select2ajax.js

var Select2Item = (function () {
    function formatRepoSelection(item) {
        return item.text;
    }

    function formatRepo(item) {
        return item.text;
    }

    function processData(data) {
        return {
            results: data
        };
    }

    function select2item(classe, url, options) {
        options = options || {};
        var length_search = options.length_search || 3;
        var extra_data = options.extra_data || null;
        $(classe).select2({
            language: 'pt-BR',
            width: '100%',
            ajax: {
                url: url,
                dataType: 'json',
                data: function (params) {
                    var data = { search: params.term };
                    if (extra_data) {
                        return merge_options(data, extra_data);
                    } else {
                        return data;
                    }
                },
                processResults: processData
            },
            minimumInputLength: length_search,
            templateResult: formatRepo,
            templateSelection: formatRepoSelection,
        });
    }

    function merge_options(obj1, obj2) {
        var obj3 = {};
        for (var attrname in obj1) { obj3[attrname] = obj1[attrname]; }
        for (var attrname in obj2) { obj3[attrname] = obj2[attrname]; }
        return obj3;
    }

    return {
        set: select2item
    };
})();