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[Mahara Bot <1515929@xxxxxxxxxxxxxxxxxx>]

Patch for "15.10_STABLE" branch: https://reviews.mahara.org/5788

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https://bugs.launchpad.net/bugs/1515929

Title:
  Duplicate records in usr_custom_layout cause fatal crash when copying
  a collection

Status in Mahara:
  Fix Committed
Status in Mahara 15.10 series:
  In Progress
Status in Mahara 16.04 series:
  Fix Committed

Bug description:
  When creating a collection by copying a previous collection we are
  getting an error of:

  Site unavailable
  A nonrecoverable error occurred. This probably means you have encountered a bug in the system

  PHP is reporting the following error and we are on the latest version
  of Mahara to date 15.10.0:

  2015/11/13 09:02:51 [error] 1077#0: *7505 FastCGI sent in stderr: "PHP message: [WAR] 0a (lib/errors.php:747) get_record_sql found more than one row. If you meant to retrieve more than one record, use get_records_*, otherwise check your code or database for inconsistencies
  PHP message: Call stack (most recent first):
  PHP message:   * log_message("get_record_sql found more than one row. If you mea...", 8, true, true) at /scratch/var/mahara/htdocs/lib/errors.php:97
  PHP message:   * log_warn("get_record_sql found more than one row. If you mea...") at /scratch/var/mahara/htdocs/lib/errors.php:747
  PHP message:   * SQLException->__construct("get_record_sql found more than one row. If you mea...") at /scratch/var/mahara/htdocs/lib/dml.php:328
  PHP message:   * get_record_sql("SELECT * FROM "usr_custom_layout"  WHERE "layout" ...", array(size 2)) at /scratch/var/mahara/htdocs/lib/dml.php:291
  PHP message:   * get_record("usr_custom_layout", "layout", "203", "usr", "1770") at /scratch/var/mahara/htdocs/lib/view.php:428
  PHP message:   * View::create_from_template(array(size 5), "40765", "1770", true, false) at /scratch/var/mahara/htdocs/lib/collection.php:292
  PHP message:   * Collection::create_from_template(array(size 6), 4307) at /scratch/var/mahara/htdocs/lib/view.php:6376
  PHP message:   * createview_submit(object(Pieform), array(size 7)) at Unknown:0
  PHP message:   * call_user_func_array("createview_submit", array(size 2)) at /scratch/var/mahara/htdocs/lib/pieforms/pieform.php:537
  PHP message:   * Pieform->__construct(array(size 8)) at /scratch/var/mahara/htdocs/lib/pieforms/pieform.php:164
  PHP message:   * Pieform::process(array(size 8)) at /scratch/var/mahara/htdocs/lib/pieforms/pieform.php:71
  PHP message:   * pieform(array(size 8)) at /scratch/var/mahara/htdocs/view/choosetemplate.php:27
  PHP message:
  PHP message: [WAR] 0a (lib/dml.php:327) get_record_sql found more than one row. If you meant to retrieve more than one record, use get_records_*, otherwise check your code or database for inconsistencies
  PHP message: Ca

  Cheers,
  Ed

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