Method Map.prototype.has called on incompatible receiver

[Hyperblaster]

Just Updated mongoose from 5.0.16 to 5.1.7 and now encounter this error.
Rolling back to 5.0.16, everything works fine. Is mongoose-schema-extend not valid with the later versions of mongoose?

TypeError: Method Map.prototype.has called on incompatible receiver [object Map]
    at Clone.has (<anonymous>)
    at get (/node_modules/kareem/index.js:418:11)
    at Clone.Kareem.pre (/node_modules/kareem/index.js:350:16)
    at Clone.Schema.pre (/node_modules/mongoose/lib/schema.js:1135:20)
    at Schema.extend (/node_modules/mongoose-schema-extend/index.js:92:15)

[techitesh]

Facing Same issue on mongoose version "^5.1.7" any solution???

[kennylmay]

I also face the same problem. I have narrowed it down to 5.1.4 of mongoose works to 5.1.5 doesn't.

[techitesh]

I created By Own Plugin and Resolved the Issue

[bdsomer]

@techitesh Could you please explain your solution?

[kennylmay]

@bdsomer I forked it and fixed this problem I believe. Give it a try and see if it works for you https://github.com/kennylmay/mongoose-schema-extend

[bdsomer]

@kennylmay I would make a PR to this repo! I know the developers aren't active but just in case they come back.

[dsc8x]

@Hyperblaster note that you actually don't really need this lib anymore, as this is now built into mongoose: https://mongoosejs.com/docs/api.html#model_Model.discriminator

[Hyperblaster]

@epegzz Know of an upgrade tutorial at all out there?