Calculate age in an Equation type question, using Date of Birth

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7 años 3 meses antes #84792 por tfj
Greetings:

Has anyone calculated a person's age in a Equation type question, using the Date of Birth from a previous question?

I have been doing this with a MySQL query, but I would like to move it to LimeSurvey.

I am using 1.92+ build 120808 on a Windows test PC.

Thanks!

tfj

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7 años 3 meses antes #84806 por DenisChenu
Hello,

There a lot of script in web to do this, www.google.com/search?q=javascript+birth+age+calculation

Need little adaptation for LS date.

Denis

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I'm not a LimeSurvey GmbH member, professional service on demand , plugin development .
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7 años 3 meses antes #84820 por tfj
Denis:

Thank you for responding.

Unfortunately for me, before asking my question on the Forum, I had already spent quite a bit of time on Google and a few hours attempting to use the "Implemented Functions" in Expression Manager (from the LimeSurvey documentation) to make this work in an Equation type question. I have found that if I struggle a bit before turning to the Forum, I usually learn things better.

I know I am taking the wrong approach in my efforts, so I am hoping someone who might have already done this could give me the "little adaptation for LS date" that you mentioned. If not, I'll keep at it until I figure it out (or until my deadline, at which point I'll stick with the MySQL query I had already written) and will share it on the Forum.

Thanks again!

tfj

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7 años 3 meses antes #84826 por DenisChenu
Hello,

I don't know if EM can work.

But, with javascript:
First make a date with a date question, if you format is dd-mm-yy then:
Something like that to put the age in QQ:
<script type="text/javascript">
 function AgeFromBirth(birthdate,QQ) {
  aBirthDate=birthdate.split('-');
  if(aBirthDate.length == 3){
   birth = new Date(aBirthDate[2], aBirthDate[1] * 1 - 1, aBirthDate[0]);
   years = Math.floor((now.getTime() - born.getTime()) / (365.25 * 24 * 60 * 60 * 1000));
  }
  $("#question"+QQ+" input.txt").val(years);
  }
$(document).ready(function() {
 AgeFromBirth({INSERTANS:sssXgggXqqq},212);
});
</script>
If date of birth is in the same page, the a
$("#questionQDATEOFBIRTHnumber input.date").blur(function(){AgeFromBirth($(this).val(),212);});
ca do the tric.

And put this function with workarounds help:
docs.limesurvey.org/tiki-index.php?page=..._etc._in_LimeSurvey_

Denis,
PS: there are surely some error in javascript code, i make it directly in the forum
PS2: calculation was taken here: pankajlalwani.wordpress.com/2010/08/02/a...ng-javascriptjquery/

Assistance on LimeSurvey forum and LimeSurvey core development are on my free time.
I'm not a LimeSurvey GmbH member, professional service on demand , plugin development .
An error happen ? Before make a new topic : remind the Debug mode .

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7 años 3 meses antes #84828 por tfj
Denis:

Thank you for taking the time out to help!

I'll work on the example you provided . . . at least I know now that I was going down the wrong path with Expression Manager . . .

Thanks again!

tfj

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7 años 3 meses antes - 7 años 3 meses antes #84831 por Ben_V
In this thread it seems that some LS users did it...
Ben/

Benoît

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Last Releases => 2.6x.x goo.gl/ztWfIV | 2.06/2.6.x => bit.ly/1Qv44A1
Demo Surveys => goo.gl/HuR6Xe (already included in /docs/demosurveys)
Última Edición: 7 años 3 meses antes por Ben_V.

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7 años 3 meses antes #84832 por tfj
benitov:

Thanks for pointing me to this thread. This will also be helpful!

tfj

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7 años 3 meses antes #84833 por Ben_V
I've tried the 2nd code given on the thread using a date question type (with format dd.mm.yyyy) + a short-text question.... (both questions on the same page)
Everything is working fine with LS 1.90 but turned wrong with 1.92...
I don't know why...

Archivo Adjunto:

Nombre del Archivo: limesurvey..._164.lsg
Tamaño del Archivo:8 KB

Benoît

EM Variables => bit.ly/1TKQyNu | EM Roadmap => bit.ly/1UTrOB4
Last Releases => 2.6x.x goo.gl/ztWfIV | 2.06/2.6.x => bit.ly/1Qv44A1
Demo Surveys => goo.gl/HuR6Xe (already included in /docs/demosurveys)
Adjuntos:

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7 años 3 meses antes #84836 por tpartner
Ben, it worked fine for me in 1.92. Maybe your IDs were wrong?

Here it is with more generic selectors to avoid the export-import/ID-change problem. The age value is simply loaded into the first short-text found.

Archivo Adjunto:

Nombre del Archivo: limesurvey...1324.lsg
Tamaño del Archivo:10 KB

Cheers,
Tony Partner

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Official LimeSurvey Partner - partnersurveys.com
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7 años 3 meses antes #84837 por tfj
Thanks, tpartner! I get a "NaN" error in the age text box.

On the off chance that it had something to do with the date format -- since I use "mm-dd-yyyy" -- I changed this setting to "dd-mm-yyyy" for the survey and I still got the "NaN" error. In the meantime, I changed it back to "mm-dd-yyyy."

This is another of those times where I figure I am missing something simple.

tfj

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7 años 3 meses antes #84838 por Ben_V
Thanks Tony...
Tested and working now for me, with all LS versions.
I'm sure that this code will be useful for other people.
Obviously using "more generic selectors" is a great idea !
Ben/

Benoît

EM Variables => bit.ly/1TKQyNu | EM Roadmap => bit.ly/1UTrOB4
Last Releases => 2.6x.x goo.gl/ztWfIV | 2.06/2.6.x => bit.ly/1Qv44A1
Demo Surveys => goo.gl/HuR6Xe (already included in /docs/demosurveys)

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7 años 3 meses antes #84839 por tpartner
tfj, I've modified for date format mm-dd-yyyy and tweaked the logic a bit in this code and attached survey.
<script>
 
	$(document).ready(function(){
 
		$('.date input.popupdate').change(function() {
			// Format: mm-dd-yyyy 
 
			var dob= $('.date input.popupdate').val();
 
			var dobParts = dob.split("-");
 
			dob = dobParts[0] + '/' + dobParts[1] + '/' + dobParts[2];
			var dobDate= new Date(dob);
			var birth_year = dobDate.getYear();
			var birth_month =dobDate.getMonth(); 
			var birth_day =dobDate.getDate(); 
			//alert ("you set the dob (mm-dd-yyyy) to: "+(dobDate.getMonth()+1)+"-"+dobDate.getDate()+"-"+dobDate.getFullYear());
			var today_date = new Date();
			var today_year = today_date.getYear();
			var today_month = today_date.getMonth();
			var today_day = today_date.getDate();
			var age = (today_year) - birth_year;
			if ( today_month < birth_month) {
				age--;
			}
			else if ((birth_month == today_month) && (today_day < birth_day)) {
				age--;
			}
 
			$('.text-short:eq(0) input.text').val(age);
 
		});
 
	});
</script>

Archivo Adjunto:

Nombre del Archivo: limesurvey...6765.lss
Tamaño del Archivo:23 KB

Cheers,
Tony Partner

Solutions, code and workarounds presented in these forums are given without any warranty, implied or otherwise.
Official LimeSurvey Partner - partnersurveys.com
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7 años 3 meses antes #84840 por tfj
Denis, benitov, tpartner:

Many thanks to each of you! My limited knowledge of javascript and upcoming deadlines make for a lethal combination! I am very thankful for this forum and your help!

tfj

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7 años 3 meses antes #84841 por tpartner
You're welcome, I'm glad we could help.

Cheers,
Tony Partner

Solutions, code and workarounds presented in these forums are given without any warranty, implied or otherwise.
Official LimeSurvey Partner - partnersurveys.com

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7 años 3 meses antes #84933 por tfj
We have been testing this solution and have found something strange when using Internet Explorer 8. When calculating the age for a person with a Date of Birth prior to 2000, the answer for age puts a "19" in front of the actual age. For instance, if we put "June 10, 1985" for the date of birth, we get 1927" instead of "27."

In Firefox, this works perfectly.

I figure it must have something to do with a setting within Internet Explorer, and not a problem with the code. If so, we may not be able to use the solution since there are so many users in the field.

Any thoughts?

Thanks!

tfj

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