Rails控制器向Javascript发送JSON对象

Question

Rails控制器向Javascript发送JSON对象

4

我有一个哈希表，大概长这个样子：

Track_list = {:track1=>{:url=>"https://open.spotify.com/track/2Oehrcv4Kov0SuIgWyQY9e", :name=>"Demons"},
 :track2=>{:url=>"https://open.spotify.com/track/0z8yrlXSjnI29Rv30RssNI", :name=>"Shots - Broiler Remix"},
 :track3=>{:url=>"https://open.spotify.com/track/6Ep6BzIOB9tz3P4sWqiiAB", :name=>"Radioactive"},
 :track4=>{:url=>"https://open.spotify.com/track/3I05foFixB2sSZvV5Ppty8", :name=>"Blank Space/Stand By Me - Medley / Live From Spotify London"},
 :track5=>{:url=>"https://open.spotify.com/track/4G8gkOterJn0Ywt6uhqbhp", :name=>"Radioactive"}}

我正在尝试将该哈希转换为JSON格式，以便在我的JS文件中使用。以下是我在控制器中所做的：

@tl = track_list.as_json
# and it produces a result like this:
# {"track1"=>{"url"=>"https://open.spotify.com/track /2Oehrcv4Kov0SuIgWyQY9e", "name"=>"Demons"},
# "track2"=>{"url"=>"https://open.spotify.com/track/0z8yrlXSjnI29Rv30RssNI", "name"=>"Shots - Broiler Remix"},
# "track3"=>{"url"=>"https://open.spotify.com/track/6Ep6BzIOB9tz3P4sWqiiAB", "name"=>"Radioactive"},
# "track4"=>{"url"=>"https://open.spotify.com/track/3I05foFixB2sSZvV5Ppty8", "name"=>"Blank Space/Stand By Me - Medley / Live From Spotify London"},
# "track5"=>{"url"=>"https://open.spotify.com/track/4G8gkOterJn0Ywt6uhqbhp", "name"=>"Radioactive"}}

然而，当我打开我的 JS 文件并尝试输出文件时，我得到了如下结果：

console.log("<%= @tl %>");
"{&quot;track1&quot;:{&quot;url&quot;:&quot;https://open.spotify.com/track/2Oehrcv4Kov0SuIgWyQY9e&quot;,&quot;name&quot;:&quot;Demons&quot;},&quot;track2&quot;:{&quot;url&quot;:&quot;https://open.spotify.com/track/0z8yrlXSjnI29Rv30RssNI&quot;,&quot;name&quot;:&quot;Shots - Broiler Remix&quot;},&quot;track3&quot;:{&quot;url&quot;:&quot;https://open.spotify.com/track/6Ep6BzIOB9tz3P4sWqiiAB&quot;,&quot;name&quot;:&quot;Radioactive&quot;},&quot;track4&quot;:{&quot;url&quot;:&quot;https://open.spotify.com/track/3I05foFixB2sSZvV5Ppty8&quot;,&quot;name&quot;:&quot;Blank Space/Stand By Me - Medley / Live From Spotify London&quot;},&quot;track5&quot;:{&quot;url&quot;:&quot;https://open.spotify.com/track/4G8gkOterJn0Ywt6uhqbhp&quot;,&quot;name&quot;:&quot;Radioactive&quot;}}"

当我尝试执行以下操作时：

console.log(JSON.parse("<%= @tl %>");

它不能工作。我也尝试在@tl前面放置j，但是它给了我一个错误，说哈希不能与 gsub一起使用。

另外，当我尝试这样做时：

@track_list = JSON.generate(@tl) # from above

I get this:

"{\"track1\":{\"url\":\"https://open.spotify.com/track/2Oehrcv4Kov0SuIgWyQY9e\",\"name\":\"Demons\"},\"track2\":{\"url\":\"https://open.spotify.com/track/0z8yrlXSjnI29Rv30RssNI\",\"name\":\"Shots - Broiler Remix\"},\"track3\":{\"url\":\"https://open.spotify.com/track/6Ep6BzIOB9tz3P4sWqiiAB\",\"name\":\"Radioactive\"},\"track4\":{\"url\":\"https://open.spotify.com/track/3I05foFixB2sSZvV5Ppty8\",\"name\":\"Blank Space/Stand By Me - Medley / Live From Spotify London\"},\"track5\":{\"url\":\"https://open.spotify.com/track/4G8gkOterJn0Ywt6uhqbhp\",\"name\":\"Radioactive\"}}"

所以它实际上正确地转义了所有内容...我不知道为什么当我在我的JS文件中使用相同的变量时，它不会转义引号或其他任何内容。

谢谢！

- Karan

2个回答

0

试试这个：

var my_obj = <%= j @tl %>;
console.log(my_obj);

你只有一些小问题。你需要在视图中使用escape_javascript（或其别名j）。但是你还将json对象放在引号之间，这会导致浏览器将其视为字符串而不是json对象。

- Sean Huber

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可以查看英文原文，
原文链接

- K M Rakibul Islam · Accepted Answer

您可以通过以下方式将Rails控制器中的JSON对象发送到Javascript：

console.log("<%= @tl.to_json.html_safe %>");