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<%= form_for(@book) do |f| %>

...

 

<div class="param">

 

    <%= f.label :pubhouses %>

 

    <span class="ul">

 

        <% Pubhouse.all.each do |pubhouse| %>

          <label class="li"><%= check_box_tag :pubhouse_ids, pubhouse.id, @book.pubhouses.include?(pubhouse), :name => 'book[pubhouse_ids][]' %> <u><%= pubhouse.title %></u></label><br />

        <% end %>

 

    </span>

 

</div>

 

...

<% end %>