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Random Media Loading
- darty
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6 years 9 months ago #155547
by darty
Random Media Loading was created by darty
Hi!
I have a dataset of media files (> 2000 files), each with their own ID and metadata. I'd like to conduct a study where every user answers questions about 10 random media files.
My current idea is to have each question retrieve a random ID from an external server and link that ID to the current question group. So every question retrieves a URL from a fixed address, then parses the ID and the media URL from the response, completes the ID into a hidden field and includes the media file in the webpage.
I'm not sure if this is the correct way to proceed with this, and I was wondering if someone could point me in the right direction to achieve this.
Thank you!
I have a dataset of media files (> 2000 files), each with their own ID and metadata. I'd like to conduct a study where every user answers questions about 10 random media files.
My current idea is to have each question retrieve a random ID from an external server and link that ID to the current question group. So every question retrieves a URL from a fixed address, then parses the ID and the media URL from the response, completes the ID into a hidden field and includes the media file in the webpage.
I'm not sure if this is the correct way to proceed with this, and I was wondering if someone could point me in the right direction to achieve this.
Thank you!
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- holch
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6 years 9 months ago #155553
by holch
I answer at the LimeSurvey forum in my spare time, I'm not a LimeSurvey GmbH employee.
No support via private message.
Replied by holch on topic Random Media Loading
You could create a random number via Expression Manager (there are many examples here in the forum on how to do that).
You would have to create as many equation questions and save random numbers into them as you will want to show files per user (in your case 10).
Only problem: There is a slight chance that you could get a file more than once per user.
You would have to create as many equation questions and save random numbers into them as you will want to show files per user (in your case 10).
Only problem: There is a slight chance that you could get a file more than once per user.
I answer at the LimeSurvey forum in my spare time, I'm not a LimeSurvey GmbH employee.
No support via private message.
The topic has been locked.
- tpartner
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6 years 9 months ago #155566
by tpartner
Cheers,
Tony Partner
Solutions, code and workarounds presented in these forums are given without any warranty, implied or otherwise.
Replied by tpartner on topic Random Media Loading
You can use JavaScript to load the inputs of a multiple-numeric question and then use those values in your paths to the videos.
This will load a question with 10 random numbers between 1 and 2000:
Sample survey attached:
This will load a question with 10 random numbers between 1 and 2000:
Code:
<script type="text/javascript" charset="utf-8"> $(document).ready(function() { // Identify this question var qID = {QID}; var thisQuestion = $('#question'+qID); // Build an array of 10 random numbers between 1 and 2000 var numbers = []; while(numbers.length < 10){ var randomnumber = Math.ceil(Math.random()*2000) if(numbers.indexOf(randomnumber) > -1) continue; numbers[numbers.length] = randomnumber; } // Load the question $(numbers).each(function(i, value) { $('input[type="text"]:eq('+i+')', thisQuestion).val(value); }); }); </script>
Sample survey attached:
Cheers,
Tony Partner
Solutions, code and workarounds presented in these forums are given without any warranty, implied or otherwise.
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