Decide status_field in base class

airflow/providers/amazon/aws/sensors/rds.py

@@ -61,20 +61,19 @@ def _describe_item(self, item_type: str, item_name: str) -> list:
 
     def _check_item(self, item_type: str, item_name: str) -> bool:
         """Get certain item from `_describe_item()` and check its status"""
+        if item_type == "db_instance":
+            status_field = "DBInstanceStatus"
+        else:
+            status_field = "Status"
         try:
             items = self._describe_item(item_type, item_name)
         except ClientError:
             return False
         else:
-            status_field = self._check_status_field()
             return bool(items) and any(
                 map(lambda status: items[0][status_field].lower() == status, self.target_statuses)
             )
 
-    def _check_status_field(self) -> str:
-        """Return the name of the '_describe_item' response field that corresponds to the resource status."""
-        return "Status"
-
 
 class RdsSnapshotExistenceSensor(RdsBaseSensor):
     """
@@ -195,11 +194,6 @@ def poke(self, context: 'Context'):
         item_type = self._check_item_type()
         return self._check_item(item_type=item_type, item_name=self.db_identifier)
 
-    def _check_status_field(self) -> str:
-        if self.db_type == RdsDbType.INSTANCE:
-            return "DBInstanceStatus"
-        return "Status"
-
     def _check_item_type(self):
         if self.db_type == RdsDbType.CLUSTER:
             return "db_cluster"