Cannot read property 'cells' of undefined

[rakefs]

Hi Mike,

I have gone back and read your Hypermedia book (and two other newer ones). I am appreciative of your work. Thank you.

FYI, I have tried to run your code here and run into error. Not sure if it is node/npm/ejs version issue or something else...just letting you know. I realize this is old code but passing along the information anyways.

~/projects/Building-Hypermedia-APIs/nodejs/maze$ node app.js Express server listening on port 3000 scope` option is deprecated and will be removed in EJS 3
/home/rafs/projects/Building-Hypermedia-APIs/nodejs/maze/app.js:90
tot = Object.keys(doc.cells).length;
^

TypeError: Cannot read property 'cells' of undefined
at Vargs.callback (/home/rafs/projects/Building-Hypermedia-APIs/nodejs/maze/app.js:90:26)
at /home/rafs/projects/Building-Hypermedia-APIs/nodejs/maze/node_modules/cradle/lib/cradle/database/documents.js:45:18
at Request._onResponse [as _callback] (/home/rafs/projects/Building-Hypermedia-APIs/nodejs/maze/node_modules/cradle/lib/cradle.js:215:20)
at self.callback (/home/rafs/projects/Building-Hypermedia-APIs/nodejs/maze/node_modules/request/request.js:185:22)
at emitOne (events.js:115:13)
at Request.emit (events.js:210:7)
at Request.onRequestError (/home/rafs/projects/Building-Hypermedia-APIs/nodejs/maze/node_modules/request/request.js:877:8)
at emitOne (events.js:115:13)
at ClientRequest.emit (events.js:210:7)
at Socket.socketErrorListener (_http_client.js:401:9)
`

Regards,
Rafs