revert $.param should treat empty arrays/objects like empty strings

[temp01]

$.param ignores the key completly if the value is an empty object or array:

$.param({"foo": {"bar": []} });         // -> ""
$.param({"foo": {"bar": [], foo: 1} }); // -> "foo%5Bfoo%5D=1"
$.param({"foo": {"bar": {}} });         // -> ""

Empty values should be treated like empty strings i.e. (expected output):

$.param({"foo": {"bar": []} });         // -> "foo%5Bbar%5D="
$.param({"foo": {"bar": [], foo: 1} }); // -> "foo%5Bbar%5D=&foo%5Bfoo%5D=1""foo%5Bfoo%5D=1"
$.param({"foo": {"bar": {}} });         // -> "foo%5Bbar%5D="

[temp01]

Commit link:  http://github.com/temp01/jquery/blob/9f0b87f111f34cae54174a88210dea5ffa525c69/src/ajax.js

[john]

Fixed  http://github.com/jquery/jquery/commit/7862c45ad2f32096383a21b8b301155787724476

[anonymous]

Wish this would have been configurable (like using "traditional") for backwards compatibility.

[rekna1@…]

This breaking previous behaviour !! You can not simply change this behaviour.. it breaks existing code!

[anonymous]

Like mentioned in  http://forum.jquery.com/topic/change-of-behavior-in-1-4-4-because-of-bug-6481, it think the default implementation should be the way the browser does it... there is no element for an empty array (cfr the example with checkboxes with the same name attribute!!! )

[dmethvin]

Reopened for possible reversion. See the discussion in the forum thread. Vote on this ticket (at the top of the page) if you 're interested.

[vig]

Replying to dmethvin: This fix seems to have got included in the 1.5 version

[jitter]

Replying to vig:

Replying to dmethvin: This fix seems to have got included in the 1.5 version

The "fix" is in since jQuery 1.4.3 .

The ticket was reopened to evaluate if the fix should be reverted as it breaks previous behavior. Check  http://forum.jquery.com/topic/change-of-behavior-in-1-4-4-because-of-bug-6481 for the discussion

[snover]

The problem is that there is no way to serialize an empty array in a way that makes sense in the x-www-form-urlencoded format. foo[bar]= could either mean empty array, empty string, empty object, or null/undefined value, depending upon how the backend chooses to interpret it. Since neither way of serialization is really “correct”, and most backends interpret this as “empty string”, and this breaks traditional mode in quite a bad way (as per the forum thread), I’m marking this to block 1.6 so it can be reverted back to the old behaviour.

[dmethvin]

#8687 is a duplicate of this ticket.

[john]

Fix for this has been backed out - not something that we're going to try and fix.

[addyosmani]

#8902 is a duplicate of this ticket.

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eu nao entendo nada sera que akguem do jquery poderia ajudar e ao enves de faser otras linguas que ninguem usa por favor traduzam em portugues isso assim muito mais pessoas poderao visualizar e usar mais este site e tenha certeza que eu teria prazer em divulgar

[dmethvin]

#9360 is a duplicate of this ticket.

[dmethvin]

#10292 is a duplicate of this ticket.

[dmethvin]

#13611 is a duplicate of this ticket.