kumarachi wrote:
> hi, David:
>
>
> The results for what i tried for what seemed like the right
> expressions to use were generally that the expression keeps evaluating
> to 'null':
>
> scripts/{{.label}}/{{value}}
>
> shows up in my rendered page as:
>
> scripts/null/DataSheet.doc, for example.
>
Oh I see. That can be tricky since you have several items sharing the
same .doc.
If each .doc belongs to only one item, then you could have used this
expression
scripts/{{!scriptURI.label}}/{{value}}
The !scriptURI part retrieves the item given a .doc. But since that's
not the case--a .doc can belong to several items, then I'd try the
following approach. First, extend Exhibit by defining a new control
construct called "with" that you can used to define a variable, and a
function called "last-segment":
<script>
Exhibit.Controls["with"] = {
f: function(
args,
roots,
rootValueTypes,
defaultRootName,
database
) {
var valueCollection = args[0].evaluate(roots,
rootValueTypes, defaultRootName, database);
var nameCollection = args[1].evaluate(roots,
rootValueTypes, defaultRootName, database);
var name = null;
nameCollection.forEachValue(function(v) {
if (v) {
name = v;
return true;
}
});
var oldValue = null
var oldValueType = null
if (name in roots) {
oldValue = roots[name];
oldValueType = rootValueTypes[name];
}
rootValueTypes[name] = valueCollection.valueType;
roots[name] = valueCollection;
var r = args[2].evaluate(roots, rootValueTypes,
defaultRootName, database);
if (oldValue != null) {
rootValueTypes[name] = oldValueType;
roots[name] = oldValue;
} else {
delete rootValueTypes[name];
delete roots[name];
}
return r;
}
};
Exhibit.FunctionUtilities.registerSimpleMappingFunction("last-segment",
function(v) {
var slash = v.lastIndexOf("/");
return v.substr(slash + 1);
}, "text");
</script>
Then your ul can be
<ul ex:content="with(value, 'parent', foreach(.scriptURI,
concat('script/', parent, '/', value)))">
<li><a ex:href-content="value"
ex:content="last-segment(value)"></a></li>
</ul>
Let me know if that works. It's somewhat of a hack but the right
solution would require deeper changes to Exhibit.
David
> It seems I am not using the correct expression for getting the label
> into my path.
>
> Here is the code - this is a section that is part of a Lens view:
>
> <div ex:role="exhibit-viewPanel" style="padding: 6px; color:white;"
> ex:viewClass="Exhibit.TabularView">
> ....
> ...
> <div ex:role="exhibit-lens" ex:formats="date
> { mode: short; show: date }" class="item" style="display:
> none;overflow:visible;width:100%">
> ....
>
> <div
> id="scriptsList" class="scriptsList">
> <p
> class="section-title">Scripts:</p>
> <ul
> ex:content=".scriptURI" id="scriptsList">
> <li><a
> ex:href-subcontent="scripts/{{.label}}/{{value}}"
> ex:content="value" class="lens-link"></a></li>
>
> <!--other variations I tried: -->
>
> <!-- li><a ex:href-subcontent="scripts/',.label,{{value}}"
> ex:content="value" class="lens-link"></a></li -->
>
> <!-- li><a ex:href-content="concat('scripts/',#{{.label}},value)"
> ex:content="value" class="lens-link"></a></li -->
> <!--
> li><a ex:href-content="concat('scripts/',.label,value)"
> ex:content="value" class="lens-link"></a></li -->
>
>
> </ul>
> </div>
>
> ...
> </div>
> ....
> </div >
>
>
> And this is the data:
> {
> "items" : [
> {
> "type" : "Item",
> "label" : "PUMA",
> "scriptURI" : [
> "DataSheet.doc",
> "KnownIssues.doc",
> "Demo script.doc",
> "Manifest.doc"
> ],
> "release-date" : "2009-04-20T00:00:00-04:00"
> },
> {
> "type" : "Item",
> "label" : "COUGAR",
> "scriptURI" : [
> "FlowDiagram.doc",
> "KnownIssues.doc",
> "Architecture.doc",
> "CaseStudy.doc"
> ],
> "release-date" : "2009-04-20T00:00:00-04:00"
> },
>
> [etc....]
>
> ]
>
>
> So that in the end, i'd like the lens to render this for each item,
> dynamically:
>
> /scripts/PUMA/DataSheet.doc
> /scripts/PUMA/KnownIssues.doc
> /scripts/PUMA/Manifest.doc;
>
> and for label=COUGAR:
> /scripts/COUGAR/CaseStudy.doc
> /scripts/COUGAR/FlowDiagram.doc
>
> etc.
>
>
>
>
>
>
> John:
>
> the problem is that I dont know these label name values beforehand,
> even if I wanted to hardcode them in the function you provided.
>
>
> The URL to this exhibit is internal to my company, so I am sorry I
> cannot share that.
>
> I hope this is sufficient info, sorry I was unclear.
>
>
> best,
> -k
>
>
>
> On May 28, 7:40 am, David Huynh <[email protected]> wrote:
>
>> Your mistakes can be somewhere else other than the code snippets that
>> you're showing us here. Could you either give a URL to your exhibit or
>> provide much more code so that it's easier for us to try to think what
>> might have gone wrong? Also, for whatever that you tried, what were the
>> results? Did everything break? Or did the links just not get formatted
>> correctly?...
>>
>> David
>>
>> kumarachi wrote:
>>
>>> Hi,
>>>
>>> now I need a little more help on this...hope there's a solution.
>>>
>>> the Path to the object I need to link to is actually categorized
>>> according to the label.
>>>
>>> so instead of
>>>
>>> ex:href-subcontent="../scripts/{{value}}"
>>>
>>> I need to be able to link to content that is in different folders,
>>>
>>> scripts/<some-name>/{{value}},
>>>
>>> where <some-name> changes according to the label on that item.
>>>
>>> I have, with my limited understanding of expressions in Exhibit, tried
>>> various things like:
>>> scripts/{{label}}/{{value}}, scripts/{{.label}}/{{value}} and other
>>> variations - all in vain.
>>>
>>> Can you help me?
>>>
>>> thanks
>>> -k
>>>
>>> On May 18, 6:58 pm, kumarachi <[email protected]> wrote:
>>>
>>>> oh my god :-).
>>>> perfect, David, thanks so much - works exactly as I need it.
>>>> 1 mins after 3 days of trying variations without fully understanding
>>>> what I was trying...
>>>>
>>>> thank you!!.
>>>>
>>>> On May 18, 6:32 pm, David Huynh <[email protected]> wrote:
>>>>
>>>>> kumarachi wrote:
>>>>>
>>>>>> Hello,
>>>>>>
>>>>>> Could someone help me please.
>>>>>> I am having some trouble creating links from an array in my JSON data.
>>>>>>
>>>>>> I have this snippet from my data.js:
>>>>>> "scriptURI" : [
>>>>>> "walkthrough.doc",
>>>>>> "overview.doc",
>>>>>> "datasheet.docx"
>>>>>> ],
>>>>>>
>>>>>> And in my exhibit file, I want to be able to show these items as href
>>>>>> links in an Unordered List inside a Lens like this:
>>>>>> <ul>
>>>>>> <li><a href="../scripts/walkthrough.doc">walkthrough</a></li>
>>>>>> <li><a href="../scripts/walkthrough.doc">overview</a></li>
>>>>>> <li><a href="../scripts/walkthrough.doc">datasheet</a></li>
>>>>>> </ul>
>>>>>>
>>>>>> I am sure this has been done many times elsewhere...
>>>>>>
>>>>>> I am looking through the various examples for examples of iteration on
>>>>>> such fairly simple data - and attempted to use the foreach function,
>>>>>> but somehow cant get this working. I dont quite understand what the
>>>>>> correct syntax is...and I am not even sure if using foreach is the
>>>>>> right approach.
>>>>>>
>>>>>> I seem to get them all concatenated together, or in other variations,
>>>>>> I receive an error about G[1] undefined...What should the second
>>>>>> parameter here be?
>>>>>>
>>>>>> <ul>
>>>>>> <li><span ex:content="foreach(.scriptURI,???)"></span></li>
>>>>>> </ul>
>>>>>>
>>>>>> Can anyone help me?
>>>>>>
>>>>> Kumar,
>>>>>
>>>>> Try
>>>>>
>>>>> <ul ex:content=".scriptURI">
>>>>> <li><a ex:href-subcontent="../scripts/{{value}}"
>>>>> ex:content="value"></a></li>
>>>>> </ul>
>>>>>
>>>>> Elements inside an element with ex:content are used as a template for
>>>>> rendering each value in the set that the ex:content expression evaluates
>>>>> to.
>>>>>
>>>>> David
>>>>>
> >
>
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