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Accessing SURequest / SUAjax post parameters

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Edward Stow

Accessing SURequest / SUAjax post parameters

Hi

I am constructing custom SURequest object -- and need to access the
post parameters during callback.
How would you accesss the testParam callback parameter values.

Ideally with something like:

renderSaveRequestOn: html

html anchor
onClick: (html request
callback: [ self updateModel: self testParamValue];
addParameter: 'testParam' -> 'abc');
with: 'SURequest example'

What would #testParamValue need to implement?

Thanks
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Edward Stow
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Lukas Renggli

Re: Accessing SURequest / SUAjax post parameters

> How would you accesss the testParam callback parameter values.

This is not how Seaside works.

Try this:

> html anchor
> onClick: (html request
> callback: [ self updateModel: testParamValue ];
> callback: [ :value | testParamValue := value ] value: 'abc');
> with: 'SURequest example'

Lukas

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Lukas Renggli
http://www.lukas-renggli.ch
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Edward Stow

Re: Accessing SURequest / SUAjax post parameters

On Tue, Apr 15, 2008 at 8:57 AM, Lukas Renggli <[hidden email]> wrote:

>
> Try this:
>
>
> > html anchor
> > onClick: (html request
> > callback: [ self updateModel: testParamValue ];
> > callback: [ :value | testParamValue := value ] value: 'abc');
> > with: 'SURequest example'
>

I think a little more explanation of my scenario is needed: I have a
client side javascript application -- a google maps mashup with a
number of overlays, that is manipulated entirely within the browser.
The browser model can be serialized in json format with a function
call eg:

myModel.toJson() -- so what I want to end up with is a callback that
returns the json data to my Seaside component.

The basic questions is how to construct a the requests so to call some
function eg toJson() in the browser and return the string generated by
the function.

Thanks
--

Edward Stow
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Edward Stow

Re: Accessing SURequest / SUAjax post parameters

On Tue, Apr 15, 2008 at 9:25 AM, Edward Stow <[hidden email]> wrote:

> On Tue, Apr 15, 2008 at 8:57 AM, Lukas Renggli <[hidden email]> wrote:
>
> >
> > Try this:
> >
> >
> > > html anchor
> > > onClick: (html request
> > > callback: [ self updateModel: testParamValue ];
> > > callback: [ :value | testParamValue := value ] value: 'abc');
> > > with: 'SURequest example'
> >
>
> I think a little more explanation of my scenario is needed: I have a
> client side javascript application -- a google maps mashup with a
> number of overlays, that is manipulated entirely within the browser.
> The browser model can be serialized in json format with a function
> call eg:
>
> myModel.toJson() -- so what I want to end up with is a callback that
> returns the json data to my Seaside component.
>
> The basic questions is how to construct a the requests so to call some
> function eg toJson() in the browser and return the string generated by
> the function.

I have been hacking around (in the pejorative sense) with
WACallbackStream -- this works but is clearly not at all elegant.

MyComponent>>processCallbackStream: aCallbackStream
aCallbackStream request fields
at: 'testParam' ifPresent: [:testParam | self updateModel: testParam ].
super processCallbackStream: aCallbackStream

And in
WACallbackStream>>request
^request

--

Edward Stow
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Lukas Renggli

Re: Accessing SURequest / SUAjax post parameters

In reply to this post by Edward Stow

> > > html anchor
> > > onClick: (html request
> > > callback: [ self updateModel: testParamValue ];
> > > callback: [ :value | testParamValue := value ] value: 'abc');
> > > with: 'SURequest example'

Why doesn't this code work?

I only notice now that you are using a #request, so you can even make
it simpler:

html request callback: [ :value | self updateModel: value ] value: 'abc'

> myModel.toJson() -- so what I want to end up with is a callback that
> returns the json data to my Seaside component.

The #callback:value:'s first argument is the callback block with the
value, the second argument is the JSON data (in this case a string)
that is serialized on the browser side and brought to the server side.
See the method comment for details.

Lukas renggli

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Lukas Renggli
http://www.lukas-renggli.ch
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Edward Stow

Re: Accessing SURequest / SUAjax post parameters

On Tue, Apr 15, 2008 at 3:58 PM, Lukas Renggli <[hidden email]> wrote:

> > > > html anchor
> > > > onClick: (html request
> > > > callback: [ self updateModel: testParamValue ];
> > > > callback: [ :value | testParamValue := value ] value: 'abc');
> > > > with: 'SURequest example'
>
> Why doesn't this code work?
>
> I only notice now that you are using a #request, so you can even make
> it simpler:
>
> html request callback: [ :value | self updateModel: value ] value: 'abc'
>
>
> > myModel.toJson() -- so what I want to end up with is a callback that
> > returns the json data to my Seaside component.
>
> The #callback:value:'s first argument is the callback block with the
> value, the second argument is the JSON data (in this case a string)
> that is serialized on the browser side and brought to the server side.
> See the method comment for details.

I read the comment (copied below) and was a little confused:

SUAjax>>callback: aBlock value: anObject
"Register aBlock as a secondary callback. anObject is interpreted as
JavaScript on the client-side, the result will be sent back to the
server and passed into aBlock. Multiple secondary callbacks can be
defined with one receiver."

I took this to (incorrectly) mean that anObject is serialized to a
json format, and is included as a string in the post parameters. This
does work:

str := SUStream new nextPutAll: 'myMap.toJson()'.

html anchor
onClick: (html request
callback: [ :value | self updateModel: value ] value: str );
with: 'SURequest example'

So my final question is do you need the primary callback at all?

Thanks
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Edward Stow
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Lukas Renggli

Re: Accessing SURequest / SUAjax post parameters

> So my final question is do you need the primary callback at all?

Not in your case, I suppose.

Lukas

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Lukas Renggli
http://www.lukas-renggli.ch
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