小编Vad*_*ich的帖子

我有这个模型和多对多关联：通过：

class RailwayStation < ActiveRecord::Base
  has_many :railway_stations_routes
  has_many :routes, through: :railway_stations_routes
end

class Route < ActiveRecord::Base
  has_many :railway_stations_routes
  has_many :railway_stations, through: :railway_stations_routes
end

class RailwayStationsRoute < ActiveRecord::Base
  belongs_to :railway_station
  belongs_to :route
end

我添加了列st_index：

add_column :railway_stations_routes, :st_index, :integer

对于路线中的索引站，但我不明白如何从路线视图形式更改它：

ul
  - @route.railway_stations.each do |railway_station|
   li = railway_station.title
      = ????