Dynamically setting a key in an object

Question

Dynamically setting a key in an object

I'm trying to dynamically build a query for MongoDB in Node.js. The function that creates it is:

    app.set('searchTerm', function (field, str){
        var i, searchTerm, keywords;
        keywords = str.split(' ');
        searchTerm = {field : str , _keywords : keywords};
        return searchTerm;
    });

My problem is that the object constructed ends up with the string 'field' as a key, not the passed argument. How do I get it to evaluate the argument?

javascript
node.js
mongodb-query

Answer 1

app.set('searchTerm', function (field, str){
    var i, searchTerm, keywords;
    keywords = str.split(' ');
    searchTerm = {_keywords: keywords};
    searchTerm[field] = str;
    console.dir(searchTerm);
    return searchTerm;
});