Add MySQL specific active_record_load_schema (stop using default null

for id column)

spec/support/active_record/mysql2_setup.rb

@@ -1,6 +1,6 @@
 require 'support/active_record/database_setup'
 require 'support/active_record/schema_setup'
-
+require 'support/active_record/mysql_schema_setup'
 
 module MySQL2Helper
   puts "Active Record #{ActiveRecord::VERSION::STRING}, mysql2"

spec/support/active_record/mysql_schema_setup.rb

@@ -0,0 +1,12 @@
+def active_record_load_schema
+  ActiveRecord::Schema.define do
+    create_table :users, :id => false, :force => true do |t|
+      t.column :id, "int(11) auto_increment PRIMARY KEY"
+      t.integer :name
+    end
+
+    create_table :agents, :id => false, :force => true do |t|
+      t.integer :name
+    end
+  end
+end

spec/support/active_record/mysql_setup.rb

@@ -1,5 +1,6 @@
 require 'support/active_record/database_setup'
 require 'support/active_record/schema_setup'
+require 'support/active_record/mysql_schema_setup'
 
 module MySQLHelper
   puts "Active Record #{ActiveRecord::VERSION::STRING}, mysql"