class Tapioca::Dsl::Compilers::ActiveRecordEnum

~~~
end
end
def web_title?; end
sig { returns(T::Boolean) }
def web_title!; end
sig { void }
def book_title?; end
sig { returns(T::Boolean) }
def book_title!; end
sig { void }
def self.title_types; end
sig { returns(T::Hash[T.any(String, Symbol), Integer]) }
def all_title?; end
sig { returns(T::Boolean) }
def all_title!; end
sig { void }
module EnumMethodsModule
include EnumMethodsModule
class Post
# typed: true
# post.rbi
~~~rbi
this compiler will produce the RBI file ‘post.rbi` with the following content:
~~~
end
enum title_type: %i(book all web), _suffix: :title
class Post < ApplicationRecord
~~~rb
For example, with the following `ActiveRecord::Base` subclass:
`ActiveRecord::Base` which declare [`enum` fields](api.rubyonrails.org/classes/ActiveRecord/Enum.html).
`Tapioca::Dsl::Compilers::ActiveRecordEnum` decorates RBI files for subclasses of

def decorate 

def decorate
  return if constant.defined_enums.empty?
  root.create_path(constant) do |model|
    module_name = "EnumMethodsModule"
    model.create_module(module_name) do |mod|
      generate_instance_methods(mod)
    end
    model.create_include(module_name)
    constant.defined_enums.each do |name, enum_map|
      type = type_for_enum(enum_map)
      model.create_method(name.pluralize, class_method: true, return_type: type)
    end
  end
end

def gather_constants 

def gather_constants
  descendants_of(::ActiveRecord::Base)
end

def generate_instance_methods(klass) 

def generate_instance_methods(klass)
  methods = constant.send(:_enum_methods_module).instance_methods
  methods.each do |method|
    method = method.to_s
    return_type = method.end_with?("?") ? "T::Boolean" : "void"
    klass.create_method(method, return_type: return_type)
  end
end

def type_for_enum(enum_map) 

def type_for_enum(enum_map)
  value_type = enum_map.values.map { |v| v.class.name }.uniq
  value_type = if value_type.length == 1
    value_type.first
  else
    "T.any(#{value_type.join(", ")})"
  end
  "T::Hash[T.any(String, Symbol), #{value_type}]"
end