1 files changed, 10 insertions, 0 deletions
diff --git a/archivist/peewee_ext.py b/archivist/peewee_ext.py
index 9fda66e..80bb6f4 100644
--- a/archivist/peewee_ext.py
+++ b/archivist/peewee_ext.py
@@ -1,6 +1,16 @@
 from playhouse.sqlite_ext import VirtualModel, VirtualIntegerField, VirtualCharField
 from peewee import Field
 
+from itertools import starmap
+from functools import reduce
+import operator as op
+
+def sqlite_tuple_in(fields, values):
+    """SQLite does not support (foo, bar) IN ((1,2),(3,4)).
+    So we construct a '(foo = 1 AND bar = 2) OR (foo = 3 AND bar = 4)' monstrum."""
+    subqueries = (reduce(op.and_, starmap(op.eq, zip(fields, value_tuple))) for value_tuple in values)
+    return reduce(op.or_, subqueries)
+
 class EnumField(Field):
     db_field = 'enum'