Changed expiration policy (#28)

* Changed expiration policy

* Updated docs

* Update README.md

Co-authored-by: Pavel Kirilin <win10@list.ru>

---------

Co-authored-by: Pavel Kirilin <win10@list.ru>

Author: chandr-andr

README.md

@@ -71,9 +71,10 @@ Brokers parameters:
 RedisAsyncResultBackend parameters:
 * `redis_url` - url to redis.
 * `keep_results` - flag to not remove results from Redis after reading.
-* `result_ex_time` - expire time in seconds (by default - 1 minute)
+* `result_ex_time` - expire time in seconds (by default - not specified)
 * `result_px_time` - expire time in milliseconds (by default - not specified)
-> IMPORTANT: You must specify either `result_ex_time` or `result_px_time`.  
+> IMPORTANT: **It is highly recommended to use expire time ​​in RedisAsyncResultBackend**  
+> If you want to add expiration, either `result_ex_time` or `result_px_time` must be set.  
 >```python
 ># First variant
 >redis_async_result = RedisAsyncResultBackend(

taskiq_redis/redis_backend.py

@@ -41,7 +41,13 @@ def __init__(
         self.result_ex_time = result_ex_time
         self.result_px_time = result_px_time
 
-        if self.result_ex_time == 0 or self.result_px_time == 0:
+        unavailable_conditions = any(
+            (
+                self.result_ex_time is not None and self.result_ex_time <= 0,
+                self.result_px_time is not None and self.result_px_time <= 0,
+            ),
+        )
+        if unavailable_conditions:
             raise ExpireTimeMustBeMoreThanZeroError(
                 "You must select one expire time param and it must be more than zero.",
             )
@@ -51,9 +57,6 @@ def __init__(
                 "Choose either result_ex_time or result_px_time.",
             )
 
-        if not self.result_ex_time and not self.result_px_time:
-            self.result_ex_time = 60
-
     async def shutdown(self) -> None:
         """Closes redis connection."""
         await self.redis_pool.disconnect()

tests/test_backend.py

@@ -132,7 +132,13 @@ async def test_cant_specify_ex_and_px_params(
 
 
 @pytest.mark.anyio
+@pytest.mark.parametrize(
+    "ex_time, px_time",
+    [(0, 0), (-500, 0), (0, -500), (-500, -500)],
+)
 async def test_ex_or_px_must_be_more_than_zero(
+    ex_time: int,
+    px_time: int,
     redis_url: str,
 ) -> None:
     """
@@ -143,8 +149,8 @@ async def test_ex_or_px_must_be_more_than_zero(
     with pytest.raises(ExpireTimeMustBeMoreThanZeroError):
         RedisAsyncResultBackend(
             redis_url,
-            result_ex_time=0,
-            result_px_time=0,
+            result_ex_time=ex_time,
+            result_px_time=px_time,
         )