Add options to dropdown via JQuery AJAX request (as json Object)

Question

I currently try to get into JQuery and, to be more specific, into AJAX requests.

Code:
Javascript:

success: function(json) {
        console.log(json);
        var $el = $("#system");
        $el.empty(); // remove old options
        $el.append($("<option></option>")
            .attr("value", '').text('Please Select'));

        // for each set of data, add a new option
        $.each(json, function(value, key) {
            $el.append($("<option></option>")
                .attr("value", value).text(key));
        });

},

HTML:

<form id="filter">
    <label for="datepicker">
        Date: <input id="datepicker" onchange="updateSystems()" type="text" />
    </label>
    &nbsp;
    <label>from:
        <select id="timespan-from"  name="timespan-from" onchange="updateSystems()" size="1">
            <option value="0">0 Uhr</option>
            ...
            <option value="23">23 Uhr</option>
        </select>
    </label>
    &nbsp;
    <label>to:
        <select id="timespan-to" name="timespan-to" onchange="updateSystems()" size="1">
            <option value="0">23 Uhr</option>
            ...
            <option value="0">0 Uhr</option>
        </select>
    </label>
    &nbsp;
    <label>in System:
        <select id="system" name="system" size="1">
            <!-- this should be updated -->
            <option>Amarr</option>
            <option>JEIV-E</option>
            <option>Jita</option>
            <option>Litom</option>
            <option>Penis</option>
        </select>
    </label>
</form>

This function is triggered whenever I change a field in my document, and should update the elements of a html dropdown.

The AJAX request works, but the dropdown-update does not work as intended. I try to add some <option> fields to the <select> dropdown with the id id=system .

However, the result dropdown always looks like this:

• Please Select
• [object Object]

What needs to be changed so my functions adds my json data to my dropdown menu?

Example JSON return from my php script:

[
    {
        "solarSystemID": "30001171",
        "solarSystemName": "F4R2-Q"
    },
    {
        "solarSystemID": "30001182",
        "solarSystemName": "MB-NKE"
    },
    {
        "solarSystemID": "30004299",
        "solarSystemName": "Sakht"
    },
    {
        "solarSystemID": "30004738",
        "solarSystemName": "1-SMEB"
    }
]

solarSystemID should become the value of the <option> ,
solarSystemName should be the text.

Thanks in advance for any help, I guess I just need a little push in the right direction for it to finally work as intended.

Answer 1

you can use the map method for mapping Solar object to option element.

$('#system').append(json.map(function(sObj){
    return '<option id="'+sObj.solarSystemID+'">'+ sObj.solarSystemName +'</option>'
}));