[UI] Pricing chart fixes (#9119)

* Fix default values for pricing override

* Fix broken calculation for sale pricing

- Was previously excluding COMPLETED orders

* Fix for PricingOverviewPanel

* Fix for InvenTreeMoneySerializer

- Numbers should be represented as numbers!

* Front-end wrangling too

* Fix unit test

src/backend/InvenTree/InvenTree/serializers.py

@@ -45,6 +45,12 @@ class InvenTreeMoneySerializer(MoneyField):
 
         super().__init__(*args, **kwargs)
 
+    def to_representation(self, obj):
+        """Convert the Money object to a decimal value for representation."""
+        val = super().to_representation(obj)
+
+        return float(val)
+
     def get_value(self, data):
         """Test that the returned amount is a valid Decimal."""
         amount = super(DecimalField, self).get_value(data)
@@ -73,7 +79,11 @@ class InvenTreeMoneySerializer(MoneyField):
         ):
             return Money(amount, currency)
 
-        return amount
+        try:
+            fp_amount = float(amount)
+            return fp_amount
+        except Exception:
+            return amount
 
 
 class InvenTreeCurrencySerializer(serializers.ChoiceField):

src/backend/InvenTree/part/models.py

@@ -62,7 +62,6 @@ from order import models as OrderModels
 from order.status_codes import (
     PurchaseOrderStatus,
     PurchaseOrderStatusGroups,
-    SalesOrderStatus,
     SalesOrderStatusGroups,
 )
 from stock import models as StockModels
@@ -3088,9 +3087,12 @@ class PartPricing(common.models.MetaMixin):
         min_sell_history = None
         max_sell_history = None
 
+        # Calculate sale price history too
+        parts = self.part.get_descendants(include_self=True)
+
         # Find all line items for shipped sales orders which reference this part
         line_items = OrderModels.SalesOrderLineItem.objects.filter(
-            order__status=SalesOrderStatus.SHIPPED, part=self.part
+            order__status__in=SalesOrderStatusGroups.COMPLETE, part__in=parts
         )
 
         # Exclude line items which do not have associated pricing data

src/backend/InvenTree/stock/test_api.py

@@ -1515,13 +1515,13 @@ class StockItemTest(StockAPITestCase):
         data = self.get(url, expected_code=200).data
 
         # Check fixture values
-        self.assertEqual(data['purchase_price'], '123.000000')
+        self.assertAlmostEqual(data['purchase_price'], 123, 3)
         self.assertEqual(data['purchase_price_currency'], 'AUD')
 
         # Update just the amount
         data = self.patch(url, {'purchase_price': 456}, expected_code=200).data
 
-        self.assertEqual(data['purchase_price'], '456.000000')
+        self.assertAlmostEqual(data['purchase_price'], 456, 3)
         self.assertEqual(data['purchase_price_currency'], 'AUD')
 
         # Update the currency