On Wed, Jul 7, 2010 at 7:02 PM, BrianTheLion <[email protected]> wrote:
> Hi,
>
> First of all, despite what it says in the documentation,
> routes.url_for is indeed available as h.url_for in my templates on
> v0.9.7.
>
> I haven't touched a thing in lib/helpers.py. Is this now
> "fixed" in v1.0? If not, when can we expect to have to start manually
> adding helpers per the documentation?
>
> I ask because I am interested in *programatically* adding some helper
> functions to h for use in my templates. I'm writing a module that will
> live in myproject/lib and I'd like to have this module's __init__.py
> make the functions available without any further intervention from
> module users, e.g., without them having to edit lib/helpers.py. In the
> past, this would have been as easy as
>
> <code>
> from pylons import h
If this works in 0.9.7 or 1.0, it's an unintended feature. The proper
syntax now is:
import myapp.lib.helpers as h
> h.a_helpful_fn = my_helpful_fn
Can't you turn it around and have helpers.py import the items from the
other module in the normal way? These aren't "dynamic" in the sense of
changing at runtime. Or are they?
In any case, if you think you must put things into 'h', it's OK to do
so. But do it through 'myapp.lib.helpers', not 'pylons.h'.
As for your general question, Pylons 0.9.6 and before had a more
magical 'h', and the default imports in helpers.py imported the rails
helpers from WebHelpers. In 0.9.7 we got out of the business of
assuming which helpers you'd want, so you have to put them into
helpers.py yourself. But of course, existing applications would keep
whatever imports they had. Also in Pylons 0.9.7, pylons.url was
introduced to replace h.url_for, which depends on an ugly global
singleton. In Pylons 1.0, support for url_for was dropped (although it
may not be so in your app, depending on a middleware.py setting).
pylons.h should have been dropped in 0.9.7 but it may have been
overlooked. ``render_mako()`` imports 'h' into the template namespace
via ``pylons.templating.pylons_globals()`` and a config variable
"pylons.h" (a string key).
--
Mike Orr <[email protected]>
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