fix shopping list sharing

cookbook/models.py

@@ -609,7 +609,7 @@ class NutritionInformation(models.Model, PermissionModelMixin):
     )
     proteins = models.DecimalField(default=0, decimal_places=16, max_digits=32)
     calories = models.DecimalField(default=0, decimal_places=16, max_digits=32)
-    source = models.CharField( max_length=512, default="", null=True, blank=True)
+    source = models.CharField(max_length=512, default="", null=True, blank=True)
 
     space = models.ForeignKey(Space, on_delete=models.CASCADE)
     objects = ScopedManager(space='space')
@@ -852,11 +852,12 @@ class ShoppingListEntry(ExportModelOperationsMixin('shopping_list_entry'), model
     def __str__(self):
         return f'Shopping list entry {self.id}'
 
-    # TODO deprecate
     def get_shared(self):
-        return self.shoppinglist_set.first().shared.all()
+        try:
+            return self.shoppinglist_set.first().shared.all()
+        except AttributeError:
+            return self.created_by.userpreference.shopping_share.all()
 
-    # TODO deprecate
     def get_owner(self):
         try:
             return self.created_by or self.shoppinglist_set.first().created_by
@@ -881,6 +882,12 @@ class ShoppingList(ExportModelOperationsMixin('shopping_list'), models.Model, Pe
     def __str__(self):
         return f'Shopping list {self.id}'
 
+    def get_shared(self):
+        try:
+            return self.shared.all() or self.created_by.userpreference.shopping_share.all()
+        except AttributeError:
+            return []
+
 
 class ShareLink(ExportModelOperationsMixin('share_link'), models.Model, PermissionModelMixin):
     recipe = models.ForeignKey(Recipe, on_delete=models.CASCADE)