Fix display error for quote numbers in edit view

core/models/quotes.py

@@ -15,6 +15,10 @@ class Quote(Model):
     expiry = DateField()
     currency = ForeignKey(Currency, on_delete=PROTECT)
 
+    @property
+    def display_number(self):
+        return self.number or self.id
+
 class QuoteItem(Model):
     invoice = ForeignKey(Quote, on_delete=CASCADE)
     sort = PositiveIntegerField()

templates/backend/quotes/update.html

@@ -27,7 +27,7 @@
             <div class="card-header-tab card-header-tab-animation card-header">
                 <div class="card-header-title">
                     <i class="header-icon lnr-apartment icon-gradient bg-love-kiss"> </i>
-                    Editing {{ object.number or object.id }}
+                    Editing {{ object.display_number }}
                 </div>
             </div>
             <div class="card-body">