On Sat, Mar 28, 2015 at 5:37 AM, Stephen J. Butler <stephen.but...@gmail.com
> wrote:

> Let's be accurate here: what PHP, Rails, jQuery, et al. do is not
> "non-standard". There's nothing wrong with their key-value pairs in
> the query string. This is further illustrated by the fact that no
> browser I am aware of has problems encoding them, and QueryDict has no
> problem parsing them (it just doesn't do it with quite the same
> result).
>

Well, there is no adopted standard which says that these query strings are
to be interpreted identically:

foo=bar&foo=baz

foo[]=bar&foo[]=baz

(RFC 3986 specifies the syntax of a query string, but not how to interpret
it)

Historical practice was that each of these would be interpreted as
specifying two values for a particular key, but that the former would
specify values for the key "foo" and the latter for the key "foo[]". Then a
non-standard convention was adopted by some tools to interpret them
identically, as specifying multiple values for the key "foo".

The main issue was jQuery adopted this by default, which in turn has a
history of breaking things for users of Django.


Perhaps it would be better to think about this issue as Plain Standard
> and Enhanced Standard. Django does the bare basics of what is
> required. PHP, Rails, jQuery, et al. go a little further in the
> parsing. But there's absolutely nothing wrong with the choice they
> made.


There is a problem: the choice they made was incompatible with many
pre-existing tools, and with anyone who cared about maintaining easy
compatibility with pre-existing tools. Last time I raised the issue with
jQuery (five years ago), however, breaking Django and other traditional
query string parsing tools by default was considered a wontfix issue on
grounds that it's possible to manually set a flag to get the traditional
behavior.

That was the last time I bothered trying to interact with the jQuery
people. Luckily, I already had good technical reasons for preferring other
JS toolkits :)

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