activerecord/CHANGELOG.md


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*   Ensure hashes can be assigned to attributes created using `composed_of`.
    Fixes #25210.

    *Sean Griffin*

*   Fix logging edge case where if an attribute was of the binary type and
    was provided as a Hash.

    *Jon Moss*

*   Handle JSON deserialization correctly if the column default from database
    adapter returns `''` instead of `nil`.

    *Johannes Opper*

*   Introduce ActiveRecord::TransactionSerializationError for catching
    transaction serialization failures or deadlocks.

    *Erol Fornoles*

Please check [5-0-stable](https://github.com/rails/rails/blob/5-0-stable/activerecord/CHANGELOG.md) for previous changes.