storage: add Not criteria (#6108)

tests/test_storage.py

@@ -242,9 +242,11 @@ def test_select():
     assert len(Foobar.select([st.Less('unique_value', 26)])) == 25
     assert len(Foobar.select([st.Less('unique_value', 25), st.GreaterOrEqual('unique_value', 10)])) == 15
     assert len(Foobar.select([st.NotEqual('unique_value', 25)])) == 49
+    assert len(Foobar.select([st.Not(st.Equal('unique_value', 25))])) == 49
     assert len(Foobar.select([st.Contains('unique_value', [24, 25, 26])])) == 3
     assert len(Foobar.select([st.Contains('unique_value', [24, 25, 86])])) == 2
     assert len(Foobar.select([st.NotContains('unique_value', [24, 25, 86])])) == 48
+    assert len(Foobar.select([st.Not(st.Contains('unique_value', [24, 25, 86]))])) == 48
 
 
 def test_select_order_by():
@@ -366,6 +368,7 @@ def test_select_criteria_null():
 
     assert len(Foobar.select([st.Null('value')])) == 33
     assert len(Foobar.select([st.NotNull('value')])) == 17
+    assert len(Foobar.select([st.Not(st.Null('value'))])) == 17
 
 
 def test_select_criteria_ilike():

wcs/qommon/storage.py

@@ -216,6 +216,23 @@ class Intersects(Criteria):
         return func
 
 
+class Not(Criteria):
+    def __init__(self, criteria, **kwargs):
+        self.criteria = criteria
+
+    def build_lambda(self):
+        func = lambda x: False
+
+        def combine_callables(x1, x2):
+            return lambda x: not x2(x)
+
+        func = combine_callables(func, self.criteria.build_lambda())
+        return func
+
+    def __repr__(self):
+        return '<%s (%r)>' % (self.__class__.__name__, self.criteria)
+
+
 class Or(Criteria):
     def __init__(self, criterias, **kwargs):
         self.criterias = criterias