.github/workflows/ci.yml

@@ -8,7 +8,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 4.0.0
+          ruby-version: 3.4.4
       - name: Install dependencies
         run: bundle install --jobs 4 --retry 3
       - name: Run Danger
@@ -21,18 +21,13 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: [4.0.0, 3.4.8, 3.3.10, 3.2.9]
-        grape-version: ['~> 3.0.0', '~> 2.3.0']
+        ruby-version: [3.4.4, 3.3.8, 3.2.8, 3.1.7]
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby-version }}
       - name: Install dependencies
         run: bundle install --jobs 4 --retry 3
-        env:
-          GRAPE_VERSION: ${{ matrix.grape-version }}
       - name: Run tests
         run: bundle exec rake
-        env:
-          GRAPE_VERSION: ${{ matrix.grape-version }}

CHANGELOG.md

@@ -1,14 +1,5 @@
 ## Changelog
 
-### 2.0.2 (Next)
-
-* Your contribution here.
-
-### 2.0.1 (2025/12/08)
-
-* [#92](https://github.com/ruby-grape/grape-active_model_serializers/pull/92): Fix: accept nil serializer - [@mateusnava](https://github.com/mateusnava).
-* [#100](https://github.com/ruby-grape/grape-active_model_serializers/pull/100): Fix compatibility with Grape 3.0 and test in CI - [@samsonjs](https://github.com/samsonjs).
-
 ### 2.0.0 (2025/06/02)
 
 * [#96](https://github.com/ruby-grape/grape-active_model_serializers/pull/96): Add compatibility for Grape 2.3 - [@samsonjs](https://github.com/samsonjs).

Gemfile

@@ -2,7 +2,7 @@ source 'https://rubygems.org'
 
 gemspec
 
-case version = ENV['GRAPE_VERSION'] || '~> 3.0.0'
+case version = ENV['GRAPE_VERSION'] || '~> 2.3.0'
 when 'HEAD'
   gem 'grape', github: 'intridea/grape'
 else

lib/grape-active_model_serializers/options_builder.rb

@@ -49,7 +49,11 @@ module Grape
       end
 
       def innermost_scope
-        endpoint.inheritable_setting.namespace_stackable[:namespace]&.last
+        if endpoint.respond_to?(:namespace_stackable)
+          endpoint.namespace_stackable(:namespace).last
+        else
+          endpoint.settings.peek[:namespace]
+        end
       end
 
       def meta_options

lib/grape-active_model_serializers/serializer_resolver.rb

@@ -17,14 +17,12 @@ module Grape
       def serializer_class
         return @serializer_class if defined?(@serializer_class)
 
-        return nil if options.key?(:serializer) && options[:serializer].nil?
-
-        @serializer_class = resource_defined_class ||
-                            collection_class ||
-                            options[:serializer] ||
-                            namespace_inferred_class ||
-                            version_inferred_class ||
-                            resource_serializer_class
+        @serializer_class = resource_defined_class
+        @serializer_class ||= collection_class
+        @serializer_class ||= options[:serializer]
+        @serializer_class ||= namespace_inferred_class
+        @serializer_class ||= version_inferred_class
+        @serializer_class ||= resource_serializer_class
       end
 
       def serializer_options

lib/grape-active_model_serializers/version.rb

@@ -1,5 +1,5 @@
 module Grape
   module ActiveModelSerializers
-    VERSION = '2.0.2'.freeze
+    VERSION = '2.0.0'.freeze
   end
 end

spec/grape/active_model_serializers/serializer_resolver_spec.rb

@@ -52,18 +52,6 @@ describe Grape::ActiveModelSerializers::SerializerResolver do
         expect(serializer).to be_kind_of(serializer_class)
       end
 
-      context 'specified nil by options' do
-        let(:options) {
-          super().merge(
-            serializer: nil
-          )
-        }
-
-        it 'returns nil' do
-          expect(serializer).to be_nil
-        end
-      end
-
       context 'each serializer' do
         let(:options) {
           super().except(:serializer).merge(

spec/integration/sequel_spec.rb

@@ -22,7 +22,6 @@ describe 'Sequel Integration' do
   let!(:model) {
     SequelUser = Class.new(Sequel::Model(:users)) do
       include ActiveModel::Serialization
-
       def self.model_name
         'User'
       end