Mongoose does not update my array in the database - arrays

Question

I'm trying to update my collection with mongoose.
This is my Schema:
var FamilySchema = mongoose.Schema({
construction: {
type: Array,
default: [
["foundry", 0],
["farm", 0],
["sawmill", 0]
]
}
});
And this is my code:
app.put('/construction/updateConstruction/:id', (req, res) => {
let id = req.params.id;
Family.findById(id, (err, familiaDB) => {
if (err) {
return res.status(500).json({
ok: false,
err
});
}
if (!familiaDB) {
return res.status(400).json({
ok: false,
err
});
}
// I want to update the value of the posicion 0 in the array.
familiaDB.construction[0][1] = 1;
familiaDB.save();
console.log(familiaDB);
});
});
Result in console.log after making the request:
Escuchando puerto: 3000
Base de datos ONLINE
{ state: true,
construction:
[ [ 'foundry', 1 ],
[ 'farm', 0 ],
[ 'sawmill', 0 ],
_id: 5bb8d69c604625211c572ada,
__v: 0 }
In console.log everything is fine and updated, but in my db it is not updated. I have checked it many times in robomongo and never updates it.

Answer 1

The quickest way to do this would be with findOneAndUpdate:
Family.findOneAndUpdate(
{ _id: mongoose.Types.ObjectId("YOURID") },
{ $set: { 'construction.0.1': 'YourValue' }}
)
This will do it in one statement.
Now instead of doing this by index you can do it with $elemMatch and update the correct one via:
Family.findOneAndUpdate(
{_id: ObjectId("YOURID"), 'cons': { $elemMatch: { '0': 'foundry' }}},
{ $set: { 'cons.$.1': 'YourValue' } }
)