--新建表：

def up  create_table :[TABLE_NAME] do |t|    t.column :[NUM], :integer    t.column :[NAME], :string    t.column :[TIME], :timestamp    t.column :[ACTIVE], :boolean, :default => true    # 不推荐，用task rake    execute <<-SQL      [SQL-1];      [SQL-2];    SQL        t.timestamps  end    add_index :location_properties, :[NUM]  add_index :location_properties, :[NAME] , :unique => true  enddef down  drop_table :[TABLE_NAME]end

 

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