Rails & JBuildeR语言 以字符串形式输出的 DECIMAL(10,2) 数据类型



我继承的Rails应用程序遇到了问题,而且我没有使用Rails的经验。它使用JBuilder从MySQL数据库返回JSON响应。我更新了应用程序,在数据库中添加了几个类型为DECIMAL(10,2)的新列。问题是,当我请求JSON时,值会以字符串的形式返回。如果我使用DECIMAL(10,0),那么它将作为一个数字返回。有没有办法强制JBuilder返回一个数字?以下示例中的相关参数为game_score。

控制器的相关部分:

  # GET /game
  # GET /game.json
  def index
    if params[:since]
      since_datetime = Time.parse(params[:since])
      @game = current_user.game.where(["updated_at >= ? and deleted is not true",  since_datetime])
    else
      @game = current_user.game.where('deleted is not true')
    end
  end

index.json.jbuilder文件:

json.array!(@game) do |game|
   json.extract! game, :id, :game_date, :game_score, :game_location, :game_team, :game_referee
   json.url game_url(game, format: :json)
end

MySQL数据类型为DECIMAL(10,2):时的JSON

[{"id":4814,"game_date":"2014-09-10T15:51:00.000Z","game_score":"1.55","game_location":null,"game_team":"Team 1","game_referee":null, "url":"http://[ip]/game/4814.json"}]

MySQL数据类型为DECIMAL(10,0):时的JSON

[{"id":4814,"game_date":"2014-09-10T15:51:00.000Z","game_score":1,"game_location":null,"game_team":"Team 1","game_referee":null, "url":"http://[ip]/game/4814.json"}]

最简单的方法是手动写入此字段,如:

json.game_score game.game_score.to_f

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