jQuery select2:重复标记被重新创建 [英] jQuery select2: duplicate tag getting recreated
问题描述
我今天早些时候问了一个问题( jquery select2:error从php-mysql获取数据).但是，我正在尝试修复它，而现在却遇到了一些奇怪的问题.我不确定为什么会这样发生.
I asked a question earlier today (jquery select2: error in getting data from php-mysql). However, I am trying to fix it and doing that now I am getting bit strange issue. I am not sure why it is happening like this.
下面是JavaScript代码.
Below is the JavaScript code.
<div class="form-group">
<label class="col-sm-4 control-label">Product Name</label>
<div class="col-sm-6">
<input type="hidden" id="tags" style="width: 300px"/>
</div>
</div>
<script type="text/javascript">
var lastResults = [];
$("#tags").select2({
multiple: true,
placeholder: "Please enter tags",
tokenSeparators: [","],
initSelection : function (element, callback) {
var data = [];
$(element.val().split(",")).each(function () {
data.push({id: this, text: this});
});
callback(data);
},
ajax: {
multiple: true,
url: "fetch.php",
dataType: "json",
type: "POST",
data: function(term) {
return {q: term};
},
results: function(data) {
return {results: data};
},
},
createSearchChoice: function (term) {
var text = term + (lastResults.some(function(r) { return r.text == term }) ? "" : " (new)");
return { id: term, text: text };
},
});
$('#tags').on("change", function(e){
if (e.added) {
if (/ \(new\)$/.test(e.added.text)) {
var response = confirm("Do you want to add the new tag "+e.added.id+"?");
if (response == true) {
alert("Will now send new tag to server: " + e.added.id);
/*
$.ajax({
type: "POST",
url: '/someurl&action=addTag',
data: {id: e.added.id, action: add},
error: function () {
alert("error");
}
});
*/
} else {
console.log("Removing the tag");
var selectedTags = $("#tags").select2("val");
var index = selectedTags.indexOf(e.added.id);
selectedTags.splice(index,1);
if (selectedTags.length == 0) {
$("#tags").select2("val","");
} else {
$("#tags").select2("val",selectedTags);
}
}
}
}
});
</script>
这是php代码( fetch.php )
<?php
// connect to database
require('db.php');
// strip tags may not be the best method for your project to apply extra layer of security but fits needs for this tutorial
$search = strip_tags(trim($_GET['q']));
//$search='te';
// Do Prepared Query
$query = $mysqli->prepare("SELECT tid,tag FROM tag WHERE tag LIKE :search LIMIT 4");
// Add a wildcard search to the search variable
$query->execute(array(':search'=>"%".$search."%"));
// Do a quick fetchall on the results
$list = $query->fetchall(PDO::FETCH_ASSOC);
// Make sure we have a result
if(count($list) > 0){
foreach ($list as $key => $value) {
$data[] = array('id' => $value['tid'], 'text' => $value['tag']);
}
} else {
$data[] = array('id' => '0', 'text' => 'No Products Found');
}
// return the result in json
echo json_encode($data);
?>
select2版本为3.5
以上代码能够通过使用fetch.php从数据库发送/接收请求.
Above code is able to send/receive request from database by using fetch.php.
问题在我的数据库中，有两条记录 test &标记 temp 时，会创建新标记.
Problem is in my database there are two records test & temp when I tag any one of them it create new tag.
它应该像这样工作:如果数据库具有值，那么它将不会创建具有相同名称的新标签.
推荐答案
最后，它现在可以工作了.我要感谢@alex& @milz的支持. 这是完整的n个最终代码.现在不创建重复的标签.但是，我正在努力在数据库中添加标签.
Finally it is working now. I would like to thanks @alex & @milz for their support. Here is the full n final code. Now duplicate tags are not creating. However, i am working to add tag in database.
php/html文件
<div class="form-group">
<label class="col-sm-4 control-label">Product Name</label>
<div class="col-sm-6">
<input type="hidden" id="tags" style="width: 300px"/>
</div>
</div>
<script type="text/javascript">
var lastResults = [];
$("#tags").select2({
multiple: true,
tags: true,
placeholder: "Please enter tags",
tokenSeparators: [',', ' '],//[","],
initSelection : function (element, callback) {
var data = [];
$(element.val().split(",")).each(function () {
data.push({id: this, text: this});
});
callback(data);
},
ajax: {
multiple: true,
url: "fetch.php",
dataType: 'json',
// type: "POST",
data: function(term,page) {
return {
term: term
};
},
results: function(data,page) {
lastResults = data;
return {results: data};
},
},
maximumSelectionSize: 3,
minimumInputLength: 3,
createSearchChoice: function(term) {
console.log($(this).attr('data'));
var text = term + (lastResults.some(function(r) {
console.log(r.text);
console.log(term);
return r.text == term
}) ? "" : " (new)");
return {
id: term,
text: text
};
},
});
$('#tags').on("change", function(e){
if (e.added) {
if (/ \(new\)$/.test(e.added.text)) {
var response = confirm("Do you want to add the new tag "+e.added.id+"?");
if (response == true) {
alert("Will now send new tag to server: " + e.added.id);
/*
$.ajax({
type: "POST",
url: '/someurl&action=addTag',
data: {id: e.added.id, action: add},
error: function () {
alert("error");
}
});
*/
} else {
console.log("Removing the tag");
var selectedTags = $("#tags").select2("val");
var index = selectedTags.indexOf(e.added.id);
selectedTags.splice(index,1);
if (selectedTags.length == 0) {
$("#tags").select2("val","");
} else {
$("#tags").select2("val",selectedTags);
}
}
}
}
});
</script>
这是从数据库获取数据的php文件. fetch.php
Here is the php file to get the data from database. fetch.php
<?php
// connect to database
require('db.php');
// strip tags may not be the best method for your project to apply extra layer of security but fits needs for this tutorial
//if(isset($_GET)){
$search = strip_tags(trim($_GET['term']));
// Do Prepared Query
$query = $mysqli->prepare("SELECT tid,tag FROM tag WHERE tag LIKE :search LIMIT 4");
// Add a wildcard search to the search variable
$query->execute(array(':search'=>"%".$search."%"));
$list = $query->fetchall(PDO::FETCH_ASSOC);
if(count($list) > 0){
foreach ($list as $key => $value) {
$data[] = array('id' => $value['tag'], 'text' => $value['tag']);
}
} else {
$data[] = array('id' => 'No Products Found', 'text' => 'No Products Found');
}
echo json_encode($data);
?>
花了很多时间.将近3天.我希望它可以节省一些人的精力.
It took lots of time. Almost 3 days. I hope it will save someone efforts.
这篇关于jQuery select2:重复标记被重新创建的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
