title: Adding a column of checkboxes to an SQLFORM.grid
body: <p>I'd like to have a grid in which the first column contains no header, and consists of checkboxes, the last couple of columns are columns of links (generated with the 'links' parameter), and the intermediate columns are generated from database fields with the 'fields' parameter. What's the best way to go about generating the column of checkboxes? Thank you.</p>