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  1. Moodle
  2. MDL-27323

Quiz Restore break on special symbols

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Details

    • Bug
    • Status: Closed
    • Critical
    • Resolution: Cannot Reproduce
    • 2.0.2
    • None
    • Backup, Quiz
    • MySQL
    • MOODLE_20_STABLE
    • Hide

      1) Create a course, add quiz.
      2) Add questions having special symbols / html as answer.
      3) Backup course
      4) Restore course as a new course

      Show
      1) Create a course, add quiz. 2) Add questions having special symbols / html as answer. 3) Backup course 4) Restore course as a new course

    Description

      We are unable to restore course backups. Backup fails with error_question_answers_missing_in_db or error_question_match_sub_missing_in_db.

      We tested restoring course in new installation and it worked but restore fails on production site.

      On further investigation it was found that during restore operation db select queries like[1] remove special symbols like '&' from query which results in empty results.

      We also checked restored course in new installation. All questions/answers had removed special symbols. For e.g. 'Both A & B' was converted into 'Both A B'.

      Another major problem is that restore operation is reconverting html into html. It means that all html code ( for e.g. <P> Tag) is now displayed to user in browser.

      [1] SELECT id FROM

      {question_answers}

      WHERE question = ? AND answer = ?

      Attachments

        Issue Links

          has been marked as being related by

          Bug - A problem which impairs or prevents Moodle from functioning correctly. MDL-36683 impossible to duplicate a quiz when Course question bank contains matching questions

          • Blocker - Blocks development and/or testing, prevents Moodle from running (applicable to bugs only)
          • Closed

          Activity

            People

              fred Frédéric Massart
              modguru Jai Gupta
              Votes:
              5 Vote for this issue
              Watchers:
              7 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved: