⚡️ v3.1.2 Improve index filtering. (#223)

- **Improve filtering logic for non-datetime pipes.**  
  The `Pipe.fiter_existing()` method has been fixed to correctly apply non-datetime filters when syncing dataframes.

- **Handle mixed nulls when filtering dataframes.**  
  Dataframes with different nulls (e.g. empty strings vs `None` vs `pd.NA`, etc.) are now correctly coerced to reduce excessive updates.

- **Fix minor cache race condition.**  
  When syncing pipes with many concurrent chunks, additional safeguards have been added to ensure cached values are ready correctly.

- **Bump Docker base to Python 3.14.**  
  The Docker image has been rebased to `fedora:43` which ships with Python 3.14.

Author: bmeares

CHANGELOG.md

@@ -1,9 +1,23 @@
 # 🪵 Changelog
 
-## 3.0.x Releases
+## 3.1.x Releases
 
 This is the current release cycle, so stay tuned for future releases!
 
+### v3.1.2
+
+- **Improve filtering logic for non-datetime pipes.**  
+  The `Pipe.fiter_existing()` method has been fixed to correctly apply non-datetime filters when syncing dataframes.
+
+- **Handle mixed nulls when filtering dataframes.**  
+  Dataframes with different nulls (e.g. empty strings vs `None` vs `pd.NA`, etc.) are now correctly coerced to reduce excessive updates.
+
+- **Fix minor cache race condition.**  
+  When syncing pipes with many concurrent chunks, additional safeguards have been added to ensure cached values are ready correctly.
+
+- **Bump Docker base to Python 3.14.**  
+  The Docker image has been rebased to `fedora:43` which ships with Python 3.14.
+
 ### v3.1.0 – v3.1.1
 
 - **Improve `geometry` performance.**  
@@ -23,6 +37,8 @@ This is the current release cycle, so stay tuned for future releases!
 
 - **Drop `citus` from the test suite.**  
   Like `cockroachdb`, the `citus` flavor has been deprecated; please use the `postgresql` flavor instead. 
+  
+## 3.0.x Releases
 
 ### v3.0.9 – v3.0.10
 

Dockerfile

@@ -1,4 +1,4 @@
-FROM fedora:42 AS runtime
+FROM fedora:43 AS runtime
 
 ARG dep_group=full \
     mrsm_user=meerschaum \

docs/mkdocs/news/changelog.md

@@ -1,9 +1,23 @@
 # 🪵 Changelog
 
-## 3.0.x Releases
+## 3.1.x Releases
 
 This is the current release cycle, so stay tuned for future releases!
 
+### v3.1.2
+
+- **Improve filtering logic for non-datetime pipes.**  
+  The `Pipe.fiter_existing()` method has been fixed to correctly apply non-datetime filters when syncing dataframes.
+
+- **Handle mixed nulls when filtering dataframes.**  
+  Dataframes with different nulls (e.g. empty strings vs `None` vs `pd.NA`, etc.) are now correctly coerced to reduce excessive updates.
+
+- **Fix minor cache race condition.**  
+  When syncing pipes with many concurrent chunks, additional safeguards have been added to ensure cached values are ready correctly.
+
+- **Bump Docker base to Python 3.14.**  
+  The Docker image has been rebased to `fedora:43` which ships with Python 3.14.
+
 ### v3.1.0 – v3.1.1
 
 - **Improve `geometry` performance.**  
@@ -23,6 +37,8 @@ This is the current release cycle, so stay tuned for future releases!
 
 - **Drop `citus` from the test suite.**  
   Like `cockroachdb`, the `citus` flavor has been deprecated; please use the `postgresql` flavor instead. 
+  
+## 3.0.x Releases
 
 ### v3.0.9 – v3.0.10
 

meerschaum/config/_version.py

@@ -2,4 +2,4 @@
 Specify the Meerschaum release version.
 """
 
-__version__ = "3.1.1"
+__version__ = "3.1.2"

meerschaum/core/Pipe/__init__.py

@@ -53,6 +53,8 @@
 
 import sys
 import copy
+import threading
+import collections
 
 import meerschaum as mrsm
 from meerschaum.utils.typing import Optional, Dict, Any, Union, List, InstanceConnector
@@ -439,6 +441,8 @@ def __init__(
         if self.instance_keys == 'sql:memory':
             self.cache = False
 
+        self._cache_locks = collections.defaultdict(lambda: threading.RLock())
+
 
     @property
     def meta(self):