Question

我一直在跟随thinkster的在线教程“构建你的第一个平均堆栈应用程序”

https://thinkster.io/mean-stack-tutorial#beginning-node

我试图通过使用

测试我的路线以确定其是否正确

    <h1>Cast to ObjectId failed for value &#34;57bcdb57bcdb255600e6d114e7afb9&#34; at path &#34;_id&#34;</h1>

并且mongod抛出505错误说

    curl http://localhost:8080/<POST ID>/posts

CastError: Cast to ObjectId failed for value "57bcdb57bcdb255600e6d114e7afb9" at path "_id"
    at MongooseError.CastError (/home/ubuntu/workspace/flapper-news/node_modules/mongoose/lib/error/cast.js:19:11)
    at ObjectId.cast (/home/ubuntu/workspace/flapper-news/node_modules/mongoose/lib/schema/objectid.js:147:13)
    at ObjectId.castForQuery (/home/ubuntu/workspace/flapper-news/node_modules/mongoose/lib/schema/objectid.js:187:15)
    at cast (/home/ubuntu/workspace/flapper-news/node_modules/mongoose/lib/cast.js:208:32)
    at Query.cast (/home/ubuntu/workspace/flapper-news/node_modules/mongoose/lib/query.js:2653:10)
    at Query.findOne (/home/ubuntu/workspace/flapper-news/node_modules/mongoose/lib/query.js:1284:10)
    at /home/ubuntu/workspace/flapper-news/node_modules/mongoose/lib/query.js:2230:21
    at new Promise.ES6 (/home/ubuntu/workspace/flapper-news/node_modules/mongoose/lib/promise.js:45:3)
    at Query.exec (/home/ubuntu/workspace/flapper-news/node_modules/mongoose/lib/query.js:2223:10)
    at /home/ubuntu/workspace/flapper-news/routes/index.js:37:9
    at paramCallback (/home/ubuntu/workspace/flapper-news/node_modules/express/lib/router/index.js:404:7)
    at param (/home/ubuntu/workspace/flapper-news/node_modules/express/lib/router/index.js:384:5)
    at Function.process_params (/home/ubuntu/workspace/flapper-news/node_modules/express/lib/router/index.js:410:3)
    at next (/home/ubuntu/workspace/flapper-news/node_modules/express/lib/router/index.js:271:10)
    at Function.handle (/home/ubuntu/workspace/flapper-news/node_modules/express/lib/router/index.js:176:3)
    at router (/home/ubuntu/workspace/flapper-news/node_modules/express/lib/router/index.js:46:12)

我通过输入

检查了id和对象是否存在

ssml

它验证了一个物体确实在那里

如果您想仔细查看cloud9Workspace

，请访问我的cloud9工作空间

我不知道出了什么问题，它可能与我的mongodb版本有关吗？（它比教程中的后一个）

提前感谢您的时间，希望您能提供帮助！

Answer 1

看起来你作为ObjectID传递的字符串格式不正确（它太长了）。 Mongo ObjectID是24个字符（12个字节）的字符串。您的特定ID有30个字符

Mongod测试路线时遇到问题

1 个答案: