How can I use lodash/underscore to sort by multiple nested fields?

Question

I want to do something like this:

var data = [
    {
        sortData: {a: \'a\', b: 2}
    },
    {
        sortData: {a: \'a\', b: 1}
    },
    {
        sort         


        

Answer 1

I think this could work in most cases with underscore:

var properties = ["sortData.a", "sortData.b"];
data = _.sortBy(data, function (d) {
    var predicate = '';
    for (var i = 0; i < properties.length; i++)
    {
        predicate += (i == properties.length - 1 
                           ? 'd.' + properties[i]
                           : 'd.' + properties[i] + ' + ')
    }
    return eval(predicate)
});

It works and you can see it in Plunker