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dry-struct v1.4.0 Release Notes

Release Date: 2021-01-21 // over 3 years ago

➕ Added
- 👌 Support for wrapping constructors and fallbacks, see release notes for dry-types 1.5.0 (@flash-gordon)
- 👌 Improvements of the attribute DSL, now it's possible to use optional structs as a base class (@flash-gordon) ```ruby class User < Dry::Struct attribute :name, Types::String attribute :address, Dry::Struct.optional do attribute :city, Types::String end end
User.new(name: "John", address: nil) # => #
```
[Compare v1.3.0...v1.4.0](https://github.com/dry-rb/dry-struct/compare/v1.3.0...v1.4.0)
```

Previous changes from v1.3.0

➕ Added

Nested structures will reuse type and key transformations from the enclosing struct (@flash-gordon)

  class User < Dry::Struct
    transform_keys(&:to_sym)

    attribute :name, Types::String
    attribute :address do
      # this struct will inherit transform_keys(&:to_sym)
      attribute :city, Types::String
    end

    # nested struct will _not_ transform keys because a parent
    # struct is given
    attribute :contacts, Dry::Struct do
      attribute :email, Types::String
    end
  end

Dry::Struct::Constructor finally acts like a fully-featured type (@flash-gordon)
0️⃣ Dry::Struct.abstract declares a struct class as abstract. An abstract class is used as a default superclass for nested structs (@flash-gordon)
Dry::Struct.to_ast and struct compiler (@flash-gordon)
Struct composition with Dry::Struct.attributes_from. It's more flexible than inheritance (@waiting-for-dev + @flash-gordon)

  class Address < Dry::Struct
    attribute :city, Types::String
    attribute :zipcode, Types::String
  end

  class Buyer < Dry::Struct
    attribute :name, Types::String
    attributes_from Address
  end

  class Seller < Dry::Struct
    attribute :name, Types::String
    attribute :email, Types::String
    attributes_from Address
  end

🔄 Changed

📇 [internal] metadata is now stored inside schema (@flash-gordon)

Compare v1.2.0...v1.3.0