动态创建Rails中4哈希键名 [英] Dynamically creating hash key name in Rails 4

问题描述

是否可以动态地创建一个哈希的键名？我通过以下哈希参数：

Is it possible to dynamically create key names of a hash? I'm passing the following hash parameters:

params[:store][:store_mon_open(5i)]
params[:store][:store_mon_closed(5i)]
params[:store][:store_tue_open(5i)]
params[:store][:store_tue_closed(5i)]
.
.
.
params[:store][:store_sun_open(5i)]
params[:store][:store_sun_closed(5i)]

要检查是否每一个参数是否存在我使用两个数组：

To check if each parameter exists, I'm using two arrays:

days_of_week = [:mon, :tue, ..., :sun]
open_or_closed = [:open, :closed]

不过，我似乎无法弄清楚如何动态地创建params哈希表（第二个键（与数组这里是我到目前为止有：

But, I can't seem to figure out how to dynamically create the params hash (the second key( with the array. Here's what I have so far:

days_of_week.each do |day_of_week|
  open_or_closed.each do |store_status|
    if !eval("params[:store][:store_#{day_of_week}_#{store_status}(5i)").nil
      [DO SOMETHING]
    end
  end
end

我已经尝试了一堆东西，包括eval方法（如上面列出的），但似乎轨不喜欢围绕5I括号。任何帮助是极大AP preciated！

I've tried a bunch of things including the eval method (as listed above) but rails seems to dislike the parentheses around the "5i". Any help is greatly appreciated!

推荐答案

您应该能够做到

if params[:store]["store_#{day_of_week}_#{store_status}(5i)".to_sym]

请注意，你是缺少？在 .nil？和！对象.nil？可缩短至仅仅对象

Note that you were missing the ? on .nil? and that !object.nil? can be shortened to just object

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