Re: View decorator for common navigation elements?

wouldn't a template tag work best in a case like this?

something like {% NavBar %} or {% GetNav NavName %}

that way you can have your own cache code inside you template tag
code, like storing the database result into memcached or redis and
avoid a relational db call each page. them you you modify you
navigation data model you can you invalidate the cache and recreate
it. it will also be a lot simplier to reuse in other projects as you
wont have to inlcude a decorator on each view.

On Sep 30, 2:59 am, Victor Hooi <victorh...@gmail.com> wrote:
> Hi,
>
> We have a common navigation bar on nearly every page (view) that contains a
> dropdown - this dropdown is populated with items from a database table. This
> dropdown also has AJAX behaviour attached to it.
>
> I'm thinking I can create a decorator that will retrieve the list from the
> database, and return a Python list
>
> We can then wrap every single view in this decorator, and then pass the list
> to the template for rendering.
>
> Firstly - is there a more elegant alternative, rather than wrapping every
> single view in this decorator? (Middleware? Or is that a poor fit here?
> Anything else?).
>
> And secondly - are there are any performance issues here? We're making
> database calls with every single view, just to get a list for a navigation
> dropdown. Smarter way?
>
> I know I can use the caching middleware to cache entire pages, or even
> template fragments - but how about caching a single list() like this? What
> are other methods people are using to tackle this?
>
> Cheers,
> Victor

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