Sails.js how to get value from checkbox

I'm trying to get a value from input checkbox when checkbox is checked, then send some text like 'on' into a table field and when checkbox is unchecked, delete the value from table field. Is it there the way to do it?

This is my controller

hide: function(req, res){
    var id = req.param('id');
    var open = req.param('open');

    Category.update({id:id},{open:open}).exec(function(err){
        if(err){
            return res.send('err');
        }

        res.redirect('/diy');

    });
}

this is the html

<% for(var i=0; i<categories.length; i++ ){ %>
                    <tr>
                        <td> <%= categories[i].id %> </td>
                        <td> <%= categories[i].name %> </td>
                        <td><a href="/category/edit?id=<%= categories[i].id %>" class="d-inline btn btn-primary">Edit</a></td>
                        <td><a class="d-line btn btn-danger" href="category/delete?id=<%= categories[i].id %>">Delete</a></td>

                        <form method="POST" action="/category/show">
                        <td><input type="checkbox" name="open" id="check" />Show Catagory</td>
                    </tr>
                <% } %>

            </tbody>
        </table>
                        <input class="btn btn-primary" type="submit" value="submit"/>
                        </form>