From dd5dcc859752ec0f4b07af450e36cdcfaad78b6f Mon Sep 17 00:00:00 2001
From: MartinGotelli <martin.ferenaz@housecallpro.com>
Date: Fri, 17 May 2024 16:43:48 -0300
Subject: [PATCH] Fix in exists operator. Was working as null

---
 langchain_postgres/vectorstores.py                | 2 +-
 tests/unit_tests/fixtures/filtering_test_cases.py | 8 ++++----
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/langchain_postgres/vectorstores.py b/langchain_postgres/vectorstores.py
index 2061a920..89b78fba 100644
--- a/langchain_postgres/vectorstores.py
+++ b/langchain_postgres/vectorstores.py
@@ -720,7 +720,7 @@ def _handle_field_filter(
                 self.EmbeddingStore.cmetadata,
                 field,
             )
-            return ~condition if filter_value else condition
+            return condition if filter_value else ~condition
         else:
             raise NotImplementedError()
 
diff --git a/tests/unit_tests/fixtures/filtering_test_cases.py b/tests/unit_tests/fixtures/filtering_test_cases.py
index 0fb7e3f4..514a10f1 100644
--- a/tests/unit_tests/fixtures/filtering_test_cases.py
+++ b/tests/unit_tests/fixtures/filtering_test_cases.py
@@ -226,19 +226,19 @@
 TYPE_6_FILTERING_TEST_CASES = [
     # These involve the special operator $exists
     (
-        {"happiness": {"$exists": True}},
+        {"happiness": {"$exists": False}},
         [],
     ),
     (
-        {"happiness": {"$exists": False}},
+        {"happiness": {"$exists": True}},
         [1, 2, 3],
     ),
     (
-        {"sadness": {"$exists": True}},
+        {"sadness": {"$exists": False}},
         [3],
     ),
     (
-        {"sadness": {"$exists": False}},
+        {"sadness": {"$exists": True}},
         [1, 2],
     ),
 ]