I updated my rails from 2.0.2 to 2.3.4 yesterday. Then I found something strange. I write transaction use ActiveRecord::Base.transaction block like below:

  def action_name     begin      ActiveRecord::Base.transaction do        object1.destroy!      end       render :json => {:success => true}.to_json,:layout=>false     rescue Exception => exc       render :json => {:success => false,:errors=>exc.message}.to_json,:layout=>false     end   end

It works better at 2.0.2, but the transaction did no work at 2.3.4. If the! faile and raise exception, the transaction did not rollback.

Is there some setting or config I must edit?