将 JSON 对象从 rails 控制器发送到 Javascript

Question

所以我构建了一个散列，看起来像这样：

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"}}

我正在尝试将该散列转换为 JSON，以便我可以在我的 JS 文件中使用它，这就是我在我的控制器中所做的：

@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"}}

但是，当我转到我的 JS 文件并尝试打印文件时，我得到的是：

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;}}"

当我尝试这样做时：

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

没用。我还尝试将 j 放在 @tl 前面，但它给了我一个错误，指出哈希不能与 gsub 一起使用。

此外，当我尝试这样做时：

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

我明白了：

"{\"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，它没有转义引号或任何东西。

谢谢！

Answer 1

试试这个：

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

您只是遇到了一些小问题。您确实需要在视图中使用 escape_javascript（或其别名 j）。但是您也在引号之间粘贴 json 对象，这将导致浏览器将其视为字符串而不是 json 对象。

Answer 2

您可以通过这样做将 JSON 对象从 Rails 控制器发送到 Javascript：

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

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