xforms:action chains with guranteed order?

Hi,

after some time I'm back in the world of OF and have to make some
changes to my last application.
We consider some problems, that for example, when i delete a singel file
within the database, at least all files of the collection are deleted. I
had no chance to build a reproducable error, but i think the reason
might be, that some of my actions are not proceeded in the right order!?

Is there any chance, that i might add a kind of priority or order to
actions, that must be proceeded in the right order? The only way i see
at the moment is to go through submissions and build a king of workflow
there, but that seems to be a bit of a overkill, to send a submission
for every action and check for "xforms-submission-done" or something
like that. :-(
Any other suggestions how one can solve that problem?

Is it possible to add an xxforms:if to a submission? So it will not be
proceeded, when the if-clause is "false"?

And how about the possibility to call submissions through a xpl? But how
can i replace a normal submission call through an xpl, so that only the
xform:actions are done there and the result can still be used, just like
the result of a submission call?

So, an example case may be a file delete. Before i can call the delete
submission i have to check, if there is set a file id, so that wihtout
the submission won't be called an i can be aware of deleting the whole
collection.
Another example might be the "xforms-ready" event. I have to do a lot of
actions there, but have to make sure, that the very last one is the one,
that sets my "dirty"-trigger to "false". At the moment every i tried
failed and everytime i load some data to my forms it always says, that i
have already made changes to the data, even i have done nothing! And the
"last" xforms:action" under "xforms-ready-event" is <xforms:setvalue
ref="xxforms:instance('control-instance')/data-status" /> so that this
flag should be empty, but it isn't at all.

Any ideas are appreciated. Thanks a lot!
Regards, Marcus


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Marcus,

On Tue, Jul 15, 2008 at 8:25 AM, Marcus <[hidden email]> wrote:
> Is there any chance, that i might add a kind of priority or order to
> actions, that must be proceeded in the right order? The only way i see at
> the moment is to go through submissions and build a king of workflow there,
> but that seems to be a bit of a overkill, to send a submission for every
> action and check for "xforms-submission-done" or something like that. :-(
> Any other suggestions how one can solve that problem?

Actions are executed in the order you write them. Do you have a case
where you execute a number of submissions in sequence? If those are
submission replace="instance", you can just run them in sequence with
<xforms:send>. Maybe I don't fully understand the issue you are
describing.

> Is it possible to add an xxforms:if to a submission? So it will not be
> proceeded, when the if-clause is "false"?

No, you can only have an "if" on actions.

> And how about the possibility to call submissions through a xpl? But how can
> i replace a normal submission call through an xpl, so that only the
> xform:actions are done there and the result can still be used, just like the
> result of a submission call?

You can use the oxf:xforms-submission processor to run an XForms
submission from XPL. You can call an XPL in XForms with
xxforms:call-xpl().

> So, an example case may be a file delete. Before i can call the delete
> submission i have to check, if there is set a file id, so that wihtout the
> submission won't be called an i can be aware of deleting the whole
> collection.

I think something like <xforms:send if="file id set"
submission="delete-file"/> should do the trick. I hope this helps,

Alex
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