小编Pen*_*nny的帖子

我试图为我的搜索结果添加 csv，但它会抛出错误，告知未经允许的参数。我应该在 csv 链接中传递哪些参数？这样 csv 将只下载搜索结果。

报告控制器

def revenue_search
  @bookings = Booking.complete.order("created_at DESC")
  date = "1-#{params['date']['month']}-#{params['date']['year']}"
  date = Date.parse(date)
  @bookings = @bookings.where(created_at: date.beginning_of_month..date.end_of_month)
  @per_page = params[:per_page] || Booking.per_page || 20
  @bookings = @bookings.paginate( :per_page => @per_page, :page => params[:page])
  if params[:currency].present?
    @bookings = @bookings.where(currency: params[:currency])
  end
  respond_to do |format|
    format.html
    format.csv { send_data @bookings.revenue_csv }
  end
end

模型

def self.revenue_csv
  attributes = %w{ total value deposit balance }
  CSV.generate(headers: true) do |csv|
   csv << attributes
   all.each do |booking|
    csv << …

我有一个布尔值的矩阵:

require 'matrix'
m1 = Matrix[[0,1,1,1],[0,0,1,1],[1,1,1,1],[0,0,0,0]]

我想找到最大数量为1s 的行.谁能帮我？