Ok, this should actually fix #6041 :)

diff --git a/src/ajax.js b/src/ajax.js
index f514cae..3c19ad6 100644 (file)
--- a/src/ajax.js
+++ b/src/ajax.js
@@ -624,7 +624,7 @@ jQuery.extend({
                        // If traditional, encode the "old" way (the way 1.3.2 or older
                        // did it), otherwise encode params recursively.
                        for ( var prefix in a ) {
-                               buildParams( traditional ? prefix : prefix.replace(/[\[\]]/g, ""), a[prefix] );
+                               buildParams( prefix, a[prefix] );
                        }
                }
 
@@ -635,7 +635,7 @@ jQuery.extend({
                        if ( jQuery.isArray(obj) ) {
                                // Serialize array item.
                                jQuery.each( obj, function( i, v ) {
-                                       if ( traditional ) {
+                                       if ( traditional || /\[\]$/.test( prefix ) ) {
                                                // Treat each array item as a scalar.
                                                add( prefix, v );
                                        } else {

diff --git a/test/unit/ajax.js b/test/unit/ajax.js
index 4a823ac..0464c7b 100644 (file)
--- a/test/unit/ajax.js
+++ b/test/unit/ajax.js
@@ -379,7 +379,7 @@ test("jQuery.param()", function() {
        params = { a:[1,2], b:{ c:3, d:[4,5], e:{ x:[6], y:7, z:[8,9] }, f:true, g:false, h:undefined }, i:[10,11], j:true, k:false, l:[undefined,0], m:"cowboy hat?" };
        equals( jQuery.param(params,true), "a=1&a=2&b=%5Bobject+Object%5D&i=10&i=11&j=true&k=false&l=undefined&l=0&m=cowboy+hat%3F", "huge structure, forced traditional" );
 
-       equals( decodeURIComponent( jQuery.param({ "test[]": [0, 1, 2] }) ), "test[]=0&test[]=1&test[]=2", "Make sure params are double-encoded." );
+       equals( decodeURIComponent( jQuery.param({ a: [1,2,3], 'b[]': [4,5,6], 'c[d]': [7,8,9], e: { f: [10], g: [11,12], h: 13 } }) ), "a[]=1&a[]=2&a[]=3&b[]=4&b[]=5&b[]=6&c[d][]=7&c[d][]=8&c[d][]=9&e[f][]=10&e[g][]=11&e[g][]=12&e[h]=13", "Make sure params are not double-encoded." );
        
        jQuery.ajaxSetup({ traditional: true });