如何使用Nodejs删除Mongo中JSON格式数据的斜杠？

Question

我使用Nodejs和mongoskin将数据作为JSON格式存储在mongo表中.Mongo自动在json格式的数据中添加斜杠.然后当我检索时,我无法解析数据.请建议我,如何删除斜杠或如何解析数据？

 db.messagetable.find().forEach(printjson)
{
        "_id" : "1861574",
        "MatriId" : "1861574",
        "session" : "{\"messages\":{\"cometchat\":{\"timedifference\":0,\"cometchat_buddytime\":0,\"msgavails\":\"\"}}}",
        "expires" : 1341702134
}

Answer 1

slahses用于转义"JSON编码字符串中的charatcer (不是json对象,因为

> JSON.parse("{messages:1}")
SyntaxError: Unexpected token m
    at Object.parse (native)
    at repl:1:7
    at REPLServer.eval (repl.js:80:21)
    at Interface.<anonymous> (repl.js:182:12)
    at Interface.emit (events.js:67:17)
    at Interface._onLine (readline.js:162:10)
    at Interface._line (readline.js:426:8)
    at Interface._ttyWrite (readline.js:603:14)
    at ReadStream.<anonymous> (readline.js:82:12)
    at ReadStream.emit (events.js:88:20)

所以键必须用括号"来表示一个字符串,但你不能只是放在"字符串里面.修复json解析器附加的问题\

 > JSON.parse("{\"messages\":1}")
{ messages: 1 }

因此,当您解析时,只需调用JSON.Parse会话字符串

> JSON.parse("{\"messages\":{\"cometchat\":{\"timedifference\":0,\"cometchat_buddytime\":0,\"msgavails\":\"\"}}}")
{ messages: 
   { cometchat: 
      { timedifference: 0,
        cometchat_buddytime: 0,
        msgavails: '' } } }