Select2 在表单 POST 之后获得多项选择

Question

我有这个 select2 多选下拉菜单，它在客户端工作正常，但只发布用户最后选择的内容：

<select class="searchable-dropdown form-control form-control-md" name="payment_methods" id="payment-methods-send" multiple="multiple">
 <%= options_for_select( (::Transaction::SEND_METHODS).collect{ |m| [t(m[:name]), m[:name].parameterize ]}, selected: params[:payment_method] ) %>
</select>

它生成以下标记：

<select class="searchable-dropdown form-control form-control-md" name="payment_methods" id="payment-methods-receive" multiple="multiple">
 <option value="coupons">Coupons</option>
 <option value="paypal">Paypal</option>
 <option value="skrill">Skrill</option>
 <option value="revolut">Revolut</option>
 <option value="zelle">Zelle</option>
 <option value="transferwise">Transferwise</option>
 <option value="swift-bank-transfer">SWIFT bank transfer</option>
 <option value="european-bank-transfer">European bank transfer</option>
 <option value="us-bank-transfer">US bank transfer</option>
 <option value="uk-bank-transfer">UK bank transfer</option>
 <option value="check">Check</option>
</select>

我用它来初始化控件：

$( ".searchable-dropdown" ).select2({ theme: "bootstrap" });

经过多次选择并发送表格后，我在参数中得到了这个：

"payment_methods":"paypal"

Paypal 确实被选中（最后一个），但其他一些选项也是如此。

难道不应该以逗号分隔或其他方式发送它们吗？我做错了什么吗？

Answer 1

没关系，看来我没有问 Google 正确的问题...

Multiple select box is not working in rails

You need to make sure that you are sending an array of answers by changing the name to payment_methods[]

Select2 在表单 POST 之后获得多项选择

Select2 getting multiple selections after form POST

ruby-on-rails

jquery-select2