Fix loading cached JSON content when decode_content=True and the root element is a list

2 files changed, 9 insertions, 4 deletions

diff --git a/requests_cache/models/response.py b/requests_cache/models/response.py
index 2cd6047..134d04b 100755
--- a/requests_cache/models/response.py
+++ b/requests_cache/models/response.py
@@ -18,7 +18,7 @@ if TYPE_CHECKING:
     from ..policy.actions import CacheActions
 
 DATETIME_FORMAT = '%Y-%m-%d %H:%M:%S %Z'  # Format used for __str__ only
-DecodedContent = Union[Dict, str, None]
+DecodedContent = Union[Dict, List, str, None]
 logger = getLogger(__name__)
 
 
diff --git a/requests_cache/serializers/cattrs.py b/requests_cache/serializers/cattrs.py
index bf45c2d..439463e 100644
--- a/requests_cache/serializers/cattrs.py
+++ b/requests_cache/serializers/cattrs.py
@@ -109,9 +109,12 @@ def init_converter(
     converter.register_structure_hook(
         CaseInsensitiveDict, lambda obj, cls: CaseInsensitiveDict(obj)
     )
-    # Convert decoded JSON body back to string
+
+    # Convert decoded JSON body back to a string. If the object is a valid JSON root (dict or list),
+    # that means it was previously saved in human-readable format due to `decode_content=True`.
+    # After this hook runs, the body will also be re-encoded with `_encode_content()`.
     converter.register_structure_hook(
-        DecodedContent, lambda obj, cls: json.dumps(obj) if isinstance(obj, dict) else obj
+        DecodedContent, lambda obj, cls: json.dumps(obj) if isinstance(obj, (dict, list)) else obj
     )
 
     # Resolve forward references (required for CachedResponse.history)
@@ -157,7 +160,9 @@ def _decode_content(response: CachedResponse, response_dict: Dict) -> Dict:
 
 
 def _encode_content(response: CachedResponse) -> CachedResponse:
-    """Re-encode response body if saved as JSON or text; has no effect for a binary response body"""
+    """Re-encode response body if saved as JSON or text (via ``decode_content=True``).
+    This has no effect for a binary response body.
+    """
     if isinstance(response._decoded_content, str):
         response._content = response._decoded_content.encode('utf-8')
         response._decoded_content = None