javascript - Iterate through mongoose find result - Stack Overflow

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I have some trouble getting out data from the result of a query in mongoose: here is my function:

getNinjas : function(res){
    var twisted = function(res){
        return function(err, data){
            if (err){
                console.log('error occured');
                return;
            }
            res.send('My ninjas are:\n');
            for (var i;i<data.length;i++){
                console.log(data[i].name);
            }
                            //I need to process my data one by one here
        }
    }

    Ninja.find({},'name skill',twisted(res));
}

So if I console.log(data) in the getNinjas function, I get the result of my query. How can I access each record one by one? I get nothing in the console like this.

I have some trouble getting out data from the result of a query in mongoose: here is my function:

getNinjas : function(res){
    var twisted = function(res){
        return function(err, data){
            if (err){
                console.log('error occured');
                return;
            }
            res.send('My ninjas are:\n');
            for (var i;i<data.length;i++){
                console.log(data[i].name);
            }
                            //I need to process my data one by one here
        }
    }

    Ninja.find({},'name skill',twisted(res));
}

So if I console.log(data) in the getNinjas function, I get the result of my query. How can I access each record one by one? I get nothing in the console like this.

• javascript
• mongoose

Share Follow edited Sep 3, 2018 at 4:56 Cœur 38.8k2626 gold badges205205 silver badges277277 bronze badges asked Apr 6, 2013 at 16:33 PioPio 4,0621111 gold badges4747 silver badges8181 bronze badges

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2 Answers 2

Sorted by: Reset to default 7

You forgot to initialize i:

for (var i = 0;i<data.length;i++){
//        ^^^^
  console.log(data[i].name);
}

Since you ask how to access each record one by one, it's good to have forEach in your arsenal other than the standard for loop. Once you've crossed the error checking if:

data.forEach(function(record){
    console.log(record.name);
    // Do whatever processing you want
});

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