cell_body += my_field.render(value...
with :
  cell_body += str(my_field.render(value...

So that if we want fields non editable, we doesn't have error (str + float)


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@229 20353a03-c40f-0410-a6d1-a30d3c3de9de