1 files changed, 24 insertions, 0 deletions

diff --git a/bitbake/lib/toaster/toastergui/querysetfilter.py b/bitbake/lib/toaster/toastergui/querysetfilter.py
new file mode 100644
index 0000000000..62297e9b89
--- /dev/null
+++ b/bitbake/lib/toaster/toastergui/querysetfilter.py
@@ -0,0 +1,24 @@
+class QuerysetFilter(object):
+    """ Filter for a queryset """
+
+    def __init__(self, criteria=None):
+        if criteria:
+            self.set_criteria(criteria)
+
+    def set_criteria(self, criteria):
+        """
+        criteria is an instance of django.db.models.Q;
+        see https://docs.djangoproject.com/en/1.9/ref/models/querysets/#q-objects
+        """
+        self.criteria = criteria
+
+    def filter(self, queryset):
+        """
+        Filter queryset according to the criteria for this filter,
+        returning the filtered queryset
+        """
+        return queryset.filter(self.criteria)
+
+    def count(self, queryset):
+        """ Returns a count of the elements in the filtered queryset """
+        return self.filter(queryset).count()