laravel Select2 - 多个标签不起作用
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Select2 - Multiple tags not working
提问by noobmaster69
I'm trying to use Select2 (https://select2.github.io) to allow a user to type multiple tags into a field before submitting a form. In my Laravel PHP app, I'll then take those tags, determine if they exist and add them into a database.
我正在尝试使用 Select2 ( https://select2.github.io) 来允许用户在提交表单之前在字段中键入多个标签。在我的 Laravel PHP 应用程序中，我将获取这些标签，确定它们是否存在并将它们添加到数据库中。
My problem is that I can't seem to get Select2 to recognise there are multiple tags being entered by the user. When I interrogate the form data, I only see the LAST tag a user typed as opposed to ALL the tags.
我的问题是我似乎无法让 Select2 识别用户输入了多个标签。当我查询表单数据时，我只看到用户输入的最后一个标签，而不是所有标签。
My Select2 element is:
我的 Select2 元素是：
<select class="tags-field" name="tags" data-tags="true" data-placeholder="TAGS" multiple="multiple">
</select>
and my JQuery is:
我的 JQuery 是：
$(function() {
$(".tags-field").select2({
maximumSelectionLength: 3,
tokenSeparators: [','],
});
}
There are no Javascript errors and it works perfectly fine except I cannot detect ALL the tags.
没有 Javascript 错误，它工作得很好，只是我无法检测到所有标签。
回答by Paul Vidal
To cause PHP to make all the selected choices available as an array, suffix your select name with a pair of square brackets, like this:
要使 PHP 将所有选定的选项作为数组可用，请在您的选择名称后加上一对方括号，如下所示：
<select class="tags-field" name="tags[]" data-tags="true" data-placeholder="TAGS" multiple="multiple">
If this form is sent to a PHP program, the value of $_POST['tags'] will be an array. Note that the square brackets in the form control name aren't a part of the array key. You would process such a form like this:
如果将此表单发送到 PHP 程序，则 $_POST['tags'] 的值将是一个数组。请注意，表单控件名称中的方括号不是数组键的一部分。您将处理这样的表单：
<?php
$tags = $_POST['tags'];
// Note that $tags will be an array.
foreach ($tags as $t) {
echo "$t<br />";
}
?>
References here: http://bbrown.kennesaw.edu/papers/php2.html
回答by dm4web
- use hidden input field in order to send all values
- use onsubmit event to set the value of the hidden field
- 使用隐藏输入字段以发送所有值
- 使用 onsubmit 事件设置隐藏字段的值
HTML:
HTML：
<form method="post" action="post.php">
<select multiple id="e1" style="width:300px" name="_state">
<option value="AL">Alabama</option>
<option value="Am">Amalapuram</option>
<option value="An">Anakapalli</option>
<option value="Ak">Akkayapalem</option>
<option value="WY">Wyoming</option>
</select>
<input type="hidden" name="state" value="" />
<input type="submit"/>
</form>
JQ:
江青：
$("#e1").select2();
$('form').submit(function () {
var newvalue = '';
var value = $('select[name="_state"]').val();
if (value) {
newvalue = value;
}
$('input[name="state"]').val(newvalue);
})
