Laurent, what error do you get? I'm not immediately aware of limitations
around using lambdas in Pyramid. This example below works fine with a
lambda as a view:
from pyramid.config import Configurator
from waitress import serve
config = Configurator()
config.add_route('foo', '/')
config.add_view(lambda req: 'foo', route_name='foo', renderer='string')
app = config.make_wsgi_app()
serve(app, listen='*:8080')
On Wed, Mar 13, 2024 at 2:26 PM Mike Orr <sluggos...@gmail.com> wrote:
> I'm not an expert in this, but I think the maybe-resolve functions
> only do lookups when the spec is a string, and pass non-strings
> through unchanged. As far as I know lambdas are regular functions, so
> I'd expect it to pass them through like view callable functions. Maybe
> another exception is occurring, and when Python tries to print the
> traceback, it can't find the lambda's source.
>
> I generally use regular functions instead of lambdas, but I realize
> this is a stylistic choice and some think otherwise. A partial might
> work in your use case:
> config.add_view( functools.partial(_delete_multi,
> arg2_keyword=Doc2Resource) , ...
>
> On Wed, Mar 13, 2024 at 10:50 AM Laurent Daverio <ldave...@gmail.com>
> wrote:
> >
> > Hello list,
> >
> > it seems that Google is allowing me to post on here again. A couple of
> weeks ago, I was banned, both from emailing the list, AND from posting on
> the web group 💩
> >
> > I am trying to create a series of routes based on lambda functions,
> something like:
> >
> > ```
> > config.add_route('doc1.delete_selection', '/doc1/-/delete_selection')
> > config.add_route('doc2.delete_selection', '/doc2/-/delete_selection')
> > config.add_view(
> > lambda request: _delete_multi(request, Doc1Resource),
> > route_name='doc1.delete_selection', request_method='POST',
> renderer='json')
> > config.add_view(
> > lambda request: _delete_multi(request, Doc2Resource),
> > route_name='doc2.delete_selection', request_method='POST',
> renderer='json')
> > ```
> >
> > (I also have `archive_selection` and `unarchive_selection` routes)
> >
> > I'm under the impression that `config.add_view` can't take lambda
> functions as arguments, as it tries to resolve their names ("maybe_dotted",
> "maybe_resolve", etc.). All I can say it that the views seem to be calling
> the wrong functions. This prevents me from using for loops and lambda for
> generating the routes in a more concise way :/
> >
> > Could anyone confirm if I'm correct?
> >
> > Many thanks,
> >
> > Laurent.
> >
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>
>
>
> --
> Mike Orr <sluggos...@gmail.com>
>
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>
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Michael
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