Question

我正在使用RestClient在Ruby中编写一些测试。测试工作正常，响应是JSON，但是当我解析JSON并尝试提取我正在寻找的值时，我收到错误IndexError: key not found

IMO，我的代码应该可行。 JSON是：

{"user":{"@xmlns":{"dvi":"http:\/\/xxxx","a":"http:\/\/xxxx","$":"http:\/\/xxxx"},"link":[{"@rel":"self","$":"http:\/\/xxxx"},{"@rel":"user","$":"http:\/\/xxxx"},{"@rel":"usage","$":"xxxx"},{"@rel":"repositories","$":"http:\/\/xxxx"},{"@rel":"shares","$":"http:\/\/xxxx"},{"@rel":"shareMemberships","$":"http:\/\/xxxx"}],"phone":{"$":"3518012343001"},"email":{"$":""},"firstName":{"$":"Jim"},"lastName":{"$":"Joe"},"uid":{"$":"91bc7a72bc724e5e9b53e688dd105ed4"},"accountName":{"$":"3518012343001"},"notificationMethod":{"$":"email sms"},"accountStatus":{"$":"Active"},"serviceLevel":{"$":"5"},"repositoryCount":{"$":"1"},"usage":{"allowed":{"$":"5368709120"},"total":{"$":"1024"}},"contactEmail":{"$":"jim@joe.com"}}}

我的代码是：

result = jsonabove
jdoc = JSON.parse(result)
notificationMethod = jdoc.fetch("notificationMethod")

return notificationMethod

Answer 1

这种情况正在发生，因为notificationMethod键不是哈希中的第一级键。准备好JSON#parse方法后，您只有一个名为user的密钥。您应该通过此密钥获取值，然后应用notificationMethod密钥。它看起来像这样：

require 'json'

result = <<HERE
{"user":{"......"}}
HERE

jdoc = JSON.parse(result)
notificationMethod = jdoc.fetch("user").fetch("notificationMethod")
puts notificationMethod

如何从JSON响应中提取值？

1 个答案: