Fix ActionController::ForceSSL compatibility with Rails 8.0+ (Issue #1477)

[takaokouji]

Summary

Fixes ActionController::ForceSSL compatibility issue with Rails 8.0+, addressing part of Issue JSONAPI-Resources#1477.

Issue JSONAPI-Resources#1477

• Problem 1: ActionController::ForceSSL was removed in Rails 8.0, causing uninitialized constant errors
• Problem 2: Validation errors returning status code 0 instead of 422

This PR addresses Problem 1.

Changes

• Added FORCE_SSL_MODULE constant with proper version and existence checking
• Only includes ForceSSL module for Rails < 6.1 where it actually exists
• Uses defined?() check to prevent NameError in Rails 8.0+

Code Changes

# Before (Rails 8.0 error):
Gem::Requirement.new('< 6.1').satisfied_by?(ActionPack.gem_version) ? ActionController::ForceSSL : nil

# After (Rails 8.0 compatible):
FORCE_SSL_MODULE = if Gem::Requirement.new('< 6.1').satisfied_by?(ActionPack.gem_version)
                     defined?(ActionController::ForceSSL) ? ActionController::ForceSSL : nil
                   else
                     nil
                   end

Background

• ActionController::ForceSSL existed in Rails < 6.1
• It was removed in Rails 8.0
• force_ssl functionality is now integrated directly into ActionController::Base

Test Results

Tested on Rails 8.0.4:

• No ForceSSL NameError
• Resource tests pass
• Validation tests pass (returning correct 422 status)

Related

• Upstream Issue: https://github.com/cerebris/jsonapi-resources/issues/1477

Note on Problem 2

The validation status code issue (Problem 2) was not reproducible in our tests. All validation tests correctly return 422 status code on Rails 8.0.4. This may have been fixed in other changes or may require specific reproduction steps.