jQuery select2在选择时显示optgroup标签 [英] jQuery select2 show optgroup label when selected

问题描述

我正在使用jQuery插件 Select2

I am using the jQuery plugin Select2

如果我具有以下结构的多重选择:

If I have a multiselect with the following structure:

<select name="search-term[]" multiple="multiple">
    <optgroup label="Categories">
    <option value="category_4">Internal</option>
    <option value="category_2">Business</option>
    <option value="category_5">External</option>
    <option value="category_1">Science</option>
    <option value="category_6">Sports and Social</option>
    </optgroup>
    <optgroup label="Event Types">
    <option value="eventtype_2">Meeting</option>
    <option value="eventtype_3">Social Activity</option>
    <option value="eventtype_4">Sporting Activity</option>
    <option value="eventtype_1">Symposium</option>
    </optgroup>
    <optgroup label="Locations">
    <option value="location_2">Office 1</option>
    <option value="location_3">Office 2</option>
    <option value="location_1">Office 3</option>
    </optgroup>
</select>

如果我在optgroup下选择了标签为Locations的"Office 1"，则所选选项上的标签显示为"Office 1"

If I select "Office 1" under the optgroup labelled Locations then the label on the selected option says "Office 1"

是否可以更改此方法，使其也显示optgroup标签，因此选择选项上的标签将显示"Location:Office 1".

Is there a way to change this so that it shows the optgroup label as well so the label on the selection option would say "Location: Office 1".

请参见下图以获取我所指的标签:

See the following image for the label I am referring to:

推荐答案

我最终使用templateSelection选项将其排序，如下所示:

I sorted it in the end using the templateSelection option like so:

$('select').select2({
    templateSelection: function(item)
    {
        value = item.id;
        select_name = item.element.offsetParent.name;

        optgroup_label = $('select[name="'+ select_name +'"] option[value="'+ value +'"]').parent('optgroup').prop('label');

        if(typeof optgroup_label != 'undefined') {
            return optgroup_label+': ' + item.text;
        } else {
            return item.text;
        }
    }
});

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