如何为自动完成功能获取正确的 json 数据类型？

发布于 2024-12-03 23:19:55 字数 2727 浏览 1 评论 0原文

当我尝试此操作时，它按预期工作：在两个字符之后，它显示匹配的条目。

<!DOCTYPE HTML>
<html>
<head>
    <meta http-equiv="content-type" content="text/html; charset=UTF-8" />
    <script src="development-bundle/jquery-1.6.2.js"></script>
    <script src="development-bundle/ui/jquery.ui.core.js"></script>
    <script src="development-bundle/ui/jquery.ui.widget.js"></script>
    <script src="development-bundle/ui/jquery.ui.position.js"></script>
    <script src="development-bundle/ui/jquery.ui.autocomplete.js"></script>
    <script type="text/javascript">
        $( document ).ready( function() {
            var data = [ 'John', 'Jack', 'Joe', 'Lisa', 'Barbara' ];
            $( "#name" ).autocomplete({
                source: data,
                minLength: 2
            });
        });
    </script>
</head>
<body>
<form>
    <table>
        <tr><td>Name:</td><td><input type="text" 
        id="name" name="name" /></td></tr>
    </table><br />
    <input type="submit" value="OK"/>
</form>
</body>
</html>

这表现得不同：在两个字符之后它总是显示所有条目？
第二个例子有什么问题？

#!/usr/local/bin/perl
use warnings;
use 5.014;
use utf8;
use Mojolicious::Lite;

get '/eingabe' => sub {
    my $self = shift;
    $self->render( 'eingabe' );
};

get '/search_db' => sub {
    my $self = shift;
    $self->render( json => [ 'John', 'Jack', 'Joe', 'Lisa', 'Barbara' ] );
};

app->start;

__DATA__
@@ eingabe.html.ep
<!DOCTYPE HTML>
<html>
<head>
    <meta http-equiv="content-type" content="text/html; charset=UTF-8" />
    <script src="/development-bundle/jquery-1.6.2.js"></script>
    <script src="/development-bundle/ui/jquery.ui.core.js"></script>
    <script src="/development-bundle/ui/jquery.ui.widget.js"></script>
    <script src="/development-bundle/ui/jquery.ui.position.js"></script>
    <script src="/development-bundle/ui/jquery.ui.autocomplete.js"></script>
    <script type="text/javascript">
        $( document ).ready( function() {
            $( "#name" ).autocomplete({
                source: '/search_db',
                minLength: 2
            });
        });
    </script>
</head>
<body>
<form>
    <table>
        <tr><td>Name:</td><td><input type="text"
        id="name" name="name" /></td></tr>
    </table><br />
    <input type="submit" value="OK"/>
</form>
</body>
</html>

原文

When I try this, it works as expected: after two characters its shows the matching entries.

<!DOCTYPE HTML>
<html>
<head>
    <meta http-equiv="content-type" content="text/html; charset=UTF-8" />
    <script src="development-bundle/jquery-1.6.2.js"></script>
    <script src="development-bundle/ui/jquery.ui.core.js"></script>
    <script src="development-bundle/ui/jquery.ui.widget.js"></script>
    <script src="development-bundle/ui/jquery.ui.position.js"></script>
    <script src="development-bundle/ui/jquery.ui.autocomplete.js"></script>
    <script type="text/javascript">
        $( document ).ready( function() {
            var data = [ 'John', 'Jack', 'Joe', 'Lisa', 'Barbara' ];
            $( "#name" ).autocomplete({
                source: data,
                minLength: 2
            });
        });
    </script>
</head>
<body>
<form>
    <table>
        <tr><td>Name:</td><td><input type="text" 
        id="name" name="name" /></td></tr>
    </table><br />
    <input type="submit" value="OK"/>
</form>
</body>
</html>

This behaves different: after two characters it shows always all entries?
What is wrong with the second example?

#!/usr/local/bin/perl
use warnings;
use 5.014;
use utf8;
use Mojolicious::Lite;

get '/eingabe' => sub {
    my $self = shift;
    $self->render( 'eingabe' );
};

get '/search_db' => sub {
    my $self = shift;
    $self->render( json => [ 'John', 'Jack', 'Joe', 'Lisa', 'Barbara' ] );
};

app->start;

__DATA__
@@ eingabe.html.ep
<!DOCTYPE HTML>
<html>
<head>
    <meta http-equiv="content-type" content="text/html; charset=UTF-8" />
    <script src="/development-bundle/jquery-1.6.2.js"></script>
    <script src="/development-bundle/ui/jquery.ui.core.js"></script>
    <script src="/development-bundle/ui/jquery.ui.widget.js"></script>
    <script src="/development-bundle/ui/jquery.ui.position.js"></script>
    <script src="/development-bundle/ui/jquery.ui.autocomplete.js"></script>
    <script type="text/javascript">
        $( document ).ready( function() {
            $( "#name" ).autocomplete({
                source: '/search_db',
                minLength: 2
            });
        });
    </script>
</head>
<body>
<form>
    <table>
        <tr><td>Name:</td><td><input type="text"
        id="name" name="name" /></td></tr>
    </table><br />
    <input type="submit" value="OK"/>
</form>
</body>
</html>

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雪落纷纷 2024-12-10 23:19:55

在第一个示例中，您使用数组来设置自动完成的选项。在第二个中，数组被序列化为 json，但是自动完成功能期望 json 具有特定的键/值对（id、标签和值）。

我认为最好的选择是为自动完成数据定义自定义回调，如来自 nettuts 的本教程。

您的自动完成代码将类似于以下内容：

$("#name").autocomplete({
    source : function(req, add){ 
        $.getJSON("/search_db" + req, function(data){
            suggestions = [];

            len = data.length;

            for(var i = 0; i < len; i++){
                suggestions.push(data[i]);
            };

            add(suggestions); //passing an array to add will populate the suggest list

        });//end getjson callback
    }
})

In your first example you are using an array to set the options of the autocomplete. In the second the array is being searilizied into json, however the autocomplete expects the json to have specific key/value pairs (id, label, and value).

I think your best bet would be to define a custom callback for the autocomplete's data as shown in this tutorial from nettuts.

Your autocomplete code would look something similar to this:

$("#name").autocomplete({
    source : function(req, add){ 
        $.getJSON("/search_db" + req, function(data){
            suggestions = [];

            len = data.length;

            for(var i = 0; i < len; i++){
                suggestions.push(data[i]);
            };

            add(suggestions); //passing an array to add will populate the suggest list

        });//end getjson callback
    }
})

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