feat: q to bool

tests/test_q.py

@@ -19,6 +19,17 @@ def test_q_basic():
     assert q.join_type == "AND"
 
 
+def test_q_to_bool():
+    q = Q(row="data")
+    q_empty = Q()
+    q_children = Q(Q(row="data"), Q(row="data"))
+    q_children_empty = Q(Q(), Q())
+    assert bool(q) is True
+    assert bool(q_empty) is False
+    assert bool(q_children) is True
+    assert bool(q_children_empty) is False
+
+
 def test_q_compound():
     q1 = Q(moo="cow")
     q2 = Q(moo="bull")

tortoise/expressions.py

@@ -326,6 +326,9 @@ def __eq__(self, other: object) -> bool:
             and self.filters == other.filters
         )
 
+    def __bool__(self) -> bool:
+        return any((self.filters, *(children for children in self.children)))
+
     def negate(self) -> None:
         """
         Negates the current Q object. (mutation)