collection_check_boxes hidden field ignores :form option #51606
Description
hidden field generated from collection_check_boxes ignores form: as html_options
Steps to reproduce
<%= form_with(url: parents_url, scope: :search, method: :get, id: 'myform') do |f| %>
<%= f.search_field :name %>
<%= f.submit %>
<% end %>
<%= collection_check_boxes :search, :parent_ids, Parent.all, :id, :name, {}, {form: 'myform'} %>Expected behavior
<form id="myform" action="http://localhost:3000/parents" accept-charset="UTF-8" method="get">
<input type="search" name="search[name]" id="search_name">
<input type="submit" name="commit" value="Save Search" data-disable-with="Save Search">
</form>
<input form="myform" type="hidden" name="search[parent_ids][]" value="" autocomplete="off">
<input form="myform" type="checkbox" value="1" name="search[parent_ids][]" id="search_parent_ids_1">
<label for="search_parent_ids_1">Parent_1</label>Actual behavior
<form id="myform" action="http://localhost:3000/parents" accept-charset="UTF-8" method="get">
<input type="search" name="search[name]" id="search_name">
<input type="submit" name="commit" value="Save Search" data-disable-with="Save Search">
</form>
<input type="hidden" name="search[parent_ids][]" value="" autocomplete="off"> <!-- not exist form="myform" -->
<input form="myform" type="checkbox" value="1" name="search[parent_ids][]" id="search_parent_ids_1">
<label for="search_parent_ids_1">Parent_1</label>Probably the same problem as #12344
System configuration
Rails version: 7.1.3.2
Ruby version: 3.3.0
Using collection_check_boxes inside a form is fine, but if you want to use them outside of a form, it is convenient to be able to use the :form option.
For now, I am using include_hidden: false and <%= hidden_field_tag 'search[parent_ids][]', {}, form: 'myform' %> to work around the problem.
Let me know if there's any additional information needed.