访问 Rails 中的嵌套参数 - 来自复选框的属性

Question

我正在尝试访问从复选框中获取的用户数组，以添加到预订和用户模型之间的 HABTM 关联。

参数散列如下：

Parameters: {"utf8"=>"✓", "authenticity_token"=>"vx0dTg8Q2XpyFcXpmmiwbwtFwNiRO25CQImGBasArDZjEbOmjh2lkBSdQGl8Z2Sgr7+kF2qveergEFjZr63AHQ==", "reservation"=>{"name"=>"daads", "phone"=>"", "email"=>"", "number_people"=>"1", "duration"=>"1", "address"=>"", "description"=>"", "users"=>["", "3", "2"]}, "commit"=>"Create Reservation", "date"=>"2016-10-30", "hour"=>"01:30", "id"=>"1"}

我的方法代码是：

def add_reservation
  @business = Business.find(params[:id])
  @reservation = Reservation.new(reservation_params)
  init_date = params[:date].to_s + " " + params[:hour].to_s + ":00"

  @reservation.date = init_date.to_datetime
  @reservation.date_end = (@reservation.date.to_time + @reservation.duration.hours).to_datetime


  user_reservation_params[:users].each do |u|
    @reservation.users << u
  end

  @business.reservations << @reservation

  flash[:success] = "Reservation added!"
  redirect_to business_path(@business)
end

我的助手定义为：

private
def reservation_params
  params.require(:reservation).permit(:name, :email, :address, :phone, :duration, :date, :date_end, :number_people, :description)
end

private
def user_reservation_params
  params.require(:reservation).permit(:users => [])
end

我目前访问 params 哈希的用户部分的方式给我空变量...我应该如何访问这些值？

Answer 1

您可以像 params[:reservation][:users] 一样访问它们，不需要为此使用强参数，因为它们不用于批量分配。

访问 Rails 中的嵌套参数 - 来自复选框的属性

Access nested params in Rails - attributes from checkbox

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