Fix null numeric filter conditions

redisvl/query/filter.py

@@ -375,9 +375,8 @@ def __le__(self, other: int) -> "FilterExpression":
 
     def __str__(self) -> str:
         """Return the Redis Query string for the Numeric filter"""
-        if not self._value:
+        if self._value is None:
             return "*"
-
         if self._operator == FilterOperator.EQ or self._operator == FilterOperator.NE:
             return self.OPERATOR_MAP[self._operator] % (
                 self._field,

tests/integration/test_query.py

@@ -400,3 +400,17 @@ def test_sort_vector_query(index, sorted_vector_query):
 def test_sort_range_query(index, sorted_range_query):
     t = Text("job") % ""
     search(sorted_range_query, index, t, 7, sort=True)
+
+def test_query_with_chunk_number_zero():
+    doc_base_id = "8675309"
+    file_id = "e9ffbac9ff6f67cc"
+    chunk_num = 0
+
+    filter_conditions = (
+        (Tag("doc_base_id") == doc_base_id) &
+        (Tag("file_id") == file_id) &
+        (Num("chunk_number") == chunk_num)
+    )
+
+    expected_query_str = '((@doc_base_id:{8675309} @file_id:{e9ffbac9ff6f67cc}) @chunk_number:[0 0])'
+    assert str(filter_conditions) == expected_query_str, "Query with chunk_number zero is incorrect"

tests/unit/test_filter.py

@@ -285,3 +285,7 @@ def test_filters_combination():
     tf3 = Text("text_field") == None
     tf4 = Geo("geo_field") == GeoRadius(1.0, 2.0, 3, "km")
     assert str(tf1 & tf2 & tf3 & tf4) == str(tf1 & tf4)
+
+def test_num_filter_zero():
+    num_filter = Num("chunk_number") == 0
+    assert str(num_filter) == "@chunk_number:[0 0]", "Num filter should handle zero correctly"