Select2在表单POST之后获得多项选择

Question

I have this select2 multi-selection dropdown that works fine on the client side but only posts the last selection users make:

<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>

It generates the following markup:

<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>

I've used this to initialize the control:

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

After making several selections and sending the form, I am getting this within params:

"payment_methods":"paypal"

Paypal was indeed selected (last) but so were a bunch of other selections.

Was it not supposed to send them comma-separated or something? Am I doing something wrong?

Answer 1

Nevermind, looks like I wasn't asking Google the right question...

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[]