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JavaScript

Posted by Lance Manchester
Lance Manchester
Courses Plus Student 115 Points

ajax json multilevel

I got this to work for some reason, but because I don't know what happened, I tried a different approach but when I want to revert it to the working code, It gave me undefined.

can someone point out where I've gone wrong....

   $.getJSON('js/file.json',function(result){
        var output = "<ul>";
        $.each(result,function(index, value){
            console.log(value);
            output += "<li>" + value.firstName + "</li>";
        }); //end each
        output += "</ul>";
        $("#js-result-list").html(output);
    }); //end getJSON

JSON

    { "users":[
            {
                "firstName":"Ray",
                "lastName":"Villalobos",
                "joined": {
                    "month":"January",
                    "day":12,
                    "year":2012
                }
            },
            {
                "firstName":"John",
                "lastName":"Jones",
                "joined": {
                    "month":"April",
                    "day":28,
                    "year":2010
                }
            }
    ]
}
Lance Manchester
Lance Manchester
Courses Plus Student 115 Points

nvm, I got it. i just add the index or the first level object to my result. like this.

var url = "js/file.json";
    $.getJSON(url,function(result){
        var output = "<ul>";
        $.each(result.users,function(index, value){
            console.log(index, value);
            output += "<li>" +value.firstName + "</li>";
        }); //end each
        output += "</ul>";
        $("#js-result-list").html(output);
    }); //end getJSON

2 Answers

Dave McFarland
STAFF
Dave McFarland
Treehouse Teacher
Dave McFarland
Dave McFarland
Treehouse Teacher

Hi Lance Manchester

In your first example, the JSON file is an object containing a single property, "users", which is an array. So the result variable will be that object. You could re-write the JavaScript like this:

 $.getJSON('js/file.json',function(result){
        var output = "<ul>";
        $.each(result.users,function(index, value){
            console.log(value);
            output += "<li>" + value.firstName + "</li>";
        }); //end each
        output += "</ul>";
        $("#js-result-list").html(output);
    }); //end getJSON

Notice that I don't pass the result variable to $.each. I pass result.users which is the array of users in the JSON file.

Lance Manchester
Lance Manchester
Courses Plus Student 115 Points

yah I figured it out after a few tries. btw you're the guy in the video. what an honor, I like the course. good job!