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フォームの値を配列で送りたい

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<input value="1" type="hidden" name="book[page_ids][]" multiple>
<input value="2" type="hidden" name="book[page_ids][]" multiple>
<input value="3" type="hidden" name="book[page_ids][]" multiple>
<input value="4" type="hidden" name="book[page_ids][]" multiple>
<input value="5" type="hidden" name="book[page_ids][]" multiple>

こういうHTMLを作りたい。

simple_form_forの場合。

<% @book.pages.each do |p| %>
    <%= f.input :page_ids, as: :hidden, input_html: { multiple: true, value: p.id } %>
<% end %>
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