how to save custom form fields data in admin in magento 2?

Question

I have created three custom form fields in checkout payment section.

I have followed this link to create form fields (How to add additional field to checkout payment (Magento 2)).

Now want to know how to save these fields data in the database.

Thanks

Answer 1

You can add getData method in your js file:

getData: function() {
            return {
                'method': "methodcode",
                'additional_data': {
                    'customfield1': $('#'+this.getCode()+'_customfield1').val(),
                    'customfield2': $('#'+this.getCode()+'_customfield2').val(),
                }
            };
        },

then you can get these fields in additional data param in your payment model:

namespace Namespace\ModuleName\Model;

class Payment extends \Magento\Payment\Model\Method\Cc
{
  public function assignData()
  {
     $post = $data->getData()['additional_data'];
     // write your custom code
}
}