This is the main reason that I switched to Cheetah and the "containment" mothod.Unless I am missing something... the only other ways to handle this would be:1) Pass the information through the url. 2) Pass the information through the session.No, neither of these are very good solutions. Using sessions for too much can cause problems with non-linear navigation, for instance when A style I also use for all my sites is to have a simple list of messages that get displayed at the top of the next page to be loaded. So when a
Basically my servlet processes any action, assembles the data into classes, and then just calls the appropriate template to render:
An internal user will see a completely differnt welcome page then client will. All of the logic is here in the servlet, and both templates are very clean.
if (user.employee):
#Internal guys need a class w/ info about thier clients
clientStats = CSData.clientStats(ClientList)
....
# Pull the template for an internal user
templateFile= os.path.join(
os.path.dirname(self.serverSidePath()),
'templates','WelcomeEmp.ctd')
t = Template( file=templateFile,
searchList=[{'user':user, 'boxContents':boxContents,
'ClientList':ClientList}])
else:
#Clients only need info about thier system
dataStats=CSData.summaryStats(user)
templateFile=os.path.join(
os.path.dirname(self.serverSidePath()),
'templates','Welcome.ctd')
t = Template(file=templateFile,
searchList=[{'user':user,
'boxContents':boxContents},dataStats])
#Finally just write out the template
self.writeln(t)
Want a skinnable site? just add a variable for a directoy to the os.path.join line. This is old code, now I precompile the templates in the servlet __init__ , but this method is a better example.
There are some issues doing things this way that a redirect will avoid. Hitting REFRESH on the brower will re-execute any actions. But you can code for that if needed as well.
I also use this method for things like a print preview or .xls download. If you want the data as a download I just call a cheetah template that looks like a tab delimited file and send that.
-Aaron
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