Following query is written in MongoDB, I want to modify it such that when there is no matching record it should return 1.
Code :
db.collection("uses").find({users:uid}).toArray((err,response) => {
if(err){
throw err;
}
if(response){
res.json(uid);
}
else{
res.json("1");
}
})
.find() would return a cursor & since you're using .toArray()
on a cursor then it would return an array of objects/documents if any matched or else an empty array, So in your below code adding response.length
should work :
db.collection("uses").find({users:uid}).toArray((err,response) => {
if(err){
throw err;
}
if(response && response.length){
res.json(uid);
}
else{
res.json("1");
}
})
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