Question

为了提高我的Rails应用安全性，我想知道如何从参数哈希中获取所有键

哈希示例：

params = 
{"id"=>23, "name"=>"test", "infos"=>{"data"=>"er323e3ee23reQir", "signed"=>true}}

如果我params.keys

我获得了：["id", "name", "infos"]

但我希望以简单的数组获取所有密钥，例如：["id", "name", "infos", "data", "signed"]

有一种简单的方法可以做到这一点吗？

Answer 1

试试这个：

def deep_hash_keys(h)
 h.keys + h.map { |_, v| v.is_a?(Hash) ? deep_hash_keys(v) : nil }.flatten.compact
end

params = {"id"=>23, "name"=>"test", "infos"=>{"data"=>"er323e3ee23reQir", "signed"=>true}}

deep_hash_keys(params) # => ["id", "name", "infos", "data", "signed"]

Answer 2

我会使用一种新方法：

using UnityEngine;
using UnityEngine.UI;
using UnityEngine.Networking;

public class PlayerStats : NetworkBehaviour
{
 NetworkConfigurator netConf;

 [SyncVar]
 public float playerHealth;

 void Start () 
 {
     netConf = GameObject.Find ("NetworkManager").GetComponent<NetworkConfigurator> ();
     netConf.userStatus.SetActive (isLocalPlayer); // Here the problem
 }

 void Update () 
 {
     if (Input.GetKeyDown (KeyCode.LeftBracket))
     {
         if (playerHealth == 0)
             return;

         playerHealth -= 5;
     }
     if (Input.GetKeyDown (KeyCode.RightBracket))
     {
         if (playerHealth == 100)
             return;

         playerHealth += 5;
     }
     netConf.healthAmount.text = "" + playerHealth;
     netConf.healthBar.fillAmount = playerHealth / 100;
 }
}

优点：您还可以在非哈希函数中定义all_keys方法。

Answer 3

你可以修补哈希类：

class Hash
  def all_keys
   keys + map { |k, v| v.is_a?(Hash) ? v.all_keys : nil }.flatten.compact
  end
end

params = {"id"=>23, "name"=>"test", "infos"=>{"data"=>"er323e3ee23reQir", "signed"=>true}}

params.all_keys # => ["id", "name", "infos", "data", "signed"]

Rails - 从params hash获取所有密钥

3 个答案: