You should be able to monkey-patch just this function, rather than all
of tapestry.js.

On Fri, Oct 15, 2010 at 1:59 AM, Blower, Andy
<andy.blo...@proquest.co.uk> wrote:
> Raised TAP5-1309. I will override & patch tapestry.js to T5.2.0 version of 
> this line of code.
>
>> -----Original Message-----
>> From: Howard Lewis Ship [mailto:hls...@gmail.com]
>> Sent: 14 October 2010 22:39
>> To: Tapestry users
>> Subject: Re: [T5.2.1] TAP5-1177 In a partial page update request, if
>> the server returns an empty string for the content, the client-side is
>> left as is, rather than cleared
>>
>> I think you've found a bug ... I think Tapestry should not set the
>> content property of the response when there's a MultiZoneUpdate
>> response, so as to leave the Zone's current content unchanged.  Please
>> add to JIRA and I'll see about fixing it soon.
>>
>> On Thu, Oct 14, 2010 at 12:12 PM, Blower, Andy
>> <andy.blo...@proquest.co.uk> wrote:
>> > I've spent all day chasing down an issue that appeared when we
>> upgraded to Tapestry 5.2.1 - it doesn't occur with T5.2.0, and I
>> finally managed to find the change that is causing the problem. It's
>> the fix for TAP5-1177 where tapestry.js was changed from
>>
>> >
>> >                                Tapestry.loadScriptsInReply(reply,
>> function() {
>> >                                                /*
>> >                                                 * In a multi-zone
>> update, the reply.content may be blank or
>> >                                                 * missing.
>> >                                                 */
>> >                                                reply.content &&
>> this.show(reply.content);
>> > to
>> >                                Tapestry.loadScriptsInReply(reply,
>> function() {
>> >                                                /*
>> >                                                 * In a multi-zone
>> update, the reply.content may be missing,
>> >                                                 * in which case,
>> leave the curent content in place. TAP5-1177
>> >                                                 */
>> >                                                reply.content !=
>> undefined && this.show(reply.content);
>> >
>> >
>> > The situation this is causing an issue for is where we have a form in
>> a zone and submitting the form needs to update another zone so
>> MultiZoneUpdate is used which has content in the json for the other
>> zone. i.e.
>> >
>> > {
>> >  "content" : "",
>> >  "zones" : {
>> >    "someThingZone" : "<b>stuff</b>"
>> >  }
>> > }
>> >
>> > This used to leave the form inside it's zone alone which is good
>> because some other javascript fires which accesses part of the form. If
>> the form has been removed from the DOM (as happens with T5.2.1) then
>> this Javascript fails. I'm not very familiar with this code, and I've
>> not personally used MultiZoneUpdate, but it seems to me at first glance
>> that the content bit of the json will always be "" for MultiZoneUpdate.
>> All the content goes into the "zones" part of the json. Also, the
>> comment in the T5.2.1 version seems to say that the content should be
>> left alone if content is missing, but since missing is the same as ""
>> it doesn't do that.
>> >
>> > Howard, what's your opinion? Can content ever be set to something, or
>> left undefined? I can't see how using MultiZoneUpdate. This is
>> affecting some pretty major functionality and we have a release in a
>> couple of weeks, so I need to find a solution to this problem pretty
>> swiftly. I will see if I can modify our javascript code to work around
>> this without breaking anything else, but I'm not that hopeful.
>> >
>> >
>> > Cheers,
>> >
>> > Andy.
>> >
>> > P.S. I found some other issues with the JS stacks, but that's not
>> breaking anything - just may not be what you'd expect. I'll detail
>> those in another email when I get the time.
>> >
>>
>>
>>
>> --
>> Howard M. Lewis Ship
>>
>> Creator of Apache Tapestry
>>
>> The source for Tapestry training, mentoring and support. Contact me to
>> learn how I can get you up and productive in Tapestry fast!
>>
>> (971) 678-5210
>> http://howardlewisship.com
>>
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-- 
Howard M. Lewis Ship

Creator of Apache Tapestry

The source for Tapestry training, mentoring and support. Contact me to
learn how I can get you up and productive in Tapestry fast!

(971) 678-5210
http://howardlewisship.com

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