initial showcase implementation

InvenTree/order/models.py

@@ -326,7 +326,7 @@ class PurchaseOrder(Order):
         return self.pending_line_items().count() == 0
 
     @transaction.atomic
-    def receive_line_item(self, line, location, quantity, user, status=StockStatus.OK):
+    def receive_line_item(self, line, location, quantity, user, status=StockStatus.OK, purchase_price=None):
         """ Receive a line item (or partial line item) against this PO
         """
 
@@ -348,7 +348,8 @@ class PurchaseOrder(Order):
                 location=location,
                 quantity=quantity,
                 purchase_order=self,
-                status=status
+                status=status,
+                purchase_price=purchase_price,
             )
 
             stock.save()

InvenTree/order/views.py

@@ -776,6 +776,7 @@ class PurchaseOrderReceive(AjaxUpdateView):
                 line.receive_quantity,
                 self.request.user,
                 status=line.status_code,
+                purchase_price=line.purchase_price,
             )
 
 

InvenTree/part/templates/part/part_pricing.html

@@ -1,5 +1,6 @@
 {% extends "modal_form.html" %}
 
+{% load i18n %}
 {% block pre_form_content %}
 
 <div class='alert alert-info alert-block'>
@@ -77,6 +78,76 @@ Pricing information for:<br>
 </table>
     {% endif %}
 
+    {% if price_history %}
+    <h4>{% trans 'Stock Pricing' %}</h4>
+    {% if price_history|length > 1 %}
+        <canvas id="priceChart"></canvas>
+        <script>
+        var pricedata = {
+                labels: [
+                    {% for line in price_history %}'{{ line.date }}',{% endfor %}
+                ],
+                datasets: [{
+                    label: 'Price',
+                    backgroundColor: 'rgba(255, 99, 132, 0.2)',
+                    borderColor: 'rgb(255, 99, 132)',
+                    yAxisID: 'y',
+                    data: [
+                        {% for line in price_history %}{{ line.price|stringformat:".2f" }},{% endfor %}
+                    ],
+                    borderWidth: 1,
+                    type: 'line'
+                },
+                {
+                    label: 'Qty',
+                    backgroundColor: 'rgba(255, 206, 86, 0.2)',
+                    borderColor: 'rgb(255, 206, 86)',
+                    yAxisID: 'y1',
+                    data: [
+                        {% for line in price_history %}{{ line.qty|stringformat:"f" }},{% endfor %}
+                    ],
+                    borderWidth: 1
+                }]
+            }
+
+        var ctx = document.getElementById('priceChart');
+        var priceChart = new Chart(ctx, {
+            type: 'bar',
+            data: pricedata,
+            options: {
+                responsive: true,
+                plugins: {legend: {position: 'bottom'}},
+                scales: {
+                    y: {
+                        type: 'linear',
+                        position: 'left',
+                        grid: {display: false},
+                        title: {
+                            display: true,
+                            text: 'Price - USD'
+                        }
+                    },
+                    y1: {
+                        type: 'linear',
+                        position: 'right',
+                        grid: {display: false},
+                        titel: {
+                            display: true,
+                            text: 'Qty',
+                            position: 'right'
+                        }
+                    }
+                }
+            }
+        });
+        </script>
+    {% else %}
+    <div class='alert alert-danger alert-block'>
+        {% trans 'No stock pricing history is available for this part.' %}
+    </div>
+    {% endif %}
+    {% endif %}
+
 {% if min_unit_buy_price or min_unit_bom_price %}
 {% else %}
 <div class='alert alert-danger alert-block'>

InvenTree/part/views.py

@@ -2027,6 +2027,30 @@ class PartPricing(AjaxView):
                     ctx['max_total_bom_price'] = max_bom_price
                     ctx['max_unit_bom_price'] = max_bom_price / quantity
 
+        # Stock history
+        if part.total_stock > 1:
+            ret = []
+            stock = part.stock_entries(include_variants=False, in_stock=True)
+
+            for stock_item in stock:
+                if None in [stock_item.purchase_price, stock_item.quantity]:
+                    continue
+                line = {
+                    'price': stock_item.purchase_price.amount,
+                    'qty': stock_item.quantity
+                }
+                if stock_item.supplier_part:
+                    line['name'] = stock_item.supplier_part.pretty_name
+
+                    if stock_item.supplier_part.unit_pricing and stock_item.purchase_price:
+                        line['price_diff'] = stock_item.supplier_part.unit_pricing - stock_item.purchase_price.amount
+                if stock_item.purchase_order:
+
+                    line['date'] = stock_item.purchase_order.issue_date.strftime('%d.%m.%Y')
+                ret.append(line)
+
+            ctx['price_history'] = ret
+
         return ctx
 
     def get(self, request, *args, **kwargs):

InvenTree/templates/base.html

@@ -136,6 +136,7 @@ InvenTree
 <script type="text/javascript" src="{% static 'fullcalendar/main.js' %}"></script>
 <script type="text/javascript" src="{% static 'script/select2/select2.js' %}"></script>
 <script type='text/javascript' src="{% static 'script/moment.js' %}"></script>
+<script type='text/javascript' src="{% static 'script/chart.min.js' %}"></script>
 
 <script type='text/javascript' src="{% static 'script/inventree/inventree.js' %}"></script>
 <script type='text/javascript' src="{% static 'script/inventree/api.js' %}"></script>