24 Mar
2014
24 Mar
'14
5:49 p.m.
I am trying to use Velocity to dynamically create the output for my form. If
a field doesn't have any value, then I want the code to not display. So I
came up with the following:
#if ($doc.getValue('processOverview')!='')
= PROCESS OVERVIEW =
<div style="padding-left: 25px;">
$doc.display('processOverview')
</div>
#end
However, this is not working. Velocity is ALWAYS finding something in the
field even though when I go to edit it, there is nothing there. Am I
missing something?
As a work around, I have tried to find a Trim function in velocity and also
a Lenth function. I haven't been able to find either of those. Anyone have
any suggestions?
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24 Mar
24 Mar
5:59 p.m.
Hello,
You could do:
#if ( "$!doc.getValue('processOverview')" != "" )
You can call methods of a Java String from Velocity (if it's a String of
course):
${propValue.trim()}
${propValue.length()}
BR,
Jeremie
2014-03-24 17:49 GMT+01:00 DeHaynes <ew1560(a)wayne.edu>du>:
I am trying to use Velocity to dynamically create the
output for my form.
If
a field doesn't have any value, then I want the code to not display. So I
came up with the following:
#if ($doc.getValue('processOverview')!='')
= PROCESS OVERVIEW =
<div style="padding-left: 25px;">
$doc.display('processOverview')
</div>
#end
However, this is not working. Velocity is ALWAYS finding something in the
field even though when I go to edit it, there is nothing there. Am I
missing something?
As a work around, I have tried to find a Trim function in velocity and also
a Lenth function. I haven't been able to find either of those. Anyone
have
any suggestions?
--
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http://xwiki.475771.n2.nabble.com/Detect-Empty-Fields-tp7589773.html
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6:15 p.m.
That Length formula doesn't work.
I put the following code in the top of my page.
ProcessOverview Value = "$doc.getValue('processOverview')"
ProcessOverview Length = $doc.getValue('processOverview').length()
I then put a value of "a" in the processOverview textArea and saved it. The
result is below:
<http://xwiki.475771.n2.nabble.com/file/n7589776/ProcessOverview_With_Value.png>
I then emptied the processOverview textArea of anything and saved it. The
result is below:
<http://xwiki.475771.n2.nabble.com/file/n7589776/LengthStill1.png>
I was wondering if the system is inserting a carriage return or something in
the empty field. So I looked at the HTML code and it only has a <p> node
above the empty text node.
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6:23 p.m.
The length seems ok : from your screenshot, it seems in second case your
string contains a blank space " " and not an empty string.
So you could first trim() it then compute length() (though I admit I don't
know from were comes the blank space in second case).
2014-03-24 18:15 GMT+01:00 DeHaynes <ew1560(a)wayne.edu>du>:
That Length formula doesn't work.
I put the following code in the top of my page.
ProcessOverview Value = "$doc.getValue('processOverview')"
ProcessOverview Length = $doc.getValue('processOverview').length()
I then put a value of "a" in the processOverview textArea and saved it.
The
result is below:
<
http://xwiki.475771.n2.nabble.com/file/n7589776/ProcessOverview_With_Value.…
I then emptied the processOverview textArea of anything and saved it. The
result is below:
<http://xwiki.475771.n2.nabble.com/file/n7589776/LengthStill1.png>
I was wondering if the system is inserting a carriage return or something
in
the empty field. So I looked at the HTML code and it only has a <p> node
above the empty text node.
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6:28 p.m.
Yea, the following code works. It just seems overly complex to check if a
field is empty.
#if ($doc.getValue('processOverview').trim().length() != 0)
= PROCESS OVERVIEW =
<div style="padding-left: 25px;">
$doc.display('processOverview')
</div>
#end
I think the issue is related to the fact that the field is a textArea and
not a string. I have used simpler checks on string fields and they work
just fine.
Thanks for your help :)
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Jeremie BOUSQUET