Hi,
On 2011-03-21 5:16 AM, Joshua Bronson wrote:
I noticed jinja2/defaults.py sets "dict" to "lambda **kw: kw" in its
DEFAULT_NAMESPACE. Is there a reason why it's not just set to dict?
dict() behaves differently from Python version to Python version and
some objects expose some of their inner workings to that function and
break the sandbox if enabled. Also the use case of an expanded dict is
limited, one better passes different functions to the environment that
do not need hackery.
I'd like to do {{ url_for(request.endpoint, **dict(request.view_args,
foo=bar) }} in a template (overriding any "foo" value in the current
page's view_args with "bar"), but I can't with the phony dict function.
You are free to override that function with the builtin dict type.
However for that particular use case I recommend something like this:
def modified_url_for(**updates):
args = request.view_args.copy()
args.update(updates)
return url_for(request.endpoint, **args)
app.jinja_env.globals['modified_url_for'] = modified_url_for
And the in the template:
<a href="{{ modified_url_for(page=2) }}">Page 2</a>
Regards,
Armin
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