Question

我正在尝试根据此处的示例创建自定义数据适配器：http://select2.github.io/announcements-4.0.html#query-to-data-adapter。如何使用DataAdapter的定义将创建select2控件的行移到函数外部（参见下面的代码）？

<!DOCTYPE html>
<head>
    <title></title>
    <link href="select2.css" rel="stylesheet" />
    <script type="text/javascript" src="http://code.jquery.com/jquery-2.1.4.js"></script>
    <script type="text/javascript" src="select2.full.js"></script>
    <script type="text/javascript">
        $.fn.select2.amd.require(
            ['select2/data/array', 'select2/utils'],
            function (ArrayData, Utils) {
                function CustomData ($element, options) {
                    CustomData.__super__.constructor.call(this, $element, options);
                }

                Utils.Extend(CustomData, ArrayData);

                CustomData.prototype.query = function (params, callback) {
                    var data = {results: []};
                    data.results.push({id: params.term, text: params.term});
                    data.results.push({id: 11, text: 'aa'});
                    data.results.push({id: 22, text: 'bb'});
                    callback(data);
                };

// Works if uncommented, but this line needs to be elsewhere (in $(document).ready()).
                //$("#my").select2({tags: true, dataAdapter: CustomData});
            });

        $(document).ready(function() {
// This line does not work here.            
            $("#my").select2({tags: true, dataAdapter: CustomData});
        });
    </script>
</head>
<body>
    <select id="my"></select>
</body>
</html>

Answer 1

你通过AMD-Pattern定义它：

$.fn.select2.amd.define('select2/data/customAdapter',[
        'select2/data/array',
        'select2/utils'
    ],
    function (ArrayAdapter, Utils) {

        function CustomDataAdapter ($element, options) {
            CustomDataAdapter.__super__.constructor.call(this, $element, options);
        }
        Utils.Extend(CustomDataAdapter, ArrayAdapter);

        CustomDataAdapter.prototype.current = function (callback) {

            callback(...);

        };

        return CustomDataAdapter;
    }
);

var customAdapter=$.fn.select2.amd.require('select2/data/customAdapter');

$("#my").select2({
    tags: true, 
    dataAdapter: customAdapter
});

Answer 2

对于尝试扩展select2的任何人，下面是一个示例：

// Require the adapter you want to override
$.fn.select2.amd.require(["select2/data/select"], function (Select) {
    let CustomDataAdapter = Select;

    // Simple example, just override the function
    CustomDataAdapter.prototype.current = function (callback) {
        // Your own code
    };

    // Example modifying data then calling the original function (which we need to keep)
    let originalSelect = CustomDataAdapter.prototype.select;
    CustomDataAdapter.prototype.select = function (data) {
        // Your own code
        // Call the original function while keeping 'this' context
        originalSelect.bind(this)(data);
    };

    // Finally, use the custom data adapter
    $('#my-select').select2({
        dataAdapter: CustomDataAdapter
    });

});

选择2 4自定义数据适配器

2 个答案: