fix tag operations in secretsmanager

moto/secretsmanager/list_secrets/filters.py

@@ -13,19 +13,23 @@ def description_filter(secret: "FakeSecret", descriptions: List[str]) -> bool:
 
 
 def tag_key(secret: "FakeSecret", tag_keys: List[str]) -> bool:
+    if not secret.tags:
+        return False
     return _matcher(tag_keys, [tag["Key"] for tag in secret.tags])
 
 
 def tag_value(secret: "FakeSecret", tag_values: List[str]) -> bool:
+    if not secret.tags:
+        return False
     return _matcher(tag_values, [tag["Value"] for tag in secret.tags])
 
 
 def filter_all(secret: "FakeSecret", values: List[str]) -> bool:
-    attributes = (
-        [secret.name, secret.description]
-        + [tag["Key"] for tag in secret.tags]
-        + [tag["Value"] for tag in secret.tags]
-    )
+    attributes = [secret.name, secret.description]
+    if secret.tags:
+        attributes += [tag["Key"] for tag in secret.tags] + [
+            tag["Value"] for tag in secret.tags
+        ]
 
     return _matcher(values, attributes)  # type: ignore
 

moto/secretsmanager/models.py

@@ -98,7 +98,7 @@
         self.secret_string = secret_string
         self.secret_binary = secret_binary
         self.description = description
-        self.tags = tags or []
+        self.tags = tags or None
         self.kms_key_id = kms_key_id
         self.version_stages = version_stages
         self.last_changed_date = last_changed_date
@@ -158,7 +158,7 @@
         last_changed_date: Optional[int] = None,
     ) -> None:
         self.description = description
-        self.tags = tags or []
+        self.tags = tags or None
         if last_changed_date is not None:
             self.last_changed_date = last_changed_date
 
@@ -236,7 +236,7 @@
             "DeletedDate": self.deleted_date,
             "CreatedDate": self.created_date,
         }
-        if self.tags:
+        if self.tags is not None:
             dct["Tags"] = self.tags
         if self.description:
             dct["Description"] = self.description
@@ -942,20 +942,13 @@
         secret = self.secrets[secret_id]
         if isinstance(secret, ReplicaSecret):
             raise OperationNotPermittedOnReplica
-        old_tags = secret.tags
+
+        old_tags = {tag["Key"]: tag for tag in secret.tags or []}
 
         for tag in tags:
-            existing_key_name = next(
-                (
-                    old_key
-                    for old_key in old_tags
-                    if old_key.get("Key") == tag.get("Key")
-                ),
-                None,
-            )
-            if existing_key_name:
-                old_tags.remove(existing_key_name)
-            old_tags.append(tag)
+            old_tags[tag["Key"]] = tag
+
+        secret.tags = list(old_tags.values())
 
     def untag_resource(self, secret_id: str, tag_keys: List[str]) -> None:
         if secret_id not in self.secrets:
@@ -964,11 +957,11 @@
         secret = self.secrets[secret_id]
         if isinstance(secret, ReplicaSecret):
             raise OperationNotPermittedOnReplica
-        tags = secret.tags
 
-        for tag in tags:
-            if tag["Key"] in tag_keys:
-                tags.remove(tag)
+        if secret.tags is None:
+            return
+
+        secret.tags = [tag for tag in secret.tags if tag["Key"] not in tag_keys]
 
     def update_secret_version_stage(
         self,

tests/test_secretsmanager/test_secretsmanager.py

@@ -1622,6 +1622,10 @@ def test_tag_resource(pass_arn):
     conn = boto3.client("secretsmanager", region_name="us-west-2")
     created_secret = conn.create_secret(Name="test-secret", SecretString="foosecret")
     secret_id = created_secret["ARN"] if pass_arn else "test-secret"
+
+    response = conn.describe_secret(SecretId=secret_id)
+    assert "Tags" not in response
+
     conn.tag_resource(
         SecretId=secret_id, Tags=[{"Key": "FirstTag", "Value": "SomeValue"}]
     )
@@ -1678,6 +1682,14 @@ def test_untag_resource(pass_arn):
         == cm.value.response["Error"]["Message"]
     )
 
+    conn.tag_resource(
+        SecretId=secret_id, Tags=[{"Key": "FirstTag", "Value": "SomeValue"}]
+    )
+    conn.untag_resource(SecretId=secret_id, TagKeys=["FirstTag", "SecondTag"])
+    response = conn.describe_secret(SecretId=secret_id)
+    assert "Tags" in response
+    assert response["Tags"] == []
+
 
 @mock_aws
 def test_secret_versions_to_stages_attribute_discrepancy():