Mongoose 4: Cannot read property 'apply' of undefined

[SimoneTaliercio]

Hi All :)

I'm fighting with the following error when creating a document with the new operator:

TypeError: Cannot read property 'apply' of undefined
      at q.reduce.post (/Users/simone/Enviroments/nodejs/target-manager-server/node_modules/mongoose/lib/document.js:1672:20)
      at Array.reduce (native)
      at model.Document.$__registerHooksFromSchema (/Users/simone/Enviroments/nodejs/target-manager-server/node_modules/mongoose/lib/document.js:1670:18)
      at model.Document (/Users/simone/Enviroments/nodejs/target-manager-server/node_modules/mongoose/lib/document.js:76:8)
      at model.Model (/Users/simone/Enviroments/nodejs/target-manager-server/node_modules/mongoose/lib/model.js:45:12)
      at new model (/Users/simone/Enviroments/nodejs/target-manager-server/node_modules/mongoose/lib/model.js:2932:11)
      at /Users/simone/Enviroments/nodejs/target-manager-server/node_modules/mongoose/lib/model.js:1744:22
      at /Users/simone/Enviroments/nodejs/target-manager-server/node_modules/mongoose/node_modules/async/lib/async.js:570:21
      at /Users/simone/Enviroments/nodejs/target-manager-server/node_modules/mongoose/node_modules/async/lib/async.js:249:17
      at /Users/simone/Enviroments/nodejs/target-manager-server/node_modules/mongoose/node_modules/async/lib/async.js:125:13
      at Array.forEach (native)

Since our application is using mongoose-schema-extend I was wondering if you have any tips.

Might it be that mongoose-schema-extend is not compatible with moongoose v.4 ?

Thanks a lot for your help!
Simone

[SimoneTaliercio]

I have an updated on this. It seems that moongose-extend-schema is working properly till a 3rd level of extension, but at the 4th it breaks. E.g. A <- B <- C is ok, but A <- B <- C <- D is not working.

[sieira]

I'm marking this as a bug. Unfortunately, I don't have the time to handle this at this moment, sorry

[SimoneTaliercio]

Thanks for your reply, sieira. If we can help in anyway then don't hesitate to ask.
I tried to deep dive into both modules (mongoose and yours) but I cannot understand why it breaks. Maybe it is the line where the deep-copy occurs, or maybe is the middleware/hooks from mongoose is changed...
If we would have the expertise to fix it then we would submit a pull request :)