Cannot use 'in' operator to search for '_id' in

coffeescript, express, javascript, mongoose, node.js

Solution

This error is not specific to Mongoose; it would show if `obj` is not an object, but a string for instance:

var obj = 'Account';
'id' in obj;
// TypeError: Cannot use 'in' operator to search for 'id' in Account

Assuming that it's not a Mongoose issue, you'd be looking somewhere here:

at Object.findOrCreateOneForTwitter 
    (/webroot/api.domain.com/production/models/account.coffee:60:17)

Problem

I'm trying to get an existing user document using mongoose with express but I only get this: ``` /webroot/api.domain.com/production/node_modules/mongoose/lib/document.js:162 if (obj && '_id' in obj) continue; ^ TypeError: Cannot use 'in' operator to search for '_id' in Account at model.Document._buildDoc (/webroot/api.domain.com/production/node_modules/mongoose/lib/document.js:162:27) at model.Document (/webroot/api.domain.com/production/node_modules/mongoose/lib/document.js:67:20) at model.Model (/webroot/api.domain.com/production/node_modules/mongoose/lib/model.js:33:12) at new model (/webroot/api.domain.com/production/node_modules/mongoose/lib/model.js:1663:11) at Object.model (/webroot/api.domain.com/production/node_modules/mongoose/lib/model.js:1662:14) at Object.findOrCreateOneForTwitter (/webroot/api.domain.com/production/models/account.coffee:60:17) at module.exports.callback.error (/webroot/api.domain.com/production/endpoints/twitter.coffee:67:34) at Twitter.get (/webroot/api.domain.com/production/node_modules/ntwitter/lib/twitter.js:85:7) at passBackControl (/webroot/api.domain.com/production/node_modules/oauth/lib/oauth.js:361:11) at IncomingMessage.exports.OAuth._performSecureRequest.request.on.callbackCalled (/webroot/api.domain.com/production/node_modules/oauth/lib/oauth.js:380:9) ``` Is there any known fix for that? Thanks.

Original source