Select2 - Ajax搜索 - 记住最后的结果

I am using Select2 3.5.1. With this plugin I can successfully load remote data. However I am here today to ask a question to improve this search. Here is the step-by-step to understand what I would like to do:

我正在使用Select2 3.5.1。有了这个插件，我可以成功加载远程数据。但是我今天在这里提出一个问题来改进这种搜索。以下是逐步了解我想要做的事情：

Setup a Select2 with remote data loading (using ajax).
设置带有远程数据加载的Select2（使用ajax）。
Click on the Select2 input and search for something.
单击Select2输入并搜索某些内容。
The loading will appear and after some seconds you will see a list of results.
将显示加载，几秒钟后您将看到结果列表。
Click on one of the results listed - the box of results will then disappear.
单击列出的结果之一 - 结果框将消失。
If you click again on the search box, the list will be empty and you will need to type some new text again to have a list of results.
如果再次单击搜索框，则列表将为空，您需要再次键入一些新文本以获得结果列表。

Is it possible that when we click again on the search box, that the list of results previously searched re-appear without any ajax call? Then if the user delete a character or change his search criteria it would then trigger the ajax search again.

是否有可能当我们再次点击搜索框时，先前搜索过的结果列表重新出现而没有任何ajax调用？然后，如果用户删除字符或更改其搜索条件，则它将再次触发ajax搜索。

If it is possible, how would we code that?

如果有可能，我们将如何编码？

I hope my question is clear, please let me know if you have any questions. Thank you.

我希望我的问题很清楚，如果您有任何问题，请告诉我。谢谢。

Here is a very simple code where we do a search that return a list of results. It doesn't really search, but it does return a list when you type something. I am not sure how to use the initSelection that is mentionned in one of the response.

这是一个非常简单的代码，我们进行搜索，返回结果列表。它并不真正搜索，但它会在您输入内容时返回一个列表。我不知道如何使用其中一个响应中提到的initSelection。

<html>
<head>
    <title>
        Test page for ajax cache
    </title>
    <script type='text/javascript' src='../../resources/javascript/jquery/jquery-1.9.1.min.js'></script>
    <link type='text/css' href='../../resources/javascript/select2/select2.css' rel='stylesheet' />
    <script type='text/javascript' src='../../resources/javascript/select2/select2.js'></script>

    <script>
    $(document).ready(function(){
        $('#select').select2({
            ajax: {
                type: 'POST',
                url: 'ajax.php',
                dataType: 'json',
                data: function(term, page){
                    return {
                        autoc: 'country',
                        term: term
                    }
                },
                results: function(data, page){
                    console.log(data);

                    return( {results: data.results} );
                }
            },
            placeholder: 'Search something',
            minimumInputLength: 3,
            width: '333'
        });
    });
    </script>
</head>

<body>
    <input type='text' name='inputdata' id='select' />
</body>
</html>

The very simple ajax.php called:

非常简单的ajax.php调用：

<?php
$results2['more'] = false;
$results2['results'][0] = array('id'=> "1", 'text'=> "California");
$results2['results'][1] = array('id'=> "2", 'text'=> "Canada");
$results2['results'][2] = array('id'=> "2", 'text'=> "Someword");
$results2['results'][3] = array('id'=> "2", 'text'=> "Alberta");
$results2['results'][4] = array('id'=> "2", 'text'=> "New York");

echo json_encode($results2);

1 个解决方案

#1

I did read your post once again. I misunderstood you last time.

我再次阅读了你的帖子。我上次误解了你。

The solution is here.

解决方案就在这里。

   $(document).ready(function () {
        $('#select').select2({
            // this part is responsible for data caching
            dataCache: [],
            query: function (q) {
                var obj = this,
                        key = q.term,
                        dataCache = obj.dataCache[key];

                //checking is result in cache
                if (dataCache) {
                    q.callback({results: dataCache.results});
                } else {
                    $.ajax({
                        url: 'ajax.php',
                        data: {q: q.term},
                        dataType: 'json',
                        type: 'POST',
                        success: function (data) {
                            //copy data to 'cache'
                            obj.dataCache[key] = data;
                            q.callback({results: data.results});
                        }
                    })
                }
            },
            placeholder: 'Search something',
            width: '333',
            minimumInputLength: 3,
        });
        // this part is responsible for setting last search when select2 is opening
        var last_search = '';
        $('#select').on('select2-open', function () {
            if (last_search) {
                $('.select2-search').find('input').val(last_search).trigger('paste');
            }
        });
        $('#select').on('select2-loaded', function () {
            last_search = $('.select2-search').find('input').val();
        });
    });

#1