Accessing data updated by another Model in XForms

Hello,

I have an xform having two models. The two models open the file, one of them in read/write and the other in read only. Then when data is updated, the 'autosave-shared-data' event is dispatched to submit the update and this submits successfully. But when I output the data, it still displays the previous data. How can I read the recent update in the other model's group?

<xf:action ev:event="DOMActivate">                       
                                                                               
        <xf:setvalue ref="instance('main-dataset-shared-data-instance')/fas-ps:position" value="index('activity-list')"/>
                                                                               
        <xf:dispatch name="autosave-shared-data" target="main-model"/>                               
                                                                               
        <xf:output value="concat('Data Position No: ', instance('main-dataset-shared-data-instance')/fas-ps:position)" />       
                                                                               
        <xf:group model="metadata-model" ref="/*/*[position() = instance('metadata-shared-data-instance')/fas-ps:position]">
                                                                                       
        <xf:output value="concat('Meta Position No: ', instance('metadata-shared-data-instance')/fas-ps:position)" />       
        </xf:group>
        <xf:rebuild model="main-model"/>
</xf:action>

I am not sure I understand 100%. Can you provide more details?

In passing, I see in your code some xf:output and xf:group within XForms
actions. Placing XForms controls within actions won't do anything at all.

-Erik

On Wed, Jul 27, 2011 at 11:43 AM, ibrahuma <[hidden email]> wrote:

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Thanks, for your response. The output controls are just for debugging output. Here is what I am trying to do:

I need to share a variable between two models, for tracking current activitiy's index in a multiple activities document. The two models represent two separate, but identical documents, one for keeping data (main-model) and the other for the corresponding timestamp (metadata-model). There is a third document for saving the shared position variable. I have an instance for this document in each of the two models. This file is modified only by a control bound to the main model. When this control is triggered, the value of the shared position is modified and saved (through submission) to the third document. As a result, the corresponding instance in the main-model reads the updated value, but the instance in the metadata-model still reads the initial value and couldn't read  the updated value. How can I reload the instance in the metadata-model to read the updated value?

In general terms, is it possible to access recent data in a given model, where the data update is done through another model?

Thanks, for your assistance.

Cross-model interactions can be tricky.

It seems that in your case you need to use events. For example,
reacting to xforms-submission-done in one model to dispatch a custom
event to the second model. The second model can then react to that
custom event.

The function xxforms:instance('instance-id') can be useful here to
access instances globally. That is, a model can then access instances
from another model.

You can also pass context information to events with <xxforms:context>:

http://wiki.orbeon.com/forms/doc/developer-guide/xforms-events#TOC-Enhanced-xforms:dispatch-support

This allows you to pass information from one model to another via events.

-Erik

On Thu, Jul 28, 2011 at 8:04 PM, ibrahuma <[hidden email]> wrote:

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