How to push a value to an array using NodeJS and Mongoose

Question

I'm trying to update an array that is available on my MongoDB. I tried the way below but I reive the message "Cannot read property push of undefined"

router.get("/candidatarse/:id", eCandidato, (req,res)=>{
Vaga.findOne({_id: req.params.id}).then((vaga)=>{
    
    vaga.candidatos.push(req.user._id)

    vaga.save().then(()=>{
    req.flash("success_msg","Você se candidatou com sucesso! Continue encaminhando seu curriculo.")
    res.redirect("/")
}).catch((err)=>{
    req.flash("error_msg", "Houve um erro ao cadastrar candidatura: "+err)
    res.redirect("/")
})
})

})

I also tried adding a position but didn't worked: vaga.candidato[0].push(req.user.id)

Here is how I have created the model:

what is any property in schema?

turivishal
– turivishal

2021-06-20 05:17:15 +00:00
Commented Jun 20, 2021 at 5:17 — turivishal
– turivishal, Commented Jun 20, 2021 at 5:17

hoangdv · Accepted Answer · 2021-06-20 02:45:50Z

1

Check vage object, if it already includes candidatos just push new item to this array, else create new array for candidatos

if (Array.isArray(vaga.candidatos) {
  vaga.candidatos.push(req.user._id);
} else {
  vaga.candidatos = [req.user._id];
}

answered Jun 20, 2021 at 2:45

hoangdv

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2 Comments

Gabriel Donada Over a year ago

Hi, looks like that worked, but the data has been not inserted. Looking in MongoDB I received an Object, but there is no data available after inserting it. I've checked and there is data when inserting, but that is not saving. I also tried to change the model to 'type: Array'. Do you know how can I fix it?

Gabriel Donada Over a year ago

I used "Object.values(JSON.parse(JSON.stringify(vaga.candidatos)))" and worked, thanks for your help

aldison · Accepted Answer · 2021-06-20 02:42:16Z

1

At the line 16, im not sure if "any: array" exist because any and array are two data types. Try to remove that line.

answered Jun 20, 2021 at 2:42

aldison

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1 Comment

Gabriel Donada Over a year ago

The guy above helped regarding adding, but that is not adding exactly, as I mentioned on the comments, I guess that it is connected with what you said, I tried changing the model to 'Array' only, and I received an error saying that cannot cast, so I tried to String as well and didn't worked as well.

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