Moodle LTI 1.1 error in user grade update with a "null" grade

Moodle LTI 1.1 error in user grade update with a "null" grade

由Vinodya Bandara發表於
Number of replies: 2

Hello,

We are trying to send an LTI 1.1 grade update request to moodle 3.8(http://3plcgmoodleprd.prd-prsn.com/moodle38/) instance with a null grade value.

Request Body:

<?xml version = "1.0" encoding = "UTF-8"?>
<imsx_POXEnvelopeRequest xmlns = "http://www.imsglobal.org/services/ltiv1p1/xsd/imsoms_v1p0">
  <imsx_POXHeader>
    <imsx_POXRequestHeaderInfo>
      <imsx_version>V1.0</imsx_version>
      <imsx_messageIdentifier>637907331</imsx_messageIdentifier>
    </imsx_POXRequestHeaderInfo>
  </imsx_POXHeader>
  <imsx_POXBody>
    <replaceResultRequest>
      <resultRecord>
        <sourcedGUID>
          <sourcedId>SampleSourceId</sourcedId>
        </sourcedGUID>
        <result>
          <resultScore>
            <language>en-US</language>
            <textString>null</textString>
          </resultScore>
        </result>
      </resultRecord>
    </replaceResultRequest>
</imsx_POXBody>
</imsx_POXEnvelopeRequest>


For the above request, we got the following response error.

<?xml version="1.0" encoding="UTF-8"?>

<imsx_POXEnvelopeResponse xmlns="http://www.imsglobal.org/services/ltiv1p1/xsd/imsoms_v1p0">

<imsx_POXHeader>

<imsx_POXResponseHeaderInfo>

<imsx_version>V1.0</imsx_version>

<imsx_messageIdentifier>1018505128</imsx_messageIdentifier>

<imsx_statusInfo>

<imsx_codeMajor>failure</imsx_codeMajor>

<imsx_severity>status</imsx_severity>

<imsx_description>Score must be numeric</imsx_description>

<imsx_messageRefIdentifier>637907331</imsx_messageRefIdentifier>

<imsx_operationRefIdentifier>replaceResultRequest</imsx_operationRefIdentifier>

</imsx_statusInfo>

</imsx_POXResponseHeaderInfo>

</imsx_POXHeader>

<imsx_POXBody>

<replaceResultResponse/>

</imsx_POXBody>

</imsx_POXEnvelopeResponse>


Can we know whether Moodle does not support a "null" grade update for LTI 1.1 or is there any other method we can follow to send a grade update request with a "null" grade?

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In reply to Vinodya Bandara

Re: Moodle LTI 1.1 error in user grade update with a "null" grade

由Jake Dallimore發表於
Core developers的相片 Moodle HQ的相片 Particularly helpful Moodlers的相片 Peer reviewers的相片 Plugin developers的相片 Testers的相片
Hi Vinodya,

That's right, as per the Basic Outcomes specification (https://www.imsglobal.org/spec/lti-bo/v1p1#basic-outcome-service), "The only type of grade supported by this service is a decimal numeric grade in the range from 0.0 - 1.0". Moodle enforces just that.

Hope that helps.

Cheers,
Jake
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In reply to Jake Dallimore

Re: Moodle LTI 1.1 error in user grade update with a "null" grade

由Vinodya Bandara發表於
Hi Jake,

Thank you so much for the update! It really helps.

Regards,
Vinodya
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