title: Odoo 10, upload file
body: <p>is it possible, in odoo 10, to upload a file in the form of a given model ? 
  The user of the custom module has a list of items that he receives from is clients and he needs the invoices of thoses items. I imagine that this files are pdf files, but not necessarely (But I can tell to upload pdfs only if that is simple...).</p>
  
  <p>The problem is, some times, in other technologies, a file is uploaded, but cannot be read when it is downloaded (some kind of corruption). So I really need to know how to do this in the sipliest and correct way.</p>
  
  <p>Thank you So much for the help.</p>