Tapioca DSL Compiler for StoreModel

A Tapioca DSL compiler that generates RBI files for StoreModel attributes in ActiveRecord models.

Add this line to your application's Gemfile:

gem 'tapioca_dsl_compiler_store_model'

And then execute:

$ bundle install

Or install it yourself as:

$ gem install tapioca_dsl_compiler_store_model

Once installed, Tapioca will automatically discover and use this compiler when generating RBI files with bundle exec tapioca dsl.

Given the following StoreModel setup:

# app/models/user_settings.rb
class UserSettings
  include StoreModel::Model

  attribute :theme, :string
  attribute :notifications, :boolean
  attribute :language, :string
end

# app/models/preference.rb
class Preference
  include StoreModel::Model

  attribute :key, :string
  attribute :value, :string
end

# app/models/user.rb
class User < ActiveRecord::Base
  attribute :settings, UserSettings.to_type
  attribute :preferences, Preference.to_array_type
end

Running bundle exec tapioca dsl will generate the following RBI file:

# sorbet/rbi/dsl/user.rbi
# typed: strong

class User
  sig { returns(T.nilable(UserSettings)) }
  def settings; end

  sig { params(value: T.nilable(T.any(UserSettings, T::Hash[T.untyped, T.untyped]))).returns(T.nilable(UserSettings)) }
  def settings=(value); end

  sig { params(attributes: T::Hash[T.untyped, T.untyped]).returns(UserSettings) }
  def build_settings(attributes: {}); end

  sig { returns(T::Array[Preference]) }
  def preferences; end

  sig { params(value: T.nilable(T.any(T::Array[Preference], T::Array[T::Hash[T.untyped, T.untyped]]))).returns(T::Array[Preference]) }
  def preferences=(value); end
end

This compiler supports all StoreModel attribute types:

• Single Models: Model.to_type - generates getter, setter, and builder methods
• Array Models: Model.to_array_type - generates getter and setter methods for arrays
• Nested Models: StoreModel classes that contain other StoreModel attributes

For each StoreModel attribute, the compiler generates type signatures for:

1. Getter method: Returns the StoreModel instance or array
2. Setter method: Accepts StoreModel instance(s) or Hash(es)
3. Builder method (single types only): Creates a new instance with given attributes

Currently, this compiler has the following limitations:

• Enum Support: Does not generate RBI signatures for enum methods (e.g., predicate methods like active?, bang methods like status_active!)
• Nested Attributes: Does not support accepts_nested_attributes_for generated methods
• Custom Types: Only supports StoreModel::Types::One and StoreModel::Types::Many, custom types are not detected
• Validation Methods: Does not generate signatures for StoreModel validation methods

These features may be added in future versions.

• Ruby 3.2+
• Tapioca 0.11+
• StoreModel 1.0+

After checking out the repo, run:

$ bundle install

To run the test suite:

$ bundle exec rspec

To run the linter:

$ bundle exec rubocop

Bug reports and pull requests are welcome on GitHub at https://github.com/speria-jp/tapioca_dsl_compiler_store_model.

The gem is available as open source under the terms of the MIT License.