acts_as_list 0.9.19
This "acts_as" extension provides the capabilities for sorting and reordering a number of objects in a list. The class that has this specified needs to have a "position" column defined as an integer on the mapped database table.
          Gemfile:
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          安裝:
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      Runtime 相依性套件 (1):
            activerecord
            >= 3.0
          
    Development 相依性套件 (1):
            bundler
            >= 1.0.0
          
    