Loopback + mongoDB: Can't find extended user - node.js

Question

I am using Loopback 3.0 with MongoDB connector.
In a REST method exposed somewhere, I need to access the currently logged user and make some updates on it.
I have extended the base User model, calling it appUser, the login works, and I can get the token (after I changed the token model to point to the appUser) of a logged user. The model is the following one:
{
"name": "appUser",
"plural": "appUsers",
"base": "User",
"idInjection": true,
"options": {
"validateUpsert": true
},
"properties": {
"gender": {
"type": "string",
"enum": [
"M",
"F"
]
},
"birthDate": {
"type": "Date"
}
},
"validations": [],
"relations": {},
"acls": []
}
I need to access the user profile, in order to update it. But when I query it, I get null as result.
const User = app.models.appUser;
User.findOne({
where: {
_id: ObjectId("5aae7ecd2ed1b11b1c09cf25")
}
}, (err, user) => {
if (err || res == null) {
console.log("Error updating the user ");
const error = {
"name": "Database error",
"status": 500,
"message": "Can't access the database."
}
callback(error, null, null);
} else {
//Whatever
}
});
But if I run the same query from Robo3T on MongoDB, it works.
db.getCollection('appUser').find({"_id": ObjectId("5aae7ecd2ed1b11b1c09cf25")})
What am I doing wrong?
Thank you,
Massimo

Answer 1

You didn't call the user so that should be the case, also in your callback you are passing null and not your user result. However I don't get where the res variable came from.
const User = app.models.appUser;
User.findOne({
where: {
_id: ObjectId("5aae7ecd2ed1b11b1c09cf25"),
}
}, (err, user) => {
if (err) {
console.log("Error updating the user", err); // logs the app error
const error = {
"name": "Database error",
"status": 500,
"message": "Can't access the database."
}
callback(error, null); // passes your custom error
}
console.log("APP USER", user);
callback(null, user);
});
I don't how you calling your callback but i think you can manage this.
If you still have no result try changing _id to id