Hi,
On 2010-06-17 12:23 PM, angelbit wrote:
I'm trying to create an extension like Django template tags for
jinja2. the basic idea is a tag in the main template( {% widget
last_tweets %} ) that return a node of a source taked from another
file ( widgets/last_tweets.html for example ).
Why do you need an extension for that? A function is perfectly fine:
from jinja2 import contextfunction
@contextfunction
def widget(context, template_name, **extra_context):
t = jinja_env.get_template('widgets/' + template_name)
ctx = dict(context.items())
ctx.update(extra_context)
return t.render(ctx)
jinja_env.globals['widget'] = widget
And then in the template::
{{ widget('last_tweets.html') }}
Now the problem is the Parser class, object of this type his passed
already instantiated on parse hook extension and don't have a method
for pass a custom jinja source code during runtime.
Jinja extensions work ahead of time. They emit nodes from an abstract
syntax tree which are then used to generate sourcecode. This is usually
a very complex topic and only recommended if functions no longer work
which are a lot easier to implement and way easier to debug.
Keep in mind that Jinja2 has capable expressions which can replace about
95% of all Django extensions.
Regards,
Armin
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