improved search filter

cookbook/filters.py

@@ -1,10 +1,20 @@
 import django_filters
 
-from cookbook.models import Recipe
+from cookbook.forms import MultiSelectWidget
+from cookbook.models import Recipe, Keyword
 
 
 class RecipeFilter(django_filters.FilterSet):
     name = django_filters.CharFilter(lookup_expr='contains')
+    keywords = django_filters.ModelMultipleChoiceFilter(queryset=Keyword.objects.all(), widget=MultiSelectWidget, method='filter_keywords')
+
+    @staticmethod
+    def filter_keywords(queryset, name, value):
+        if not name == 'keywords':
+            return queryset
+        for x in value:
+            queryset = queryset.filter(keywords=x)
+        return queryset
 
     class Meta:
         model = Recipe