javascript - How to load JSON data to use it with select2 plugin

Question

I want to use select2 plugin for my project. I followed this example, but it doesn't work for me.

JSON output :

[
    {"ime":"BioPlex TM"},
    {"ime":"Aegis sym agrilla"},
    {"ime":"Aegis sym irriga"},
    {"ime":"Aegis sym microgranulo"},
    {"ime":"Aegis sym pastiglia"},
    {"ime":"Agroblen 15816+3MgO"},
    {"ime":"Agroblen 18816+3MgO"},
    {"ime":"Agrobor 15 HU"},
    {"ime":"Agrocal (Ca + Mg)"},
    {"ime":"Agrocal (Ca)"},
    {"ime":"Agrogold"},
    {"ime":"Agroleaf Power 12525+ME"},
    {"ime":"Agroleaf Power 151031+ME"},
    {"ime":"Agroleaf Power 202020+ME"},
    {"ime":"Agroleaf Power 311111+ME"},
    {"ime":"Agroleaf Power Ca"},
    {"ime":"Agrolution 14714+14 CaO+ME"},
    {"ime":"Agrovapno dolomitno"},
    {"ime":"Agrovit HSF"},
    {"ime":"Agrovit P"},
    {"ime":"Agrozin 32 T"},
    {"ime":"Albatros Hydro"},
    {"ime":"Albatros Sprint"},
    {"ime":"Albatros Standard"},
    {"ime":"Albatros Universal"},
    {"ime":"Algaren"},
    {"ime":"AlgoVital ? Plus"},
    {"ime":"Amalgerol PREMIUM"},
    {"ime":"Amcolon / Novalon"},
    {"ime":"Amcopaste"},
    {"ime":"Aminosprint N8"},
    {"ime":"AminoVital"},
    {"ime":"Ammonium nitrate 33.5%"},
    {"ime":"Ammonium nitrate with calcium sulfate"},
    {"ime":"Ammonium sulfate"}
]

Script :

function formatDjubrivo(data) {
    return data;
}
function formatDjubrivo1(data) {
    return data.ime;

$( "#inputs" ).change(function() {
    console.log('prolazi klik');
    var t = $( this ).val();
    console.log(t);
    if (t=='djubrivo') {
       console.log('prolazi klik if');
       $('#stavka').select2({
          ajax: {
             dataType : "json",
             url      : "djubrivo.php",
             results  : function (data) {
                 return {results: data};
             }
          },
          formatResult : formatDjubrivo
       });
    }else {
       console.log('nije djubrivo');
    }
});

HTML :

<div class="col-md-2" style="padding-right:0px;">
    Vrsta Inputa
    <select id="inputs" name="inputs" class="form-control js-example-responsive">
        <option value="djubrivo">djubrivo</option>
        <option value="pesticidi">pesticidi</option>
        <option value="kultura">kultura</option>
        <option value="voda">voda</option>
    </select>
</div>

<div class="col-md-2" style="padding-right:0px;">
    Stavka
    <input id="stavka" name="stavka" class="form-control js-example-responsive">
</div>

This is the result when I test my code using console.log:

Select2: The AJAX results did not return an array in the results key of the response.

Where did I made mistake?

Answer 1

It appears you are using Select2 4.0, both from the link you provide to the examples and from the error message you are receiving. Your code, however, is written for previous versions of Select2.

If you want to continue to use Select2 4.0:

(1) Change the results ajax option to processResults.

(2) Change the processResults function so the results property of the object it returns is an array of objects, where each object has an id and a text property. One way to do this is to use the $.map() function to create a new array from the one that is returned by the ajax call.

processResults: function (data) {
    return {
        results: $.map(data, function(obj) {
            return { id: obj.ime, text: obj.ime };
        })
    };
}

You can also get rid of the formatResult option.

(3) Use a <select> element, instead of an <input> element.

<select id="stavka" name="stavka" class="form-control js-example-responsive"></select>

jsfiddle