On Dec 12, 2007 7:25 PM, Tim Lesher <[EMAIL PROTECTED]> wrote:
>
>
> I don't think this question has anything to do with forms--I think
> he's asking "how can I change text in my master.kid to something that
> comes from my db?"
>
If this really is the question, there is a much more simple solution
than creating the same query in every controller: the TurboGears
variable provider. In most of my projects I usually have a module
called util that extends the standard variable providers in TG. If
you only have one thing that you need site wide, you can just as
easily create this in your controllers.py.
The code required is simple, and I'll use your example; getting header
content from your database. We'll assume that you already have the
model set up and it's called PageElement, and it has an id, a name and
a content field. We'll also assume that you're using SA 0.3, although
the method below could be used for anything you like, you don't even
have to interact with the database.
in controllers.py make sure you have the following code, replacing
`projectname` with the module name of your project:
[code]
from turbogears import view
from projectname import model
def get_header_content(self):
return model.PageElement.get_by(name="header")
def append_providers(vars):
vars["get_header_content"] = get_header_content
view.variable_providers.append(append_providers)
[/code]
Now, you could have used a lambda to do that, but for completeness I
used a function to show that your functions _can_ be as complex as
needed.
You can now use `${tg.get_header_content()}` in your templates at any
point. In some cases I create request local caching for things that
may need to be used in multiple places in the same content if you're
querying the database using cherrypy.request to store some data.
I hope that helps ease development of features like this, I know it
was a huge relief for me when I found I could use this method.
--
Lee McFadden
blog: http://www.splee.co.uk
work: http://fireflisystems.com
skype: fireflisystems
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