Add support for rails 8.1

Fixes #6

Author: bassemawhoob

.github/workflows/build.yml

@@ -20,12 +20,14 @@ jobs:
       matrix:
         os: [ubuntu-latest]
         ruby: [2.7, 3.1, 3.4]
-        gemfile: [ar6, ar7, ar8]
+        gemfile: [ar6, ar7, ar8, ar8_1]
         exclude:
           - ruby: 2.7
             gemfile: ar8
           - ruby: 3.1
             gemfile: ar8
+          - ruby: 3.1
+            gemfile: ar8_1
           - ruby: 3.4
             gemfile: ar6
     runs-on: ${{ matrix.os }}

lib/tableless/connection.rb

@@ -1,6 +1,5 @@
 # frozen_string_literal: true
 
-require 'tableless/connection_adapters/schema_cache'
 require 'tableless/connection_adapters/dummy_adapter'
 
 module Tableless

lib/tableless/connection_adapters/dummy_adapter.rb

@@ -1,12 +1,16 @@
 # frozen_string_literal: true
 
+require 'tableless/connection_adapters/schema_cache'
+require 'tableless/connection_adapters/null_pool'
+
 module Tableless
   class DummyAdapter < ActiveRecord::ConnectionAdapters::AbstractAdapter
     DbConfig = Struct.new(:adapter)
 
     def initialize(*)
       super
       @schema_cache = Tableless::SchemaCache.new
+      @pool = Tableless::NullPool.new
     end
 
     def schema_cache

lib/tableless/connection_adapters/null_pool.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+module Tableless
+  class NullPool < ActiveRecord::ConnectionAdapters::NullPool
+    def with_pool_transaction_isolation_level(*)
+      yield self
+    end
+  end
+end

tableless.gemspec

@@ -18,7 +18,7 @@ Gem::Specification.new do |spec|
 
   spec.required_ruby_version = '>= 2.6'
 
-  spec.add_dependency 'activerecord', '>= 6.0', '< 8.1'
+  spec.add_dependency 'activerecord', '>= 6.0', '< 8.2'
 
   spec.add_development_dependency 'bundler', '~> 2.0'
   spec.add_development_dependency 'minitest', '~> 5.0'

test/gemfiles/ar8_1.gemfile

@@ -0,0 +1,8 @@
+# frozen_string_literal: true
+
+source 'https://rubygems.org'
+
+gem 'activerecord', '~> 8.1'
+gem 'concurrent-ruby', '< 1.3.5'
+gem 'minitest'
+gem 'rake'