Ruby - 解析来自 URL 的 JSON [英] Ruby - parsing JSON coming via URL

问题描述

我正在使用 javascript 向 ruby​​ 发送一个 JSON 对象.但我无法在那里解析它.我尝试了以下内容，但没有运气.此外，我已经搜索了一段时间，但找不到任何有用的东西.

I'm sending a JSON object to ruby with javascript. But I cannot parse it in there. I tried following stuff but no luck. Also I've been searching around for while now, but I couldn't find anything helpful.

请注意，我是全新的 ruby​​.

Note that I'm very new ruby.

我的试验:

def initialize(game_conf_json)        
    parsed_conf = JSON.parse(conf_json)
    @param1 = parsed_conf['name'][0]
    @param2 = parsed_conf['surname'][0]

    =begin
    I also tried this:
    @param1 = parsed_conf['name']
    @param2 = parsed_conf['surname']

    But no matter what other things I try, I'm getting the following error:
    "21:in `[]': can't convert String into Integer (TypeError)"

    OR

    "can't convert Array into String (TypeError), "

    =end


    File.open("some_direc/conf.json", "w") do |f|
        f.write(game_conf_json)
    end

end

我像这样在 javascript 中创建 json:

I create the json in javascript like this:

var json_of_form_vars = {};
json_of_form_vars.name = name_val;
json_of_form_vars.surname = surname_val;

并以这种方式发送:

$.ajax({
    url: "../fundament/dispatch.rb/",
    type: "post",
    dataType: "json",
    data: "conf="+json_of_form_vars,
    .....

我该如何解决这个问题?是否有针对此问题的适当教程?

How can I solve this problem? Is there any proper tutorial for this of problem?

UPDATE1(经过建议):我使用 JSON.stringify 然后将对象传递给 ruby​​.然后我终于能够用 ruby​​ 打印对象.如下所示:

UPDATE1 (After suggestions): I used JSON.stringify and then passed the object to ruby. And then I finally able to print the object in ruby. It's listed below:

{"name": "METIN", "surname": "EMENULLAHI"}

方法 .class 声称它是一个数组.但我无法使用经典方式访问数据，例如:

The method .class claims that it is an array. But I cannot access data with classical ways, like:

array['name']

错误是:

无法将字符串转换为整数

can't convert String into Integer

当我尝试将它传递给 ruby​​ 中的 JSON.parse 时，它给了我以下错误:

And when I try to pass it to the JSON.parse in ruby, it gives me the following error:

无法将数组转换为字符串

can't convert Array into String

所以我使用了 JSON.parse(conf_array.to_json)，但是在访问数据时它再次给出了与数组相同的错误:

So I used JSON.parse(conf_array.to_json), but again when accessing the data it gives the same error like arrays:

无法将字符串转换为整数

can't convert String into Integer

现在应该做什么?

更新2这是我的 cgi 处理程序，它将 URL 参数传递到适当的位置:

UPDATE2 Here is my cgi handler which passes the URL parameters to appropriate places:

cgi_req = CGI::new
puts cgi_req.header

params_from_request = cgi_req.params

logger.error "#{params_from_request}"

action_todo = params_from_request['action'][0].chomp

base = Base.new

if action_todo.eql?('create')
    conf_json = params_from_request['conf']
    # This line prints the json like this: {"name": "SOME_NAME", "surname": "SOME_SURNAME"}
    logger.error "#{conf_json}"
    base.create_ident(conf_json) 
end

在基类中:

def create_ident(conf_json)
   require 'src/IdentityCreation'
   iden_create = IdentityCreation.new(conf_json)
end

IdentityCreation 的构造函数在上面列出.

IdentityCreation's constructor is listed above.

更新 3:

好的，我现在至少从数组中得到了一些东西.但是当我访问一个密钥时，它会显示密钥本身:

Ok, I now get at least something out of the array. But when I access a key, it displays the key itself:

parsed_conf = JSON.parse(conf_json.to_json)
@param1 = parsed_conf[0]['name']
@param2 = parsed_conf[0]['surname']

# At this point when I print the @param1, it gives me "name"(the key), not "SOME_NAME"(the value).

推荐答案

我终于解决了.使用在这篇文章下提出的所有建议，以及我在哈希、数组、json 等方面的 irb 经验.

I solved it finally. Using all the suggestions made under this post and also my irb experiences with hashes, arrays, json and etc.

因此，我没有将对象 (conf_json) 转换为 json(使用 to_json)，而是将其作为字符串传递给 JSON.parse如下图:

So instead of converting my object (conf_json) to json (with to_json), I passed it to JSON.parse as a string like below:

parsed_conf = JSON.parse(%{#{conf_json}})

这对我来说似乎有点奇怪，因为当尝试将它传递给如下所示的函数时，我收到了无法将数组转换为字符串的错误.

It seems kind of weird to me, because when try to pass it to function like below, I got the error of can't convert Array into String.

parsed_conf = JSON.parse(conf_json)

但它现在就像一个魅力.

But it is working like a charm right now.

这篇关于Ruby - 解析来自 URL 的 JSON的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！