add extend and include for money-rails and paperclip compilers (#8)

* add extend and include for money-rails and paperclip compilers

* add a spec for paperclip complier

Author: stathis-alexander

lib/tapioca/dsl/compilers/money_rails.rb

@@ -14,6 +14,12 @@ module Compilers
       # by the `money-rails` gem.
       # https://github.com/RubyMoney/money-rails
       #
+      # In order to use this compiler, you will need to add
+      #   `require "money-rails/active_record/monetizable"`
+      # to your `sorbet/tapioca/require.rb` file, since it relies on the module
+      # `MoneyRails::ActiveRecord::Monetizable::ClassMethods` having been detected and sigs generated for it in the gem
+      # rbis.
+      #
       # For example, with the following ActiveRecord model:
       # ~~~rb
       # class Product < ActiveRecord::Base
@@ -48,6 +54,9 @@ class MoneyRails < Tapioca::Dsl::Compiler
           }
         end
 
+        ClassMethodModuleName = "MoneyRails::ActiveRecord::Monetizable::ClassMethods"
+        InstanceModuleName = "MoneyRailsGeneratedMethods"
+
         class << self
           extend T::Sig
 
@@ -77,8 +86,7 @@ def decorate
           return if constant.monetized_attributes.empty?
 
           root.create_path(constant) do |klass|
-            instance_module_name = "MoneyRailsGeneratedMethods"
-            instance_module = RBI::Module.new(instance_module_name)
+            instance_module = RBI::Module.new(InstanceModuleName)
 
             constant.monetized_attributes.each do |attribute_name, column_name|
               if column_type_option.untyped?
@@ -111,7 +119,8 @@ def decorate
             end
 
             klass << instance_module
-            klass.create_include(instance_module_name)
+            klass.create_include(InstanceModuleName)
+            klass.create_extend(ClassMethodModuleName)
           end
         end
       end

lib/tapioca/dsl/compilers/paperclip.rb

@@ -35,7 +35,9 @@ class Paperclip < Tapioca::Dsl::Compiler
         extend T::Sig
         include RBIHelper
 
-        InstanceModuleName = "PaperclipGeneratedMethods"
+        ClassMethodsModuleName = "::Paperclip::Glue"
+        InstanceMethodModuleName = "PaperclipGeneratedMethods"
+
         ConstantType = type_member { { fixed: T.class_of(::Paperclip::Glue) } }
 
         class << self
@@ -55,7 +57,7 @@ def decorate
           return if attachments.empty?
 
           root.create_path(constant) do |klass|
-            instance_module = RBI::Module.new(InstanceModuleName)
+            instance_module = RBI::Module.new(InstanceMethodModuleName)
 
             attachments.each do |attachment_name|
               # Model: has_attached_file(:marketing_image)
@@ -70,7 +72,8 @@ def decorate
             end
 
             klass << instance_module
-            klass.create_include(InstanceModuleName)
+            klass.create_include(ClassMethodsModuleName)
+            klass.create_include(InstanceMethodModuleName)
           end
         end
       end

manual/compiler_moneyrails.md

@@ -4,6 +4,12 @@
 by the `money-rails` gem.
 https://github.com/RubyMoney/money-rails
 
+In order to use this compiler, you will need to add
+  `require "money-rails/active_record/monetizable"`
+to your `sorbet/tapioca/require.rb` file, since it relies on the module
+`MoneyRails::ActiveRecord::Monetizable::ClassMethods` having been detected and sigs generated for it in the gem
+rbis.
+
 For example, with the following ActiveRecord model:
 ~~~rb
 class Product < ActiveRecord::Base