如何在Select2中从数据源设置数据*？

Question

我使用选择二如下：

$('select#fields').select2({ 
    placeholder: 'Select a field', 
    data: data.fields 
}); 

data.fields是这样一个JSON：

"fields": [ 
    { 
    "id": "companies_id", 
    "text": "companies_id", 
    "data-type": "int" 
    }, 
    { 
    "id": "parent_companies_id", 
    "text": "parent_companies_id", 
    "data-type": "int" 
    }, 
    { 
    "id": "client_of_companies_id", 
    "text": "client_of_companies_id", 
    "data-type": "int" 
    }, 
    { 
    "id": "asset_locations_id", 
    "text": "asset_locations_id", 
    "data-type": "int" 
    }, 
    { 
    "id": "companies_name", 
    "text": "companies_name", 
    "data-type": "varchar" 
    }, 
    { 
    "id": "companies_number", 
    "text": "companies_number", 
    "data-type": "varchar" 
    } 
] 

id和text用于填充选项值，我可以使用第三值data-type和将它设置为<option>的属性？如果是这样如何？任何可以给我一个例子吗？

Answer 1

其实 - 选择2默认保存所有在<option>元素的data('data')变量的属性，它创造的，你可以随时使用$(<option>).data('data')访问这些值，但请记住，它不是一样.data('type')为data-type="value"。您需要使用属性的完整名称。

下面是如何获得select事件的data-type价值的例子：

var $example = $("#s1").select2({ 
 
    data: [ 
 
     { 
 
      "id": "companies_id", 
 
      "text": "companies_id", 
 
      "data-type": "int", 
 
      "data-extra": '1' 
 
     }, 
 
     { 
 
      "id": "parent_companies_id", 
 
      "text": "parent_companies_id", 
 
      "data-type": "int", 
 
      "data-extra": '2' 
 
     }, 
 
     { 
 
      "id": "client_of_companies_id", 
 
      "text": "client_of_companies_id", 
 
      "data-type": "int", 
 
      "data-extra": '3' 
 
     }, 
 
     { 
 
      "id": "asset_locations_id", 
 
      "text": "asset_locations_id", 
 
      "data-type": "int", 
 
      "data-extra": '4' 
 
     }, 
 
     { 
 
      "id": "companies_name", 
 
      "text": "companies_name", 
 
      "data-type": "varchar", 
 
      "data-extra": '5' 
 
     }, 
 
     { 
 
      "id": "companies_number", 
 
      "text": "companies_number", 
 
      "data-type": "varchar", 
 
      "data-extra": '6' 
 
     } 
 
    ], 
 
}).on('select2:select', function(e) { 
 
    console.log(e.params.data['data-type'], e.params.data['data-extra']); 
 
});

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.3/css/select2.min.css" /> 
 
<script type="text/javascript" src="https://code.jquery.com/jquery-3.1.0.js"></script> 
 
<script src="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.3/js/select2.js"></script> 
 
<select id="s1"> 
 
</select>