如何将多个选择选项字段的值发送到控制器

Question

I have a form for a model "Cell" that can be cloned using javascript . I have both text fields and select fields in the form that can be cloned. Since the cloned element produces an array of Strings, I have sent the text elements as an array by changing the name attribute of the field using the format: cell[ ]['name'] . However, f.select field in rails comes with a default name attribute cell[category_id] . Due to this, I keep getting the error:

Invalid request parameters: expected Hash (got Array) for param `cell'.

This is the code:

= form_for @cell do |f|
  #clone
    .form.rowField
      = f.text_field :name, name: 'cell[][name]', class: "form-control"
      = f.select :category_id, options_for_select(Category.all.pluck('name'))
      i.fas.fa-plus-circle#addrow
    = f.submit "Save", class: "button btn btn-primary"

The javascript code for cloning the form is

$('#addrow').click(function () {
        var row = document.querySelector('.rowField');
        var cloneRow = row.cloneNode(true);
        var target = document.querySelector('#clone');
        cloneRow.querySelectorAll('input').forEach(function (input) {
            input.value = "";
        });
        target.appendChild(cloneRow);
    });

Is there a way to change to name attribute of the select tag from cell[category_id] to cell[][category_id] ?

Answer 1

我通过将选择字段的名称更改为：

= f.select :category_id, options_for_select(Category.all.pluck('name')), {}, {name: 'cell[][category_id]'}