 @@
     <tr>
         <td><span class='fas fa-hashtag'></span></td>
         <td>{% trans "Serial Number" %}</td>
-        <td>{{ item.serial }}</td>
+        <td>
+        {% if previous %}
+            <a class="btn btn-default" aria-label="{% trans 'previous page' %}" href="{% url request.resolver_match.url_name previous.id %}">
+                <small>{{ previous.serial }}</small>  ‹
+            </a>
+        {% endif %}
+        <span class="btn" href=""><strong>{{ item.serial }}</strong></span>
+        {% if next %}
+            <a class="btn btn-default text-sm" aria-label="{% trans 'next page' %}" href="{% url request.resolver_match.url_name next.id %}">
+                ›  <small>{{ next.serial }}</small>
+            </a>
+        {% endif %}
+        </td>
     </tr>
     {% else %}
     <tr>

InvenTree/stock/views.py

@@ -86,6 +86,29 @@ class StockItemDetail(InvenTreeRoleMixin, DetailView):
     queryset = StockItem.objects.all()
     model = StockItem
 
+    def get_context_data(self, **kwargs):
+        """ add previous and next item """
+        data = super().get_context_data(**kwargs)
+
+        if self.object.serialized:
+            serial_elem = {a.serial: a for a in self.object.part.stock_items.all() if a.serialized}
+            serials = [int(a) for a in serial_elem.keys()]
+            current = int(self.object.serial)
+
+            # previous
+            for nbr in range(current - 1, -1, -1):
+                if nbr in serials:
+                    data['previous'] = serial_elem.get(str(nbr), None)
+                    break
+
+            # next
+            for nbr in range(current + 1, max(serials) + 1):
+                if nbr in serials:
+                    data['next'] = serial_elem.get(str(nbr), None)
+                    break
+
+        return data
+
 
 class StockItemNotes(InvenTreeRoleMixin, UpdateView):
     """ View for editing the 'notes' field of a StockItem object """