change offer list and add party model and serializer

core/apps/orders/admin/party.py

@@ -1,9 +1,23 @@
 from django.contrib import admin
 
-from core.apps.orders.models import Party
+from core.apps.orders.models import Party, PartyAmount
+
+
+class PartyAmountInline(admin.StackedInline):
+    model = PartyAmount
+    extra = 1
+    show_change_link = True
 
 
 @admin.register(Party)
 class PartyAdmin(admin.ModelAdmin):
     list_display = ['mediator', 'delivery_date', 'payment_date']
-    
+    inlines = [PartyAmountInline]    
+
+
+@admin.register(PartyAmount)
+class PartyAmountAdmin(admin.ModelAdmin):
+    list_display = ['id', 'total_price', 'cost_amount']
+
+    def has_module_permission(self, request):
+        return False