diff options
| -rw-r--r-- | doc/build/changelog/unreleased_14/mutable_fix.rst | 9 | ||||
| -rw-r--r-- | lib/sqlalchemy/ext/mutable.py | 10 |
2 files changed, 17 insertions, 2 deletions
diff --git a/doc/build/changelog/unreleased_14/mutable_fix.rst b/doc/build/changelog/unreleased_14/mutable_fix.rst new file mode 100644 index 000000000..2c96878b8 --- /dev/null +++ b/doc/build/changelog/unreleased_14/mutable_fix.rst @@ -0,0 +1,9 @@ +.. change:: + :tags: bug, orm, regression + :tickets: 8133 + + Fixed regression caused by :ticket:`8133` where the pickle format for + mutable attributes was changed, without a fallback to recognize the old + format, causing in-place upgrades of SQLAlchemy to no longer be able to + read pickled data from previous versions. A check plus a fallback for the + old format is now in place. diff --git a/lib/sqlalchemy/ext/mutable.py b/lib/sqlalchemy/ext/mutable.py index 934ac37a0..cbec06a31 100644 --- a/lib/sqlalchemy/ext/mutable.py +++ b/lib/sqlalchemy/ext/mutable.py @@ -502,8 +502,14 @@ class MutableBase(object): def unpickle(state, state_dict): if "ext.mutable.values" in state_dict: - for val in state_dict["ext.mutable.values"][key]: - val._parents[state] = key + collection = state_dict["ext.mutable.values"] + if isinstance(collection, list): + # legacy format + for val in collection: + val._parents[state] = key + else: + for val in state_dict["ext.mutable.values"][key]: + val._parents[state] = key event.listen(parent_cls, "load", load, raw=True, propagate=True) event.listen( |