#1281 Fix magic operation .as_ for values interpreted as False (#1283)

Modified the ".as_" method in the magic filter class to correctly handle values that are interpreted as `False` such as `0`. Previously, the method incorrectly dismissed these valid values. The issue was identified and fixed to ensure correct handling of all valid data inputs.

tests/test_utils/test_magic_filter.py

@@ -19,3 +19,17 @@ class TestMagicFilter:
         result = magic.resolve(MyObject(text="123"))
         assert isinstance(result, dict)
         assert isinstance(result["match"], Match)
+
+    def test_operation_as_not_none(self):
+        # Issue: https://github.com/aiogram/aiogram/issues/1281
+        magic = F.cast(int).as_("value")
+
+        result = magic.resolve("0")
+        assert result == {"value": 0}
+
+    def test_operation_as_not_none_iterable(self):
+        # Issue: https://github.com/aiogram/aiogram/issues/1281
+        magic = F.as_("value")
+
+        result = magic.resolve([])
+        assert result is None