You've got two separate problems here:
1) choosing which component to render at runtime without a fixed list of
possibilities
2) pulling the template from the database
The first problem is addressed by Michael Henderson's DynamicBlock:
http://www.behindthesite.com/blog/C1931765677/E1630021481/
http://www.behindthesite.com/blog/C1931765677/E20060309215538/index.html
I posted something on the second problem a while ago:
http://www.mail-archive.com/users@tapestry.apache.org/msg06927.html
You should be aware that (as far as I know) tapestry cannot remove
individual pages from its page cache so you can't modify a template and
see the changes immediately unless you either have page caching turned
off or you use the reset service to wipe the whole cache. Neither of
those are acceptable for a production environment. The solution I came
up with versions the templates and calls them by ID. I have another
class lying around that keeps track of the most recent component ID for
a given name.
The really fun stuff was integrating this with the DynamicBlock
component and our user preference system to produce a component that
took a user attribute name, looked up that attribute for the current
user and displayed the correct component.
-Steve
Moore, Andrew wrote:
Hi,
I'm planning on writing a content management system in Tapestry.
The plan is that the users should be able to write and design their own html
pages, and then with a simple tapestry reference (with all the properties
set in a page specification) get all the dynamic content entered into their
html pages.
If there was only one template that everybody used this would be simple, but
as I want each user to be able to design their own template, I'm not sure if
this is possible.
As far as I am aware (and I'm a complete newbie to Tapestry) as the .html
files live inside the WEB-INF directory with the .page files there probably
isn't an easy way to do this.
Is there any way at run time of dynamically choosing the template (.html)
file that is used to generate the page? - pulling a template name from a
database?
Cheers
Andrew
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