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How to convert array values ​​to recursive field names of another variable in Javascript

I need to convert values ​​from one Array variable to fields of another variable in Javascript.

My variable

field = ["entries", "body"]

and he needs to become something like

req.body.entries.body

I tried to do something like

field.forEach(function(prop){
   req.body[prop] = "...";
}

but this only works on req.body.entries and req.body.body. And I need it to go all the way to req.body.entries.body

I do this to get the data from the form in the document field (named entries [body]), do some cleaning of that data, and then pass it back to node.js, as if it were a request that was originally made.

UPDATE

All I have to do is basically

exports.sanitize = function(field){

    // field = ["entry","body"];

    return function(req, res, next){
        val = getField(req, field); // val = "Some string with data"
        val = some_process(val); // some_process is a function that cleans up the string

        req.body.entry.body = val; // HOW TO TAKE entry.body from the field array???

        next();
    }
};

, , , - entry.body, , .

, , .

!

+3
4

:

var fields = [ "field1", "field2", "field3", "field4" ];
var obj = req.body;
fields.forEach(function(prop) {
    obj[prop] = {};
    obj = obj[prop];
});
+1

var obj = req.body;
for (var i=0; i<fields.length-1; i++)
    obj = obj[fields[i]];
var prop = fields[i];

obj[prop] = cleanUp(obj[prop]);
0

This will only work if req.body.entries.body is already defined:

field = ["entries","body"];

var toeval="req.body";
field.forEach(function(prop){
       toeval+="."+prop;
});
toeval+="=\"...\"";
eval(toeval);
0
source

I was able to accomplish this using recursion. Hope this helps!

var foo = {
    bar: {}
};

var fields = ['foobar', 'barfoo'];

function setVar (currentVar, arr, counter) {
    if (arr[counter] === undefined) {
        return;
    }

    currentVar[arr[counter]] = {};
    setVar(currentVar[arr[counter]], arr, counter + 1);
}

setVar(foo.bar, fields, 0);
0
source

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