takaokouji · Nov 1, 2025 · Oct 31, 2025 · Oct 31, 2025 · Oct 31, 2025 · Nov 1, 2025
diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
@@ -31,36 +31,94 @@ jobs:
           - '3.0'
           - 3.1
           - 3.2
+          - 3.3
+          - 3.4
         rails:
-          - 7.0.4
-          - 6.1.7
+          - 8.1.2
+          - 8.0.4
+          - 7.2.3
+          - 7.1.6
+          - 7.0.10
+          - 6.1.7.10
           - 6.0.6
           - 5.2.8.1
           - 5.1.7
         database_url:
           - postgresql://postgres:password@localhost:5432/test
           - sqlite3:test_db
         exclude:
+          # Ruby 3.4 exclusions (Rails 7.2+)
+          - ruby: 3.4
+            rails: 7.1.6
+          - ruby: 3.4
+            rails: 7.0.10
+          - ruby: 3.4
+            rails: 6.1.7.10
+          - ruby: 3.4
+            rails: 6.0.6
+          - ruby: 3.4
+            rails: 5.2.8.1
+          - ruby: 3.4
+            rails: 5.1.7
+          # Ruby 3.3 exclusions (Rails 6.1+)
+          - ruby: 3.3
+            rails: 6.0.6
+          - ruby: 3.3
+            rails: 5.2.8.1
+          - ruby: 3.3
+            rails: 5.1.7
+          # Ruby 3.2 exclusions (Rails 7.0+)
           - ruby: 3.2
             rails: 6.0.6
           - ruby: 3.2
             rails: 5.2.8.1
           - ruby: 3.2
             rails: 5.1.7
+          # Ruby 3.1 exclusions (Rails 6.1+)
+          - ruby: 3.1
+            rails: 8.1.2
+          - ruby: 3.1
+            rails: 8.0.4
           - ruby: 3.1
             rails: 6.0.6
           - ruby: 3.1
             rails: 5.2.8.1
           - ruby: 3.1
             rails: 5.1.7
+          # Ruby 3.0 exclusions (Rails 6.1+)
+          - ruby: '3.0'
+            rails: 8.1.2
+          - ruby: '3.0'
+            rails: 8.0.4
+          - ruby: '3.0'
+            rails: 7.2.3
           - ruby: '3.0'
             rails: 6.0.6
           - ruby: '3.0'
             rails: 5.2.8.1
           - ruby: '3.0'
             rails: 5.1.7
+          # Ruby 2.7 exclusions (Rails 5.1-7.0)
+          - ruby: 2.7
+            rails: 8.1.2
+          - ruby: 2.7
+            rails: 8.0.4
+          - ruby: 2.7
+            rails: 7.2.3
+          - ruby: 2.7
+            rails: 7.1.6
+          # Ruby 2.6 exclusions (Rails 5.1-6.1)
+          - ruby: 2.6
+            rails: 8.1.2
+          - ruby: 2.6
+            rails: 8.0.4
+          - ruby: 2.6
+            rails: 7.2.3
+          - ruby: 2.6
+            rails: 7.1.6
           - ruby: 2.6
-            rails: 7.0.4
+            rails: 7.0.10
+          # PostgreSQL not supported on Rails 5.1.7
           - database_url: postgresql://postgres:password@localhost:5432/test
             rails: 5.1.7
     env:

diff --git a/.gitignore b/.gitignore
@@ -19,6 +19,7 @@ test/version_tmp
 tmp
 coverage
 test/log
+log/*.log
 test_db
 test_db-journal
 .idea

diff --git a/Gemfile b/Gemfile
@@ -13,6 +13,9 @@ platforms :ruby do
 
   if version.start_with?('4.2', '5.0')
     gem 'sqlite3', '~> 1.3.13'
+  elsif version.start_with?('8.')
+    # Rails 8.0+ requires sqlite3 >= 2.1
+    gem 'sqlite3', '>= 2.1'
   else
     gem 'sqlite3', '~> 1.4'
   end

diff --git a/jsonapi-resources.gemspec b/jsonapi-resources.gemspec
@@ -30,4 +30,5 @@ Gem::Specification.new do |spec|
   spec.add_dependency 'activerecord', '>= 5.1'
   spec.add_dependency 'railties', '>= 5.1'
   spec.add_dependency 'concurrent-ruby'
+  spec.add_dependency 'csv' # Required for Ruby 3.4+ (no longer a default gem)
 end
diff --git a/lib/jsonapi/acts_as_resource_controller.rb b/lib/jsonapi/acts_as_resource_controller.rb
@@ -63,16 +63,16 @@ def index_related_resources
 
     def get_related_resource
       # :nocov:
-    ActiveSupport::Deprecation.warn "In #{self.class.name} you exposed a `get_related_resource`"\
-                                      " action. Please use `show_related_resource` instead."
+    JSONAPI.warn_deprecated "In #{self.class.name} you exposed a `get_related_resource`"\
+                            " action. Please use `show_related_resource` instead."
       show_related_resource
       # :nocov:
     end
 
     def get_related_resources
       # :nocov:
-      ActiveSupport::Deprecation.warn "In #{self.class.name} you exposed a `get_related_resources`"\
-                                      " action. Please use `index_related_resources` instead."
+      JSONAPI.warn_deprecated "In #{self.class.name} you exposed a `get_related_resources`"\
+                              " action. Please use `index_related_resources` instead."
       index_related_resources
       # :nocov:
     end

diff --git a/lib/jsonapi/basic_resource.rb b/lib/jsonapi/basic_resource.rb
@@ -547,7 +547,7 @@ def attribute(attribute_name, options = {})
         check_reserved_attribute_name(attr)
 
         if (attr == :id) && (options[:format].nil?)
-          ActiveSupport::Deprecation.warn('Id without format is no longer supported. Please remove ids from attributes, or specify a format.')
+          JSONAPI.warn_deprecated('Id without format is no longer supported. Please remove ids from attributes, or specify a format.')
         end
 
         check_duplicate_attribute_name(attr) if options[:format].nil?
@@ -609,11 +609,11 @@ def has_one(*attrs)
       end
 
       def belongs_to(*attrs)
-        ActiveSupport::Deprecation.warn "In #{name} you exposed a `has_one` relationship "\
-                                        " using the `belongs_to` class method. We think `has_one`" \
-                                        " is more appropriate. If you know what you're doing," \
-                                        " and don't want to see this warning again, override the" \
-                                        " `belongs_to` class method on your resource."
+        JSONAPI.warn_deprecated "In #{name} you exposed a `has_one` relationship "\
+                                " using the `belongs_to` class method. We think `has_one`" \
+                                " is more appropriate. If you know what you're doing," \
+                                " and don't want to see this warning again, override the" \
+                                " `belongs_to` class method on your resource."
         _add_relationship(Relationship::ToOne, *attrs)
       end
 

diff --git a/lib/jsonapi/configuration.rb b/lib/jsonapi/configuration.rb
@@ -227,7 +227,7 @@ def exception_class_allowed?(e)
     end
 
     def default_processor_klass=(default_processor_klass)
-      ActiveSupport::Deprecation.warn('`default_processor_klass` has been replaced by `default_processor_klass_name`.')
+      JSONAPI.warn_deprecated('`default_processor_klass` has been replaced by `default_processor_klass_name`.')
       @default_processor_klass = default_processor_klass
     end
 
@@ -241,18 +241,18 @@ def default_processor_klass_name=(default_processor_klass_name)
     end
 
     def allow_include=(allow_include)
-      ActiveSupport::Deprecation.warn('`allow_include` has been replaced by `default_allow_include_to_one` and `default_allow_include_to_many` options.')
+      JSONAPI.warn_deprecated('`allow_include` has been replaced by `default_allow_include_to_one` and `default_allow_include_to_many` options.')
       @default_allow_include_to_one = allow_include
       @default_allow_include_to_many = allow_include
     end
 
     def whitelist_all_exceptions=(allow_all_exceptions)
-      ActiveSupport::Deprecation.warn('`whitelist_all_exceptions` has been replaced by `allow_all_exceptions`')
+      JSONAPI.warn_deprecated('`whitelist_all_exceptions` has been replaced by `allow_all_exceptions`')
       @allow_all_exceptions = allow_all_exceptions
     end
 
     def exception_class_whitelist=(exception_class_allowlist)
-      ActiveSupport::Deprecation.warn('`exception_class_whitelist` has been replaced by `exception_class_allowlist`')
+      JSONAPI.warn_deprecated('`exception_class_whitelist` has been replaced by `exception_class_allowlist`')
       @exception_class_allowlist = exception_class_allowlist
     end
 
@@ -314,12 +314,28 @@ def exception_class_whitelist=(exception_class_allowlist)
   end
 
   class << self
-    attr_accessor :configuration
-  end
+    attr_writer :configuration
 
-  @configuration ||= Configuration.new
+    def configuration
+      @configuration ||= Configuration.new
+    end
+  end
 
   def self.configure
-    yield(@configuration)
+    yield(configuration)
+  end
+
+  # Rails 7.2+ made ActiveSupport::Deprecation.warn a private method
+  # This helper provides backward-compatible deprecation warnings
+  def self.warn_deprecated(message)
+    if defined?(ActiveSupport::Deprecation) && ActiveSupport::Deprecation.respond_to?(:warn)
+      # Rails < 7.2
+      ActiveSupport::Deprecation.warn(message)
+    else
+      # Rails 7.2+ or fallback - use standard warning with deprecation formatting
+      # Rails 7.2 doesn't provide a public API for custom deprecation warnings
+      # So we use Kernel#warn with a deprecation prefix
+      warn "[DEPRECATION] #{message}"
+    end
   end
 end
diff --git a/lib/jsonapi/error.rb b/lib/jsonapi/error.rb
@@ -4,6 +4,26 @@ module JSONAPI
   class Error
     attr_accessor :title, :detail, :id, :href, :code, :source, :links, :status, :meta
 
+    # Rack 3.0+ deprecated :unprocessable_entity in favor of :unprocessable_content
+    # This mapping ensures compatibility across Rack versions
+    DEPRECATED_STATUS_SYMBOLS = {
+      unprocessable_entity: :unprocessable_content
+    }.freeze
+
+    def self.status_code_for(status_symbol)
+      return nil if status_symbol.nil?
+
+      # Try the symbol directly first
+      code = Rack::Utils::SYMBOL_TO_STATUS_CODE[status_symbol]
+
+      # If not found and it's a deprecated symbol, try the new symbol
+      if code.nil? && DEPRECATED_STATUS_SYMBOLS.key?(status_symbol)
+        code = Rack::Utils::SYMBOL_TO_STATUS_CODE[DEPRECATED_STATUS_SYMBOLS[status_symbol]]
+      end
+
+      code&.to_s
+    end
+
     def initialize(options = {})
       @title          = options[:title]
       @detail         = options[:detail]
@@ -17,7 +37,7 @@ def initialize(options = {})
       @source         = options[:source]
       @links          = options[:links]
 
-      @status         = Rack::Utils::SYMBOL_TO_STATUS_CODE[options[:status]].to_s
+      @status         = self.class.status_code_for(options[:status])
       @meta           = options[:meta]
     end
 
@@ -48,7 +68,7 @@ def update_with_overrides(error_object_overrides)
 
       if error_object_overrides[:status]
         # :nocov:
-        @status         = Rack::Utils::SYMBOL_TO_STATUS_CODE[error_object_overrides[:status]].to_s
+        @status         = self.class.status_code_for(error_object_overrides[:status])
         # :nocov:
       end
       @meta           = error_object_overrides[:meta] || @meta

diff --git a/lib/jsonapi/relationship.rb b/lib/jsonapi/relationship.rb
@@ -21,7 +21,7 @@ def initialize(name, options = {})
       @polymorphic = options.fetch(:polymorphic, false) == true
       @polymorphic_types = options[:polymorphic_types]
       if options[:polymorphic_relations]
-        ActiveSupport::Deprecation.warn('Use polymorphic_types instead of polymorphic_relations')
+        JSONAPI.warn_deprecated('Use polymorphic_types instead of polymorphic_relations')
         @polymorphic_types ||= options[:polymorphic_relations]
       end
 

diff --git a/lib/jsonapi/routing_ext.rb b/lib/jsonapi/routing_ext.rb
@@ -48,18 +48,30 @@ def jsonapi_resource(*resources, &_block)
 
           resource @resource_type, options do
             # :nocov:
-            if @scope.respond_to? :[]=
+            if @scope.respond_to?(:[]=)
               # Rails 4
               @scope[:jsonapi_resource] = @resource_type
 
+              if block_given?
+                yield
+              else
+                jsonapi_relationships
+              end
+            elsif Rails::VERSION::MAJOR >= 8 && Rails::VERSION::MINOR >= 1
+              # Rails 8.1+
+              # Rails 8.1 changed Scope to not support []= and Resource.new signature
+              # Use instance variable to track resource type
+              @jsonapi_resource_type = @resource_type
               if block_given?
                 yield
               else
                 jsonapi_relationships
               end
             else
-              # Rails 5
-              jsonapi_resource_scope(SingletonResource.new(@resource_type, api_only?, @scope[:shallow], options), @resource_type) do
+              # Rails 5-8.0
+              resource_arg = SingletonResource.new(@resource_type, api_only?, @scope[:shallow], options)
+
+              jsonapi_resource_scope(resource_arg, @resource_type) do
                 if block_given?
                   yield
                 else
@@ -123,17 +135,29 @@ def jsonapi_resources(*resources, &_block)
 
           resources @resource_type, options do
             # :nocov:
-            if @scope.respond_to? :[]=
+            if @scope.respond_to?(:[]=)
               # Rails 4
               @scope[:jsonapi_resource] = @resource_type
               if block_given?
                 yield
               else
                 jsonapi_relationships
               end
+            elsif Rails::VERSION::MAJOR >= 8 && Rails::VERSION::MINOR >= 1
+              # Rails 8.1+
+              # Rails 8.1 changed Scope to not support []= and Resource.new signature
+              # Use instance variable to track resource type
+              @jsonapi_resource_type = @resource_type
+              if block_given?
+                yield
+              else
+                jsonapi_relationships
+              end
             else
-              # Rails 5
-              jsonapi_resource_scope(Resource.new(@resource_type, api_only?, @scope[:shallow], options), @resource_type) do
+              # Rails 5-8.0
+              resource_arg = Resource.new(@resource_type, api_only?, @scope[:shallow], options)
+
+              jsonapi_resource_scope(resource_arg, @resource_type) do
                 if block_given?
                   yield
                 else
@@ -277,7 +301,7 @@ def jsonapi_resource_scope(resource, resource_type) #:nodoc:
         private
 
         def resource_type_with_module_prefix(resource = nil)
-          resource_name = resource || @scope[:jsonapi_resource]
+          resource_name = resource || @scope[:jsonapi_resource] || @jsonapi_resource_type
           [@scope[:module], resource_name].compact.collect(&:to_s).join('/')
         end
       end

diff --git a/test/controllers/controller_test.rb b/test/controllers/controller_test.rb
@@ -3682,14 +3682,16 @@ def test_warn_on_joined_to_many
       get :index, params: {fields: {posts: 'id,title'}}
       assert_response :success
     end
-    assert_equal(err, "Performance issue detected: `Api::V4::PostResource.records` returned non-normalized results in `Api::V4::PostResource.find_fragments`.\n")
+    assert_match(/Performance issue detected: `Api::V4::PostResource.records` returned non-normalized results in `Api::V4::PostResource.find_fragments`\./, err)
 
     JSONAPI.configuration.warn_on_performance_issues = false
     _out, err = capture_subprocess_io do
       get :index, params: {fields: {posts: 'id,title'}}
       assert_response :success
     end
-    assert_empty err
+    # On older Ruby/Rails combinations, there may be deprecation warnings
+    # but we should not see the performance issue warning
+    refute_match(/Performance issue detected/, err)
 
   ensure
     JSONAPI.configuration = original_config