How to push to an array in mongoose - arrays

Question

I have this code:
router.post('/setsuggestions', function(req, res, next){
if(!req.body.username || !req.body.challengessuggestions){
return res.status(400).json({message: challengessuggestions});
}
var query = { username: req.body.username };
/*User.findOneAndUpdate(query, { challengessuggestions: req.body.challengessuggestions }, callback = function(response){
res.json(response);
});*/
/*
User.findOneAndUpdate(
query,
{$push: {"challengessuggestions": {$oid: req.body.challengessuggestions}}},
callback = function(response) {
res.json(response);
}
);*/
User.findOneAndUpdate(
query,
{$push: {challengessuggestions: req.body.challengessuggestions}},
{safe: true, upsert: true},
function(err, model) {
res.json(err);
}
);
});
When I postman like this:
I get the following error:
{ "name": "MongoError", "message": "exception: The field
'challengessuggestions' must be an array but is of type OID in
document {_id: ObjectId('56263b910d1a2f1f0077ffae')}", "errmsg":
"exception: The field 'challengessuggestions' must be an array but is
of type OID in document {_id: ObjectId('56263b910d1a2f1f0077ffae')}",
"code": 16837, "ok": 0 }
This is the schema definition of AppUser:
var UserSchema = new mongoose.Schema({
username: { type: String, lowercase: true, unique: true },
firstname: { type: String},
lastname: { type: String},
difficulty: { type: String},
isstudent: { type: Boolean },
haschildren: { type: Boolean},
gender: { type: String },
email: { type: String, unique: true},
birthdate: String,
isdoingchallenges: { type: Boolean },
challengescompleted: [{ type: ObjectId, ref: 'Challenge' }],
currentchallenge: { type: ObjectId, ref: 'Challenge' },
challengessuggestions: [{ type: ObjectId, ref: 'Challenge' }],
hash: String,
salt: String
});
This is the schema definiton of challenge:
var Challengeschema = new mongoose.Schema({
name: { type: String, initial: true, required: true, index: true },
image: { type: Array },
difficulty: { type: String },
studentfriendly: { type: Boolean },
childfriendly: { type: Boolean },
description: { type: String }
});
I'm sending this in the function that calls the api:
Object {_id: "5631423f8c5ba50300f2b4f6", difficulty: "medium", name:
"Probeer 1 van onze recepten.", __v: 0, childfriendly: true…}
This gives me following error:
D:\Stijn\Documenten\EVA-project-Groep-6\Api\node_modules\mongoose\lib\schema\obj
ectid.js:134
throw new CastError('ObjectId', value, this.path);
^ Error
at MongooseError.CastError (D:\Stijn\Documenten\EVA-project-Groep-6\Api\node
_modules\mongoose\lib\error\cast.js:18:16)
at ObjectId.cast (D:\Stijn\Documenten\EVA-project-Groep-6\Api\node_modules\m
ongoose\lib\schema\objectid.js:134:13)
at Array.MongooseArray.mixin._cast (D:\Stijn\Documenten\EVA-project-Groep-6\
Api\node_modules\mongoose\lib\types\array.js:124:32)
at Array.MongooseArray.mixin._mapCast (D:\Stijn\Documenten\EVA-project-Groep
-6\Api\node_modules\mongoose\lib\types\array.js:295:17)
at Object.map (native)
at Array.MongooseArray.mixin.push (D:\Stijn\Documenten\EVA-project-Groep-6\A
pi\node_modules\mongoose\lib\types\array.js:308:25)
at Query. (D:\Stijn\Documenten\EVA-project-Groep-6\Api\routes\ind ex.js:144:44)
at D:\Stijn\Documenten\EVA-project-Groep-6\Api\node_modules\mongoose\node_mo
dules\kareem\index.js:177:19
at D:\Stijn\Documenten\EVA-project-Groep-6\Api\node_modules\mongoose\node_mo
dules\kareem\index.js:109:16
at doNTCallback0 (node.js:408:9)
at process._tickCallback (node.js:337:13) 29 Oct 22:05:38 - [nodemon] app crashed - waiting for file changes before starti ng...
How do I solve this?

Answer 1

Query the User user using findOne() first and use the first found document that's passed to the callback to save the embedded documents with:
router.post('/setsuggestions', function(req, res, next){
if(!req.body.username || !req.body.challengessuggestions){
return res.status(400).json({message: challengessuggestions});
}
var query = { username: req.body.username };
User.findOne(query, function (err, user){
if (err) //throw ...
if (user) {
if (user.challengessuggestions && user.challengessuggestions.length) {
user.challengessuggestions.push(req.body.challengessuggestions);
}
else {
user.challengessuggestions = [req.body.challengessuggestions];
}
// save changes
user.save(function (err) {
if (!err) {
// done ...
}
});
}
});
);