improved converters and helpers

cookbook/signals.py

@@ -4,15 +4,17 @@ from functools import wraps
 from django.conf import settings
 from django.contrib.auth.models import User
 from django.contrib.postgres.search import SearchVector
+from django.core.cache import caches
 from django.db.models.signals import post_save
 from django.dispatch import receiver
 from django.utils import translation
 from django_scopes import scope, scopes_disabled
 
+from cookbook.helper.cache_helper import CacheHelper
 from cookbook.helper.shopping_helper import RecipeShoppingEditor
 from cookbook.managers import DICTIONARY
 from cookbook.models import (Food, FoodInheritField, Ingredient, MealPlan, Recipe,
-                             ShoppingListEntry, Step, UserPreference, SearchPreference, SearchFields)
+                             ShoppingListEntry, Step, UserPreference, SearchPreference, SearchFields, Unit)
 
 SQLITE = True
 if settings.DATABASES['default']['ENGINE'] in ['django.db.backends.postgresql_psycopg2',
@@ -149,3 +151,9 @@ def auto_add_shopping(sender, instance=None, created=False, weak=False, **kwargs
             print("MEAL_AUTO_ADD Created SLR")
     except AttributeError:
         pass
+
+
+@receiver(post_save, sender=Unit)
+def create_search_preference(sender, instance=None, created=False, **kwargs):
+    if instance:
+        caches['default'].delete(CacheHelper(instance.space).BASE_UNITS_CACHE_KEY)