"it's cheap enough to make such a list (preferably in your
view function)"
thx, it's easy and simple - good idea
On 23. Nov, 16:44 h., Bill Freeman <ke1g...@gmail.com> wrote:
> Possibly the form class is not written to support slicing. Supporting
> itteration only
> requires methods for __iter__() and next(). Slicing, like indexing
> requires implementation
> of __getitem__(), and for slicing to work, this method must check for
> receiving a 'slice'
> object as an index. Since most folks probably can't think of a good
> use for slicing here,
> the maintainers probably just haven't implemented slicing.
>
> Since a list of fields is just a list of references, and doesn't
> involve actually copying
> the fields, it's cheap enough to make such a list (preferably in your
> view function),
> pass that, and slice it. (lists do, of course, implement slicing.)
> Something at least
> that complicated would need to be going on inside the code that would
> implement
> slicing on the form anyway, so this shouldn't have a negative
> performance impact.
>
> Bill
>
> On Mon, Nov 23, 2009 at 10:16 AM, gentlestone <tibor.b...@hotmail.com> wrote:
> > the same result :(
>
> > On 23. Nov, 13:47 h., Doug Blank <doug.bl...@gmail.com> wrote:
> >> On Mon, Nov 23, 2009 at 7:16 AM, gentlestone <tibor.b...@hotmail.com>
> >> wrote:
> >> > why this piece of code doesn't work?
>
> >> > {% for field in form|slice:":2" %}
>
> >> > the result is iterating over all fields, not just the first two fields
>
> >> Perhaps break this up into two parts?
>
> >> {% with form|slice:":2" as formslice %}
> >> (% for field in formslice %}
>
> >> -Doug
>
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