spec:v1:sqlite3 works for running our specs

Rakefile

@@ -41,6 +41,18 @@ else
 
       desc "Run specs with the #{adapter} database adapter"
       task adapter => "set_env_for_#{adapter}"
+
+      namespace :v1 do
+        Spec::Rake::SpecTask.new(adapter) do |t|
+          t.spec_opts = ['--options', "\"#{File.dirname(__FILE__)}/spec/spec.opts\""]
+          t.libs << "#{File.dirname(__FILE__)}/spec"
+          t.warning    = true
+          t.spec_files = FileList['spec/arel/**/*_spec.rb']
+        end
+
+        desc "Run specs with the #{adapter} database adapter"
+        task adapter => "set_env_for_#{adapter}"
+      end
     end
   end
 

lib/arel/attributes/attribute.rb

@@ -4,6 +4,10 @@ module Arel
       def eq other
         Nodes::Equality.new self, other
       end
+
+      def in other
+        Nodes::In.new self, other
+      end
     end
 
     class String  < Attribute; end

lib/arel/nodes.rb

@@ -1,4 +1,5 @@
 require 'arel/nodes/equality'
+require 'arel/nodes/in'
 require 'arel/nodes/sql_literal'
 require 'arel/nodes/select_core'
 require 'arel/nodes/select_statement'

lib/arel/nodes/in.rb

@@ -0,0 +1,6 @@
+module Arel
+  module Nodes
+    class In < Equality
+    end
+  end
+end

lib/arel/visitors/to_sql.rb

@@ -56,6 +56,10 @@ module Arel
         quote_table_name o.name
       end
 
+      def visit_Arel_Nodes_In o
+        "#{visit o.left} IN (#{o.right.map { |x| quote visit x }.join ', '})"
+      end
+
       def visit_Arel_Nodes_Equality o
         "#{visit o.left} = #{quote visit o.right}"
       end