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#11224 closed bug (wontfix)

Opened January 25, 2012 05:18PM UTC

Closed February 04, 2012 04:14PM UTC

$.ajaxSetup data object does not merge when $.ajax call passes a string.

Reported by: Owned by:
Priority: undecided Milestone: None
Component: unfiled Version: 1.7.1
Keywords: Cc:
Blocked by: Blocking:

I'm trying to use $.ajaxSetup to add a default parameter to every ajax request on my page, but it's being made more difficult by this bug combined with some bad code a contractor wrote.

If I make any ajax calls using jquery, and I define my parameters as a urlencoded string instead of a javascript object, they will ignore the defaults set by $.ajaxSetup. consider the following example code:


$.ajaxSetup({'data': {'secret': 'token'}});

$.get("/echo/json/", "param=stuff");

$.get("/echo/json/", {"param": "stuff"});


The first .get call requests /echo/json/?param=stuff whereas the second requests /echo/json/?param=stuff&secret=token.

Would be kind of nice if this would parse the query stringified version into an object, then do the merge.

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Change History (3)

Changed January 25, 2012 07:37PM UTC by comment:1

I added the following hack to my local copy of jQuery. (started with version 1.4.2, line 4982.)

		// convert data if not already a string
		if ( && s.processData && typeof !== "string" ) { = jQuery.param(, s.traditional );

		// HACK HACK HACK to support case where params were passed as a string.
		else if ( && typeof( === "string" && jQuery.ajaxSettings &&{ += "&" + jQuery.param(, s.traditional );

this works in my use case, but probably breaks others.

Changed February 04, 2012 03:12PM UTC by dmethvin comment:2

status: newopen

I am not sure whether this is a case we should handle, but if not we should document it.

Changed February 04, 2012 04:14PM UTC by jaubourg comment:3

resolution: → wontfix
status: openclosed

We definitely shouldn't handle this. Cost is prohibitive. Don't encode your parameters OR deserialize them before giving them to $.ajax.