Sourced from actionview's releases.

8.1.3

Active Support

• Fix JSONGemCoderEncoder to correctly serialize custom object hash keys.

  When hash keys are custom objects whose as_json returns a Hash, the encoder now calls to_s on the original key object instead of on the as_json result.

  Before: hash = {CustomKey.new(123) => "value"} hash.to_json # => {"{:id=>123}":"value"}

  After: hash.to_json # => {"custom_123":"value"}

  Dan Sharp

• Fix inflections to better handle overlapping acronyms.

  ActiveSupport::Inflector.inflections(:en) do |inflect|
    inflect.acronym "USD"
    inflect.acronym "USDC"
  end
  "USDC".underscore # => "usdc"

  Said Kaldybaev

• Silence Dalli 4.0+ warning when using ActiveSupport::Cache::MemCacheStore.

  zzak

Active Model

• Fix Ruby 4.0 delegator warning when calling inspect on attributes.

  Hammad Khan

• Fix NoMethodError when deserialising Type::Integer objects marshalled under Rails 8.0.

  The performance optimisation that replaced @range with @max/@min broke Marshal compatibility. Objects serialised under 8.0 (with @range) and deserialised under 8.1 (expecting @max/@min) would crash with undefined method '<=' for nil because Marshal.load restores instance variables without calling initialize.

... (truncated)

Sourced from actionview's changelog.

Rails 8.1.3 (March 24, 2026)

• Fix encoding errors for string locals containing non-ASCII characters.

  Kataoka Katsuki

• Fix collection caching to only forward expires_in argument if explicitly set.

  Pieter Visser

• fa8f081 Preparing for 8.1.3 release
• 63cef3d Merge branch '8-1-sec' into 8-1-stable
• e598b94 Merge pull request #56906 from kataokatsuki/fix-strict-locals-non-ascii-encoding
• c2ea79c Merge pull request #56891 from pietervisser/fix-collection-caching-to-preserv...
• See full diff in compare view

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