[albatross-users] Getting things out of session_vars?

Thu Apr 24 06:34:02 EST 2003

Here is a pretty minimal example that shows the page_enter problem.

login.py: ================================

def page_enter(ctx):
    if not hasattr(ctx.locals, 'login_message'):
        setattr(ctx.locals, 'login_message',  'Please enter your 
username and password:')
    if not hasattr(ctx.locals, 'user'):
        setattr(ctx.locals, 'user', '')

def page_process(ctx):
    if ctx.req_equals('login'):
        if hasattr(ctx.locals, 'user') and hasattr(ctx.locals, 'passwd'):
            user, passwd = ctx.get_value('user'), ctx.get_value('passwd')
            if user and passwd:
                if authenticate(user, passwd):
                    ctx.add_session_vars('user', 'passwd')
                    ctx.set_page('controlpanel')

    return

def page_display(ctx):
    ctx.run_template('login.html')
==========================================
login.html: ===================================

<html><head></head><body>
<al-form method="post">
<h1><al-value expr="login_message"></h1>
<al-input type="text" name="user" expr="user">
<al-input type="text" name="passwd">
</al-form>
</body></html>

==========================================

Run this and it shows up fine the first time.  If you submit true values 
for user and passwd, it will forward just fine.  However, if you submit 
bad values:

Template traceback (most recent call last):
  File "/www/htdocs/albatross/new_cust_wizard/login.html", line 16, in al-form
<al-form method="post">
  File "/www/htdocs/albatross/new_cust_wizard/login.html", line 21, in al-value

Traceback (most recent call last):
[Snip]
File "<albatross>", line 0, in ?
NameError: name 'login_message' is not defined

I thought that once I had defined a default value in page_enter, it 
would stay set. That is why I thought that perhaps page_enter was not 
being called.  Could someone point out my error?

Thanks,

VanL

[albatross-users] Getting things *out* of session_vars?

[albatross-users] Getting things out of session_vars?