Unable to Append Array Within MongoDB (mongoose) Document - node.js

Question

I'm trying to append an empty array in a mongo database with a String that is created in the front-end (website ui), the relevant code snipets are as following:
mongoose Schema
email: String,
displayName: String,
googleId: String,
toIgnore: [{toIgnoreURL: String}]
})
document creation with passport & passport-google-oauth20
User.findOne({email: email.emails[0].value}).then((currentUser)=>{
if(currentUser){
// user does already exist
console.log('welcome back!', currentUser)
done(null, currentUser)
}
else{ // user doesn't exist yet
new User({
email: email.emails[0].value,
displayName: email.displayName,
googleId: email.id,
toIgnore: []
}).save().then((newUser)=>{
console.log('new user created: ' + newUser)
done(null, newUser)
});
}
})
And lastly the attempt to append the toIgnore array property of the 'User' collection (of the currently logged in user)
User.update(
{email: emailThisSession},
{$push: {toIgnore: {toIgnoreURL: url}}})
In mongodb I see that the following document is successfully created
_id
:ObjectId(
IdOfDocumentInMongoDB)
toIgnore
:
Array
email
:
"myactualtestemail"
googleId
:
"longgoogleidonlynumbers"
__v
:
0
(Also as seen in attached image)
document in mongodb ui
I don't seem to figure out how to actually populate the 'toIgnore' array.
For instance, when console logging the following
var ignoreList = User.findOne({email:emailThisSession}).toIgnore;
console.log(ignoreList)
The output is undefined
Note that console logging the url variable does indeed print the value I want to append to the array!
I tried any format combination I could think of in the Schema builder and document creation, but I can't find figure the right way to get it done!
Any help would be appreciated!
Update, using promises didn't work either
User.findOne({email:emailThisSession}).then((currentUser)=>{ //adding .exec() after findOne({query}) does not help as in User.findOne({email:emailThisSession}).exec().then(...)
console.log(currentUser.toIgnore, url) //output is empty array and proper value for url variable, empty array meaning []
currentUser.toIgnore.push(url)
});
While adjusting the Schema as follows:
const userSchema = new Schema({
email: String,
displayName: String,
googleId: String,
toIgnore: []
})
Solution
I simply needed to change the update command to
User.updateOne(
{email: emailThisSession},
{$push: {toIgnore: {toIgnoreURL: url}}}).then((user)=>{
console.log(user)
})
Thanks #yaya!

Answer 1

Unable to add array element within a document with mongoose
define your schema as:
const UserSchema = new mongoose.Schema({
...
toIgnore: [{toIgnoreURL: String}]
})
then you can create an object like this :
new User({
...,
toIgnore: [] // <-- optional, you can remove it
})
To check the value:
User.findOne({...}).then(user => {
console.log(user.toIgnore)
});
Your update statement should be:
User.update(
{email: emailThisSession},
{$push: {toIgnore: {toIgnoreURL: url}}}
).then(user => {
console.log(user)
})
So in your case, this is undefined:
User.findOne({email:emailThisSession}).toIgnore
Since findOne is async. for getting the result, you can whether pass it a callback or you can use promises (User.findOne({...}).then(user => console.log(user.toIgnore)))
Update:
While adjusting the Schema as follows: new Schema({..., toIgnore: []})
Here is the problem with your update. you should change it back to : toIgnore: [{toIgnoreURL: String}]