add decr_version operation as both sync and async

Author: amirreza8002

django_valkey/base.py

@@ -210,6 +210,9 @@ def set(self: BaseValkeyCache, *args, **kwargs) -> bool:
     def incr_version(self: BaseValkeyCache, *args, **kwargs) -> int:
         return self.client.incr_version(*args, **kwargs)
 
+    def decr_version(self: BaseValkeyCache, *args, **kwargs) -> int:
+        return self.client.decr_version(*args, **kwargs)
+
     def add(self: BaseValkeyCache, *args, **kwargs) -> bool:
         return self.client.add(*args, **kwargs)
 
@@ -398,6 +401,9 @@ async def set(self: BaseValkeyCache, *args, **kwargs):
     async def incr_version(self, *args, **kwargs):
         return await self.client.aincr_version(*args, **kwargs)
 
+    async def decr_version(self, *args, **kwargs):
+        return await self.client.adecr_version(*args, **kwargs)
+
     async def add(self, *args, **kwargs):
         return await self.client.aadd(*args, **kwargs)
 

django_valkey/base_client.py

@@ -331,6 +331,15 @@ def incr_version(
         self.delete(old_key, client=client)
         return version + delta
 
+    def decr_version(
+        self: BaseClient,
+        key: KeyT,
+        delta: int = 1,
+        version: int | None = None,
+        client: Backend | Any | None = None,
+    ) -> int:
+        return self.incr_version(key=key, delta=-delta, version=version, client=client)
+
     def _incr_version(
         self: BaseClient,
         key: KeyT,
@@ -1464,6 +1473,17 @@ async def incr_version(
         await self.delete(old_key, client=client)
         return version + delta
 
+    async def decr_version(
+        self: BaseClient,
+        key: KeyT,
+        delta: int = 1,
+        version: int | None = None,
+        client: Backend | Any | None = None,
+    ) -> int:
+        return await self.incr_version(
+            key=key, delta=-delta, version=version, client=client
+        )
+
     async def _incr_version(self, key, delta, version, client) -> tuple:
         if version is None:
             version = self._backend.version