starting work on new sync algorithm

cookbook/migrations/0206_shoppinglistentry_updated_at.py

@@ -0,0 +1,18 @@
+# Generated by Django 4.2.7 on 2023-12-30 08:00
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('cookbook', '0205_alter_food_fdc_id_alter_propertytype_fdc_id'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='shoppinglistentry',
+            name='updated_at',
+            field=models.DateTimeField(auto_now=True),
+        ),
+    ]

cookbook/models.py

@@ -1050,6 +1050,8 @@ class ShoppingListEntry(ExportModelOperationsMixin('shopping_list_entry'), model
     checked = models.BooleanField(default=False)
     created_by = models.ForeignKey(User, on_delete=models.CASCADE)
     created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+
     completed_at = models.DateTimeField(null=True, blank=True)
     delay_until = models.DateTimeField(null=True, blank=True)
 

cookbook/serializer.py

@@ -1074,7 +1074,7 @@ class ShoppingListEntrySerializer(WritableNestedModelSerializer):
 
         # autosync values are only needed for frequent 'checked' value updating
         if self.context['request'] and bool(int(self.context['request'].query_params.get('autosync', False))):
-            for f in list(set(fields) - set(['id', 'checked'])):
+            for f in list(set(fields) - set(['id', 'checked', 'updated_at', ])):
                 del fields[f]
         return fields
 
@@ -1118,7 +1118,7 @@ class ShoppingListEntrySerializer(WritableNestedModelSerializer):
         fields = (
             'id', 'list_recipe', 'food', 'unit', 'ingredient', 'ingredient_note', 'amount', 'order', 'checked',
             'recipe_mealplan',
-            'created_by', 'created_at', 'completed_at', 'delay_until'
+            'created_by', 'created_at', 'updated_at', 'completed_at', 'delay_until'
         )
         read_only_fields = ('id', 'created_by', 'created_at',)
 

cookbook/views/api.py

@@ -1163,6 +1163,11 @@ class ShoppingListEntryViewSet(viewsets.ModelViewSet):
         if 'checked' in self.request.query_params or 'recent' in self.request.query_params:
             return shopping_helper(self.queryset, self.request)
 
+        last_autosync = self.request.query_params.get('last_autosync', None)
+        if last_autosync:
+            last_autosync = datetime.datetime.now() # TODO implement
+            self.queryset = self.queryset.filter(updated_at__gte=last_autosync)
+
         # TODO once old shopping list is removed this needs updated to sharing users in preferences
         return self.queryset
 
@@ -1174,11 +1179,13 @@ class ShoppingListViewSet(viewsets.ModelViewSet):
     permission_classes = [(CustomIsOwner | CustomIsShared) & CustomTokenHasReadWriteScope]
 
     def get_queryset(self):
-        return self.queryset.filter(
+        self.queryset = self.queryset.filter(
             Q(created_by=self.request.user)
             | Q(shared=self.request.user)
             | Q(created_by__in=list(self.request.user.get_shopping_share()))
-        ).filter(space=self.request.space).distinct()
+        ).filter(space=self.request.space)
+
+        return self.queryset.distinct()
 
     def get_serializer_class(self):
         try: