使用jquery调用从SOLR检索结果 [英] Retrieve results from SOLR using jquery calls
问题描述
我正在努力使用jquery从SOLR获得响应。当我使用下面的代码时，我得到的错误是 Typeerror：数据为空
I am working to get response from SOLR using jquery. When I use the below code I got the error saying Typeerror:data is null
当查看firebug中的代码时，
你能看一下我的代码，并建议代码中的URL样式
When looked at the code in firebug, data in on_data function is null. I think I am missing something in the Solr URL.The URL I am using is http://xxxx.xxx.xxxx.xxx/xxx_xxx/core0/selectcore0/select/?q=%3A&version=2.2&start=0&rows=10&indent=on&wt=json. Can you please take a look at my code, and also suggest me the URL style in the code
<html>
<head>
<title>Solr Search</title>
</head>
<body>
<h3>Solr Search</h3>
Query: <input id="query" />
<button id="search">Search</button>
<hr/>
<div id="results">
</div>
</body>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
<script>
function on_data(data) {
$('#results').empty();
var docs = data.response.docs;
$.each(docs, function(i, item) {
$('#results').prepend($('<div>' + item.name + '</div>'));
});
var total = 'Found ' + docs.length + ' results';
$('#results').prepend('<div>' + total + '</div>');
}
function on_search() {
var query = $('#query').val();
if (query.length == 0) {
return;
}
var url='http://xxxx.xxx.xxxx.xxx/xxx_xxx/core0/selectcore0/select/?q='+query+'&version=2.2&start=0&rows=50&indent=on&wt=json';
$.getJSON(url, on_data);
}
function on_ready() {
$('#search').click(on_search);
/* Hook enter to search */
$('body').keypress(function(e) {
if (e.keyCode == '13') {
on_search();
}
});
}
$(document).ready(on_ready);
</script>
推荐答案
以下是代码的工作版本和更改列表：
1）添加了wrf：围绕JSON响应添加了一个包装函数，在AJAX中使用动态脚本很有用用于指定JavaScript回调函数的标记
2）添加回调：由于JavaScript的跨域安全限制，需要使用JSONP而不是普通的JSON请求。
Here is the working version of your code, and list of changes: 1) added wrf: adds a wrapper-function around the JSON response, useful in AJAX with dynamic script tags for specifying a JavaScript callback function 2) added callback: need to use JSONP instead of an ordinary JSON request, due to JavaScript’s cross-domain security restrictions.
<html>
<head>
<title>Solr Search</title>
</head>
<body>
<h3>Solr Search</h3>
Query: <input id="query" />
<button id="search">Search</button>
<hr/>
<div id="results">
</div>
</body>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
<script>
function on_data(data) {
$('#results').empty();
var docs = data.response.docs;
$.each(docs, function(i, item) {
$('#results').prepend($('<div>' + item.name + '</div>'));
});
var total = 'Found ' + docs.length + ' results';
$('#results').prepend('<div>' + total + '</div>');
}
function on_search() {
var query = $('#query').val();
if (query.length == 0) {
return;
}
var url='http://xxxx.xxx.xxxx.xxx/xxx_xxx/core0/selectcore0/select/?q='+query+'&version=2.2&start=0&rows=50&indent=on&wt=json&callback=?&json.wrf=on_data';
$.getJSON(url);
}
function on_ready() {
$('#search').click(on_search);
/* Hook enter to search */
$('body').keypress(function(e) {
if (e.keyCode == '13') {
on_search();
}
});
}
$(document).ready(on_ready);
</script>
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