From 9730935002eb91abb3e5ab28730600d0d1072282 Mon Sep 17 00:00:00 2001
From: Vladimir Blagojevic <dovlex@gmail.com>
Date: Tue, 9 Jul 2024 10:09:35 +0200
Subject: [PATCH 1/2] Add legacy filter deprecation warning

---
 haystack/utils/filters.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/haystack/utils/filters.py b/haystack/utils/filters.py
index fe2f7530b2..41eca57277 100644
--- a/haystack/utils/filters.py
+++ b/haystack/utils/filters.py
@@ -2,6 +2,7 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 
+import warnings
 from dataclasses import fields
 from datetime import datetime
 from typing import Any, Dict, List, Union
@@ -214,6 +215,12 @@ def convert(filters: Dict[str, Any]) -> Dict[str, Any]:
     }
     ```
     """
+    warnings.warn(
+        "You are using deprecated filter syntax. Please use the new filter syntax as described "
+        "in the documentation. We will attempt to convert your old filter syntax to the new one. The old syntax "
+        "support will be removed in Haystack 2.5",
+        DeprecationWarning,
+    )
     if not isinstance(filters, dict):
         msg = f"Can't convert filters from type '{type(filters)}'"
         raise ValueError(msg)

From 5d5b1d5b926df34793c8520001b58d2775f58be9 Mon Sep 17 00:00:00 2001
From: Vladimir Blagojevic <dovlex@gmail.com>
Date: Tue, 9 Jul 2024 10:15:01 +0200
Subject: [PATCH 2/2] Add release note

---
 ...ecation-warning-legacy-filter-syntax-2fe61cab5e14ad8e.yaml | 4 ++++
 1 file changed, 4 insertions(+)
 create mode 100644 releasenotes/notes/deprecation-warning-legacy-filter-syntax-2fe61cab5e14ad8e.yaml

diff --git a/releasenotes/notes/deprecation-warning-legacy-filter-syntax-2fe61cab5e14ad8e.yaml b/releasenotes/notes/deprecation-warning-legacy-filter-syntax-2fe61cab5e14ad8e.yaml
new file mode 100644
index 0000000000..65e271e107
--- /dev/null
+++ b/releasenotes/notes/deprecation-warning-legacy-filter-syntax-2fe61cab5e14ad8e.yaml
@@ -0,0 +1,4 @@
+---
+deprecations:
+ - |
+   Added deprecation warning for using old filter syntax. Users are advised to switch to the new filter syntax as the old syntax will be removed 2.5 Haystack release.