为什么我的Sinatra应用程序返回的JSON出现语法错误？
为什么我的Sinatra应用程序返回的JSON出现语法错误？
提问于 2013-04-01 20:30:34
我正在开发一个Sinatra应用程序，它返回JSON，例如
get '/clients' do
# do stuff
response = {
"success" => "true",
"msg" => "Clients successfully retrieved",
"data" => {"clients" => @current_user.clients}
}
return response.to_json
end返回的JSON如下所示：
{"success":"true","msg":"Clients successfully retrieved","data":{"clients":[{"client":{"created_at":"2013-03-31T22:50:18Z","email":"test@test.com","first_name":"Marge","gender":"F","hairdresser_id":2,"id":1,"surname":"Simpson","updated_at":"2013-03-31T22:50:18Z"}}]}}当我将其复制并粘贴到JSON解析器中时，它工作得很好。http://json.parser.online.fr/
但是当我启动irb并尝试使用它时，我得到了一堆错误：
1.9.3-p286 :001 > a = {"success":"true","msg":"Clients successfully retrieved","data":{"clients":[{"client":{"created_at":"2013-03-31T22:50:18Z","email":"test@test.com","first_name":"Marge","gender":"F","hairdresser_id":2,"id":1,"surname":"Simpson","updated_at":"2013-03-31T22:50:18Z"}}]}}
SyntaxError: (irb):1: syntax error, unexpected ':', expecting tASSOC
a = {"success":"true","msg":"Clients success...
^
(irb):1: syntax error, unexpected ',', expecting $end
a = {"success":"true","msg":"Clients successfully r...
^
from /home/[me]/.rvm/rubies/ruby-1.9.3-p286/bin/irb:13:in `<main>'
1.9.3-p286 :002 > 有谁能提供一些见解吗？我做错了什么吗？
非常感谢
回答 2
Stack Overflow用户
回答已采纳
发布于 2013-04-01 20:34:41
问题
JSON不构成有效的Ruby hash。这是一个需要用JSON#parse解析的字符串。
解决方案
通过使用单引号或Ruby引号将JSON解析为字符串。例如：
JSON.parse %q/{"success":"true","msg":"Clients successfully retrieved","data":{"clients":[{"client":{"created_at":"2013-03-31T22:50:18Z","email":"test@test.com","first_name":"Marge","gender":"F","hairdresser_id":2,"id":1,"surname":"Simpson","updated_at":"2013-03-31T22:50:18Z"}}]}}/
=> {"success"=>"true",
"msg"=>"Clients successfully retrieved",
"data"=>
{"clients"=>
[{"client"=>
{"created_at"=>"2013-03-31T22:50:18Z",
"email"=>"test@test.com",
"first_name"=>"Marge",
"gender"=>"F",
"hairdresser_id"=>2,
"id"=>1,
"surname"=>"Simpson",
"updated_at"=>"2013-03-31T22:50:18Z"}}]}}Stack Overflow用户
发布于 2013-04-01 20:38:15
您的散列具有表示为{ key : value }的键值对，但ruby使用'=>‘符号将键映射到值。
尝试将':‘替换为'=>’，效果很好。
eg) a = {"success" => "true"}如果你想把这个Json解析成ruby has，那就使用下面的代码片段：
require 'json'
value = "{\"val\":\"test\",\"val1\":\"test1\",\"val2\":\"test2\"}"
puts JSON.parse(value) # => {"val"=>"test","val1"=>"test1","val2"=>"test2"}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/15743513
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