Copy Nodeset to Variable Binding

[Joel Oates]

Hello!

Not sure how to word what I am doing, so correct me please if I am wrong.
Here is what I am trying to do.

I have a xbl component with a bunch of fields and data, now some of these
fields I want to be populated from a rest call to another service based off
the values entered so far. I have the search and submission working, I get a
list of results back that fit the search criteria. Now I want to way to copy
(lets say the first result) back into the forms model.

<xbl:binding id="workflow-episode-details"
element="workflow|episode-details" xxbl:mode="lhha binding">
...

<xbl:template>
<xf:model id="local-model">
<xf:instance>
<episode-details>
....
</episode-details>
</xf:instance>

<xf:submission id="dmr-test-submission"
resource="http://localhost:8080/episode"
method="post"
ref="instance('episode-search-data')"
serialization="application/xml"
mediatype="application/xml"
replace="instance"
instance="episode-search-results"
xxf:username=""
xxf:password=""/>

<xf:instance id="episode-search-data">
<episode-details/>
</xf:instance>

<xf:instance id="episode-search-results">
<results/>
</xf:instance>
</xf:model>
</xbl:template>

<xf:group id="workflow-component-group" model="local-model">

<xf:var name="binding"
value="xxf:binding('workflow-episode-details')" />

....

<xf:trigger id="episode-search-buttom">
<xf:label>Search</xf:label>
<xf:action ev:event="DOMActivate">
<xf:setvalue
ref="instance('episode-search-data')/episodeId" value="$binding/EpisodeId"/>
<xf:action ev:event="DOMActivate">
<xf:send submission="dmr-test-submission"/>
</xf:action>
<xf:action ev:event="DOMActivate"
if="count-non-empty(instance('episode-search-results')/results) > 0">

<xf:setvalue ref="$binding"
value="instance('episode-search-results')/results[1]"/>
</xf:action>
</xf:action>
</xf:trigger>
</xbl:binding>

Some things to node, The list of results from the submission have an
identically structure to the local-model, I am getting a list of results
back and am currently just trying to copy the first result back into the
binding.


Thanks for your time in reading this and I hope is isn't to hard to read.

Joel.


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[Alessandro Vernet]

Hi Joel,

It looks like the element bound your XBL control doesn't just contain text,
but contains an `<EpisodeId>`. Is it expected to contain just 1 episode id?
If so, I think it will be simpler to have that episode id directly as the
value of the bound node. In that case, after the `<xf:send
submission="dmr-test-submission"/>`, you'll want maybe to do:

<xf:setvalue ref="$binding"
value="instance('episode-search-results')/results[1]/EpisodeId"/>

If `results[1]` contains multiple elements you want to insert, maybe you'll
want do something like:

<xf:delete ref="$binding/*"/>
<xf:insert context="$binding"
origin="instance('episode-search-results')/results[1]/*"/>

Also, you don't need to have 2 `<xf:action ev:event="DOMActivate">`. You can
just have 1, and move the content of the second one into the first one.

You'll let me know if this helps, or if I missed your point.

‑Alex

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[Joel Oates]

Hello Alex,

Thanks for looking into it!

So I was trying to replace a whole structure of type "Episode" which
contains several elements, I took the approach you talked about, I deleted
everything and replaced it with the instance.

<xf:delete ref="$binding/*" />
<xf:insert context="$binding"
origin="instance('episode-search-results')/results[1]/*" />

This worked wonderfully thank you.

I am not sure if I should ask another question for this, but is there a way
off the top of your head to create a way of being able to pick out of the
results that I want to replace the instance with. My Use case is, I have
done a "Search" and a list of results are returned, I want the user to click
the one that they desire to replace the instance.

Thanks Again for the reply.
Cheers,

[Alessandro Vernet]

Hi Joel,


Joel Oates wrote

> This worked wonderfully thank you.

Excellent!


Joel Oates wrote

> I am not sure if I should ask another question for this, but is there a
> way
> off the top of your head to create a way of being able to pick out of the
> results that I want to replace the instance with. My Use case is, I have
> done a "Search" and a list of results are returned, I want the user to
> click
> the one that they desire to replace the instance.

You could maybe populate a dropdown with the results, let users select an
item from the dropdown, and upon selection the `results` element
corresponding to that item would replace what is in the `$binding` (which
you now do when users click on the button). Would something along those
lines make sense?

‑Alex

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