Fix backwards compatibility without providing prefix since boto3 does more parameter validation than boto (#45308)

Use .get() instead of assuming a rule has a Transitions or Filter key (both of which are optional)

lib/ansible/modules/cloud/amazon/s3_lifecycle.py

@@ -207,7 +207,7 @@ def create_lifecycle_rule(client, module):
     noncurrent_version_transition_days = module.params.get("noncurrent_version_transition_days")
     noncurrent_version_transitions = module.params.get("noncurrent_version_transitions")
     noncurrent_version_storage_class = module.params.get("noncurrent_version_storage_class")
-    prefix = module.params.get("prefix")
+    prefix = module.params.get("prefix") or ""
     rule_id = module.params.get("rule_id")
     status = module.params.get("status")
     storage_class = module.params.get("storage_class")
@@ -280,7 +280,9 @@ def create_lifecycle_rule(client, module):
     if current_lifecycle_rules:
         # If rule ID exists, use that for comparison otherwise compare based on prefix
         for existing_rule in current_lifecycle_rules:
-            if rule['Filter']['Prefix'] == existing_rule['Filter']['Prefix']:
+            if rule.get('ID') == existing_rule.get('ID') and rule['Filter']['Prefix'] != existing_rule.get('Filter', {}).get('Prefix', ''):
+                existing_rule.pop('ID')
+            elif rule_id is None and rule['Filter']['Prefix'] == existing_rule.get('Filter', {}).get('Prefix', ''):
                 existing_rule.pop('ID')
             if rule.get('ID') == existing_rule.get('ID'):
                 changed_, appended_ = update_or_append_rule(rule, existing_rule, purge_transitions, lifecycle_configuration)
@@ -361,9 +363,9 @@ def merge_transitions(updated_rule, updating_rule):
     # in updating_rule to updated_rule
     updated_transitions = {}
     updating_transitions = {}
-    for transition in updated_rule['Transitions']:
+    for transition in updated_rule.get('Transitions', []):
         updated_transitions[transition['StorageClass']] = transition
-    for transition in updating_rule['Transitions']:
+    for transition in updating_rule.get('Transitions', []):
         updating_transitions[transition['StorageClass']] = transition
     for storage_class, transition in updating_transitions.items():
         if updated_transitions.get(storage_class) is None:

test/integration/targets/s3_lifecycle/tasks/main.yml

@@ -30,7 +30,7 @@
       s3_lifecycle:
         name: "{{ resource_prefix }}-testbucket-ansible"
         expiration_days: 300
-        prefix: /pre
+        prefix: ''
         <<: *aws_connection_info
       register: output
 
@@ -42,7 +42,6 @@
       s3_lifecycle:
         name: "{{ resource_prefix }}-testbucket-ansible"
         expiration_days: 300
-        prefix: /pre
         <<: *aws_connection_info
       register: output