OverwriteModelError: Cannot overwrite `xxx` model once compiled.

Hi Guys. I have a problem. I understand what is going on, but I don’t know how it fixed. I’m using mongoose as common ORM instead sequelize. It work not bad. But when HMR started, I have seen error in my console. (node:29695) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 3): OverwriteModelError: Cannot overwrite Clientmodel once compiled. Mongoose doesn’t allow to define the model twice. When HMR tries to update server, it defines model twice. Can you save me?😃

[tgdn]

The way I did it is removing the model from mongoose’s models with

delete mongoose.connection.models['client'];

const clientSchema = mongoose.Schema({
  ...
});

export default mongoose.model('client', clientSchema);

Then you can register the model again through HMR or anything else.

[kppf]

@dpblh I fixed it like this:

export default (mongoose.models && mongoose.models.User
  ? mongoose.models.User
  : mongoose.model('User', userSchema));