for example the following schemes are the following folders
cr/user
lms/content
this is the outline contained
user: {
type: Schema.Types.ObjectId,
ref: 'cr/user'
}
How can I reference a user from the schema content?
because if I use it like this I get an error "Schema has not been registered for model"
You are defining the reference incorrectly; this is not the model's route is the name that you give when exporting it using mongoose.model .
Example
If you have exported the user model as follows:
module.exports = mongoose.model('User', schema);
Then, the reference must be User :
user: {
type: Schema.Types.ObjectId,
ref: 'User',
}