On Thursday, October 27, 2011 7:57:31 PM UTC-4, Archibald Linx wrote: > > > 1) Sometimes I see in the documentation "if form.process().accepted:" > and sometimes "if form.accepts(request.vars, session):". What's the > difference between the two ? >
form.process() was added very recently and is now preferred over form.accepts (though the latter is still perfectly fine). See http://web2py.com/book/default/chapter/07#The-process-and-validate-methods. form.process() does the same thing (it actually calls form.accepts()), but returns the form itself (hence the need to add .accepted if you want to see if it was accepted). > > 2) On page 109 ( > http://www.web2py.com/book/default/chapter/03#An-Image-Blog > ), I have not really understood the following sentence : > > "Line 9 processes the submitted form (the submitted form variables are > in request.vars) within the current session (the session is used to > prevent double submissions, and to enforce navigation)." > > Line 9 refers to : "form.accepts(request.vars, session):" > > Would it be different if I would just write : > "form.accepts(request.vars):" ? > Yes, if you leave out the session, it won't create a hidden _formkey field and store the value in the session. This is the mechanism web2py uses to prevent double form submission and CSRF attacks. See http://web2py.com/book/default/chapter/07#Hidden-fields. > 3) On page 108 ( > http://www.web2py.com/book/default/chapter/03#An-Image-Blog > ), there is written : > > if form.process().accepted: > response.flash = 'your comment is posted' > > On page 112 ( http://www.web2py.com/book/default/chapter/03#Adding-CRUD > ), there is written : > > form = SQLFORM(table) > if form.process().accepted: > session.flash = '...' > > Why is it sometimes "response.flash" and sometimes "session.flash" ? > response.flash if the form page will be reloading; session.flash if you are redirecting to a new page. See http://web2py.com/book/default/chapter/07#Forms-and-redirection. Basically, things should hopefully clear up when you read the forms chapter. Anthony
