Plugins usage mongoose.model(name) not working

[zinzinday]

I'm submitting a...

[ ] Regression 
[x] Bug report
[x] Feature request
[ ] Documentation issue or request
[ ] Support request => Please do not submit support request here, instead post your question on Stack Overflow.

@see Example

import * as existsValidator from 'mongoose-exists';
import * as uniqueValidator from 'mongoose-beautiful-unique-validation';
@Injectable()
export class MongoService implements MongooseOptionsFactory {
  createMongooseOptions(): MongooseModuleOptions {
    mongoose.plugin(existsValidator);
    mongoose.plugin(uniqueValidator);
    mongoose.set('debug', true);
    return {
      uri: 'mongodb://localhost:27017/testdb',
      useNewUrlParser: true,
      useCreateIndex: true,
    };
  }
}

App Module:

    MongooseModule.forRootAsync({
      useClass: MongoService,
    })

Schema

export const FavoritSchema = new Schema({
  name: {
    type: String,
    required: true,
  },
  user: {
    type: Schema.Types.ObjectId,
    ref: 'user',
    validate: {
      isAsync: true,
      validator: (v, cb) => {
        /*setTimeout(function() {
          cb(true);
        }, 500);*/ // working

        // mongoose.model('user').findById(v).exec().then(user => cb(!!user)).catch(() => cb(false));
        // not working
      },
      message: 'do not exists!',
    },
    required: true,
  },
}, {
  toJSON: {
    versionKey: false,
    virtuals: true,
    transform: (doc, ret) => {
      delete ret._id;
    },
  },
});

Schema usage plugin mongoose-exists

export const FavoritSchema = new Schema({
  name: {
    type: String,
    required: true,
  },
  user: {
    type: Schema.Types.ObjectId,
    ref: 'user',
    exists: true // not working
}, {
  toJSON: {
    versionKey: false,
    virtuals: true,
    transform: (doc, ret) => {
      delete ret._id;
    },
  },
});

Environment

[System Information]
OS Version     : Linux 4.15
NodeJS Version : v8.14.0
NPM Version    : 6.4.1
[Nest Information]
mongoose version : 5.2.2
common version   : 5.4.0
core version     : 5.4.0
"mongoose": "^5.4.2",
"mongoose-exists": "^0.6.4",

 
For Tooling issues:
- Node version: XX  
- Platform:  

Others:

[zinzinday]

that will working if we use method connect instead of createConnection at

mongoose/lib/mongoose-core.module.ts

Line 54 in 22d0955

mongoose.createConnection(uri, mongooseOptions as any),

[kamilmysliwiec]

In this case, are you sure that this issue comes from the @nestjs/mongoose library? I'd say that this behavior should be described in the mongoose repository. Or plugins aren't applied to connections created through createConnection by default?

[NenadJovicic]

Actually, having same problem, and find out that it comes from nestjs somehow
#109

You can check my latest answer here.
So, is there any proper way to provide a proper connection to some plugin?
I am using this plugin
And it also requires mongoose.connection, which is undefined
But 2nd connection in mongoose.connections is valid one

[NenadJovicic]

@kamilmysliwiec looks like this is a 'problem' made by mongoose. because when you import mongoose in some file, it will automatically call constructor of mongoose, where it has createConnection() call without any params, and it will be pushed to list of connections