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See Release Notes

  • Bug fixes for general core bugs in 3.11.x will end 14 Nov 2022 (12 months plus 6 months extension).
  • Bug fixes for security issues in 3.11.x will end 13 Nov 2023 (18 months plus 12 months extension).
  • PHP version: minimum PHP 7.3.0 Note: minimum PHP version has increased since Moodle 3.10. PHP 7.4.x is supported too.

Differences Between: [Versions 310 and 311] [Versions 38 and 311] [Versions 39 and 311]

   1  <?php
   2  // This file is part of Moodle - http://moodle.org/
   3  //
   4  // Moodle is free software: you can redistribute it and/or modify
   5  // it under the terms of the GNU General Public License as published by
   6  // the Free Software Foundation, either version 3 of the License, or
   7  // (at your option) any later version.
   8  //
   9  // Moodle is distributed in the hope that it will be useful,
  10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  // GNU General Public License for more details.
  13  //
  14  // You should have received a copy of the GNU General Public License
  15  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16  
  17  /**
  18   * A moodleform allowing the editing of the grade options for an individual grade item
  19   *
  20   * @package   core_grades
  21   * @copyright 2007 Petr Skoda
  22   * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  
  25  if (!defined('MOODLE_INTERNAL')) {
  26      die('Direct access to this script is forbidden.');    ///  It must be included from a Moodle page
  27  }
  28  
  29  require_once $CFG->libdir.'/formslib.php';
  30  
  31  class edit_item_form extends moodleform {
  32      private $displayoptions;
  33  
  34      function definition() {
  35          global $COURSE, $CFG, $DB;
  36  
  37          $mform =& $this->_form;
  38  
  39          $item = $this->_customdata['current'];
  40  
  41  /// visible elements
  42          $mform->addElement('header', 'general', get_string('gradeitem', 'grades'));
  43  
  44          $mform->addElement('text', 'itemname', get_string('itemname', 'grades'));
  45          $mform->setType('itemname', PARAM_TEXT);
  46          $mform->addElement('text', 'iteminfo', get_string('iteminfo', 'grades'));
  47          $mform->addHelpButton('iteminfo', 'iteminfo', 'grades');
  48          $mform->setType('iteminfo', PARAM_TEXT);
  49  
  50          $mform->addElement('text', 'idnumber', get_string('idnumbermod'));
  51          $mform->addHelpButton('idnumber', 'idnumbermod');
  52          $mform->setType('idnumber', PARAM_RAW);
  53  
  54          if (!empty($item->id)) {
  55              $gradeitem = new grade_item(array('id' => $item->id, 'courseid' => $item->courseid));
  56              // If grades exist set a message so the user knows why they can not alter the grade type or scale.
  57              // We could never change the grade type for external items, so only need to show this for manual grade items.
  58              if ($gradeitem->has_grades() && !$gradeitem->is_external_item()) {
  59                  // Set a message so the user knows why they can not alter the grade type or scale.
  60                  if ($gradeitem->gradetype == GRADE_TYPE_SCALE) {
  61                      $gradesexistmsg = get_string('modgradecantchangegradetyporscalemsg', 'grades');
  62                  } else {
  63                      $gradesexistmsg = get_string('modgradecantchangegradetypemsg', 'grades');
  64                  }
  65  
  66                  $gradesexisthtml = '<div class=\'alert\'>' . $gradesexistmsg . '</div>';
  67                  $mform->addElement('static', 'gradesexistmsg', '', $gradesexisthtml);
  68              }
  69          }
  70  
  71          // Manual grade items cannot have grade type GRADE_TYPE_NONE.
  72          $options = array(GRADE_TYPE_VALUE => get_string('typevalue', 'grades'),
  73                           GRADE_TYPE_SCALE => get_string('typescale', 'grades'),
  74                           GRADE_TYPE_TEXT => get_string('typetext', 'grades'));
  75  
  76          $mform->addElement('select', 'gradetype', get_string('gradetype', 'grades'), $options);
  77          $mform->addHelpButton('gradetype', 'gradetype', 'grades');
  78          $mform->setDefault('gradetype', GRADE_TYPE_VALUE);
  79  
  80          //$mform->addElement('text', 'calculation', get_string('calculation', 'grades'));
  81          //$mform->disabledIf('calculation', 'gradetype', 'eq', GRADE_TYPE_TEXT);
  82          //$mform->disabledIf('calculation', 'gradetype', 'eq', GRADE_TYPE_NONE);
  83  
  84          $options = array(0=>get_string('usenoscale', 'grades'));
  85          if ($scales = grade_scale::fetch_all_local($COURSE->id)) {
  86              foreach ($scales as $scale) {
  87                  $options[$scale->id] = $scale->get_name();
  88              }
  89          }
  90          if ($scales = grade_scale::fetch_all_global()) {
  91              foreach ($scales as $scale) {
  92                  $options[$scale->id] = $scale->get_name();
  93              }
  94          }
  95          // ugly BC hack - it was possible to use custom scale from other courses :-(
  96          if (!empty($item->scaleid) and !isset($options[$item->scaleid])) {
  97              if ($scale = grade_scale::fetch(array('id'=>$item->scaleid))) {
  98                  $options[$scale->id] = $scale->get_name().get_string('incorrectcustomscale', 'grades');
  99              }
 100          }
 101          $mform->addElement('select', 'scaleid', get_string('scale'), $options);
 102          $mform->addHelpButton('scaleid', 'typescale', 'grades');
 103          $mform->disabledIf('scaleid', 'gradetype', 'noteq', GRADE_TYPE_SCALE);
 104  
 105          $choices = array();
 106          $choices[''] = get_string('choose');
 107          $choices['no'] = get_string('no');
 108          $choices['yes'] = get_string('yes');
 109          $mform->addElement('select', 'rescalegrades', get_string('modgraderescalegrades', 'grades'), $choices);
 110          $mform->addHelpButton('rescalegrades', 'modgraderescalegrades', 'grades');
 111          $mform->disabledIf('rescalegrades', 'gradetype', 'noteq', GRADE_TYPE_VALUE);
 112  
 113          $mform->addElement('float', 'grademax', get_string('grademax', 'grades'));
 114          $mform->addHelpButton('grademax', 'grademax', 'grades');
 115          $mform->disabledIf('grademax', 'gradetype', 'noteq', GRADE_TYPE_VALUE);
 116  
 117          if ((bool) get_config('moodle', 'grade_report_showmin')) {
 118              $mform->addElement('float', 'grademin', get_string('grademin', 'grades'));
 119              $mform->addHelpButton('grademin', 'grademin', 'grades');
 120              $mform->disabledIf('grademin', 'gradetype', 'noteq', GRADE_TYPE_VALUE);
 121          }
 122  
 123          $mform->addElement('float', 'gradepass', get_string('gradepass', 'grades'));
 124          $mform->addHelpButton('gradepass', 'gradepass', 'grades');
 125          $mform->disabledIf('gradepass', 'gradetype', 'eq', GRADE_TYPE_NONE);
 126          $mform->disabledIf('gradepass', 'gradetype', 'eq', GRADE_TYPE_TEXT);
 127  
 128          $mform->addElement('float', 'multfactor', get_string('multfactor', 'grades'));
 129          $mform->addHelpButton('multfactor', 'multfactor', 'grades');
 130          $mform->setAdvanced('multfactor');
 131          $mform->disabledIf('multfactor', 'gradetype', 'eq', GRADE_TYPE_NONE);
 132          $mform->disabledIf('multfactor', 'gradetype', 'eq', GRADE_TYPE_TEXT);
 133  
 134          $mform->addElement('float', 'plusfactor', get_string('plusfactor', 'grades'));
 135          $mform->addHelpButton('plusfactor', 'plusfactor', 'grades');
 136          $mform->setAdvanced('plusfactor');
 137          $mform->disabledIf('plusfactor', 'gradetype', 'eq', GRADE_TYPE_NONE);
 138          $mform->disabledIf('plusfactor', 'gradetype', 'eq', GRADE_TYPE_TEXT);
 139  
 140          /// grade display prefs
 141          $default_gradedisplaytype = grade_get_setting($COURSE->id, 'displaytype', $CFG->grade_displaytype);
 142          $options = array(GRADE_DISPLAY_TYPE_DEFAULT            => get_string('default', 'grades'),
 143                           GRADE_DISPLAY_TYPE_REAL               => get_string('real', 'grades'),
 144                           GRADE_DISPLAY_TYPE_PERCENTAGE         => get_string('percentage', 'grades'),
 145                           GRADE_DISPLAY_TYPE_LETTER             => get_string('letter', 'grades'),
 146                           GRADE_DISPLAY_TYPE_REAL_PERCENTAGE    => get_string('realpercentage', 'grades'),
 147                           GRADE_DISPLAY_TYPE_REAL_LETTER        => get_string('realletter', 'grades'),
 148                           GRADE_DISPLAY_TYPE_LETTER_REAL        => get_string('letterreal', 'grades'),
 149                           GRADE_DISPLAY_TYPE_LETTER_PERCENTAGE  => get_string('letterpercentage', 'grades'),
 150                           GRADE_DISPLAY_TYPE_PERCENTAGE_LETTER  => get_string('percentageletter', 'grades'),
 151                           GRADE_DISPLAY_TYPE_PERCENTAGE_REAL    => get_string('percentagereal', 'grades')
 152                           );
 153  
 154          asort($options);
 155  
 156          foreach ($options as $key=>$option) {
 157              if ($key == $default_gradedisplaytype) {
 158                  $options[GRADE_DISPLAY_TYPE_DEFAULT] = get_string('defaultprev', 'grades', $option);
 159                  break;
 160              }
 161          }
 162          $mform->addElement('select', 'display', get_string('gradedisplaytype', 'grades'), $options);
 163          $mform->addHelpButton('display', 'gradedisplaytype', 'grades');
 164          $mform->disabledIf('display', 'gradetype', 'eq', GRADE_TYPE_TEXT);
 165  
 166          $default_gradedecimals = grade_get_setting($COURSE->id, 'decimalpoints', $CFG->grade_decimalpoints);
 167          $options = array(-1=>get_string('defaultprev', 'grades', $default_gradedecimals), 0=>0, 1=>1, 2=>2, 3=>3, 4=>4, 5=>5);
 168          $mform->addElement('select', 'decimals', get_string('decimalpoints', 'grades'), $options);
 169          $mform->addHelpButton('decimals', 'decimalpoints', 'grades');
 170          $mform->setDefault('decimals', -1);
 171          $mform->disabledIf('decimals', 'display', 'eq', GRADE_DISPLAY_TYPE_LETTER);
 172          if ($default_gradedisplaytype == GRADE_DISPLAY_TYPE_LETTER) {
 173              $mform->disabledIf('decimals', 'display', "eq", GRADE_DISPLAY_TYPE_DEFAULT);
 174          }
 175          $mform->disabledIf('decimals', 'gradetype', 'eq', GRADE_TYPE_TEXT);
 176  
 177          /// hiding
 178          if ($item->cancontrolvisibility) {
 179              $mform->addElement('advcheckbox', 'hidden', get_string('hidden', 'grades'), '', [], [0, 1]);
 180              $mform->addElement('date_time_selector', 'hiddenuntil', get_string('hiddenuntil', 'grades'), array('optional'=>true));
 181              $mform->disabledIf('hidden', 'hiddenuntil[enabled]', 'checked');
 182          } else {
 183              $mform->addElement('static', 'hidden', get_string('hidden', 'grades'),
 184                      get_string('componentcontrolsvisibility', 'grades'));
 185              // Unset hidden to avoid data override.
 186              unset($item->hidden);
 187          }
 188          $mform->addHelpButton('hidden', 'hidden', 'grades');
 189  
 190          /// locking
 191          $mform->addElement('advcheckbox', 'locked', get_string('locked', 'grades'));
 192          $mform->addHelpButton('locked', 'locked', 'grades');
 193  
 194          $mform->addElement('date_time_selector', 'locktime', get_string('locktime', 'grades'), array('optional'=>true));
 195          $mform->disabledIf('locktime', 'gradetype', 'eq', GRADE_TYPE_NONE);
 196  
 197  /// parent category related settings
 198          $mform->addElement('header', 'headerparent', get_string('parentcategory', 'grades'));
 199  
 200          $mform->addElement('advcheckbox', 'weightoverride', get_string('adjustedweight', 'grades'));
 201          $mform->addHelpButton('weightoverride', 'weightoverride', 'grades');
 202          $mform->disabledIf('weightoverride', 'gradetype', 'eq', GRADE_TYPE_NONE);
 203          $mform->disabledIf('weightoverride', 'gradetype', 'eq', GRADE_TYPE_TEXT);
 204  
 205          $mform->addElement('float', 'aggregationcoef2', get_string('weight', 'grades'));
 206          $mform->addHelpButton('aggregationcoef2', 'weight', 'grades');
 207          $mform->disabledIf('aggregationcoef2', 'weightoverride');
 208          $mform->disabledIf('aggregationcoef2', 'gradetype', 'eq', GRADE_TYPE_NONE);
 209          $mform->disabledIf('aggregationcoef2', 'gradetype', 'eq', GRADE_TYPE_TEXT);
 210  
 211          $options = array();
 212          $coefstring = '';
 213          $categories = grade_category::fetch_all(array('courseid'=>$COURSE->id));
 214  
 215          foreach ($categories as $cat) {
 216              $cat->apply_forced_settings();
 217              $options[$cat->id] = $cat->get_name();
 218          }
 219  
 220          if (count($categories) > 1) {
 221              $mform->addElement('select', 'parentcategory', get_string('gradecategory', 'grades'), $options);
 222          }
 223  
 224  /// hidden params
 225          $mform->addElement('hidden', 'id', 0);
 226          $mform->setType('id', PARAM_INT);
 227  
 228          $mform->addElement('hidden', 'courseid', $COURSE->id);
 229          $mform->setType('courseid', PARAM_INT);
 230  
 231          $mform->addElement('hidden', 'itemtype', 'manual'); // all new items are manual only
 232          $mform->setType('itemtype', PARAM_ALPHA);
 233  
 234  /// add return tracking info
 235          $gpr = $this->_customdata['gpr'];
 236          $gpr->add_mform_elements($mform);
 237  
 238  /// mark advanced according to site settings
 239          if (isset($CFG->grade_item_advanced)) {
 240              $advanced = explode(',', $CFG->grade_item_advanced);
 241              foreach ($advanced as $el) {
 242                  if ($mform->elementExists($el)) {
 243                      $mform->setAdvanced($el);
 244                  }
 245              }
 246          }
 247  //-------------------------------------------------------------------------------
 248          // buttons
 249          $this->add_action_buttons();
 250  //-------------------------------------------------------------------------------
 251          $this->set_data($item);
 252      }
 253  
 254  
 255  /// tweak the form - depending on existing data
 256      function definition_after_data() {
 257          global $CFG, $COURSE;
 258  
 259          $mform =& $this->_form;
 260  
 261          if ($id = $mform->getElementValue('id')) {
 262              $gradeitem = grade_item::fetch(array('id' => $id));
 263              $parentcategory = $gradeitem->get_parent_category();
 264          } else {
 265              // If we do not have an id, we are creating a new grade item.
 266              $gradeitem = new grade_item(array('courseid' => $COURSE->id, 'itemtype' => 'manual'), false);
 267  
 268              // Assign the course category to this grade item.
 269              $parentcategory = grade_category::fetch_course_category($COURSE->id);
 270              $gradeitem->parent_category = $parentcategory;
 271          }
 272  
 273          if (!$gradeitem->is_raw_used()) {
 274              $mform->removeElement('plusfactor');
 275              $mform->removeElement('multfactor');
 276          }
 277  
 278          if ($gradeitem->is_outcome_item()) {
 279              // We have to prevent incompatible modifications of outcomes if outcomes disabled.
 280              $mform->removeElement('grademax');
 281              if ($mform->elementExists('grademin')) {
 282                  $mform->removeElement('grademin');
 283              }
 284              $mform->removeElement('gradetype');
 285              $mform->removeElement('display');
 286              $mform->removeElement('decimals');
 287              $mform->hardFreeze('scaleid');
 288  
 289          } else {
 290              if ($gradeitem->is_external_item()) {
 291                  // Following items are set up from modules and should not be overrided by user.
 292                  if ($mform->elementExists('grademin')) {
 293                      // The site setting grade_report_showmin may have prevented grademin being added to the form.
 294                      $mform->hardFreeze('grademin');
 295                  }
 296                  $mform->hardFreeze('itemname,gradetype,grademax,scaleid');
 297                  if ($gradeitem->itemnumber == 0) {
 298                      // The idnumber of grade itemnumber 0 is synced with course_modules.
 299                      $mform->hardFreeze('idnumber');
 300                  }
 301  
 302                  // For external items we can not change the grade type, even if no grades exist, so if it is set to
 303                  // scale, then remove the grademax and grademin fields from the form - no point displaying them.
 304                  if ($gradeitem->gradetype == GRADE_TYPE_SCALE) {
 305                      $mform->removeElement('grademax');
 306                      if ($mform->elementExists('grademin')) {
 307                          $mform->removeElement('grademin');
 308                      }
 309                  } else { // Not using scale, so remove it.
 310                      $mform->removeElement('scaleid');
 311                  }
 312  
 313                  // Always remove the rescale grades element if it's an external item.
 314                  $mform->removeElement('rescalegrades');
 315              } else if ($gradeitem->has_grades()) {
 316                  // Can't change the grade type or the scale if there are grades.
 317                  $mform->hardFreeze('gradetype, scaleid');
 318  
 319                  // If we are using scales then remove the unnecessary rescale and grade fields.
 320                  if ($gradeitem->gradetype == GRADE_TYPE_SCALE) {
 321                      $mform->removeElement('rescalegrades');
 322                      $mform->removeElement('grademax');
 323                      if ($mform->elementExists('grademin')) {
 324                          $mform->removeElement('grademin');
 325                      }
 326                  } else { // Remove the scale field.
 327                      $mform->removeElement('scaleid');
 328                      // Set the maximum grade to disabled unless a grade is chosen.
 329                      $mform->disabledIf('grademax', 'rescalegrades', 'eq', '');
 330                  }
 331              } else {
 332                  // Remove the rescale element if there are no grades.
 333                  $mform->removeElement('rescalegrades');
 334              }
 335          }
 336  
 337          // If we wanted to change parent of existing item - we would have to verify there are no circular references in parents!!!
 338          if ($id && $mform->elementExists('parentcategory')) {
 339              $mform->hardFreeze('parentcategory');
 340          }
 341  
 342          $parentcategory->apply_forced_settings();
 343  
 344          if (!$parentcategory->is_aggregationcoef_used()) {
 345              if ($mform->elementExists('aggregationcoef')) {
 346                  $mform->removeElement('aggregationcoef');
 347              }
 348  
 349          } else {
 350              $coefstring = $gradeitem->get_coefstring();
 351  
 352              if ($coefstring !== '') {
 353                  if ($coefstring == 'aggregationcoefextrasum' || $coefstring == 'aggregationcoefextraweightsum') {
 354                      // The advcheckbox is not compatible with disabledIf!
 355                      $coefstring = 'aggregationcoefextrasum';
 356                      $element =& $mform->createElement('checkbox', 'aggregationcoef', get_string($coefstring, 'grades'));
 357                  } else {
 358                      $element =& $mform->createElement('text', 'aggregationcoef', get_string($coefstring, 'grades'));
 359                  }
 360                  if ($mform->elementExists('parentcategory')) {
 361                      $mform->insertElementBefore($element, 'parentcategory');
 362                  } else {
 363                      $mform->insertElementBefore($element, 'id');
 364                  }
 365                  $mform->addHelpButton('aggregationcoef', $coefstring, 'grades');
 366              }
 367              $mform->disabledIf('aggregationcoef', 'gradetype', 'eq', GRADE_TYPE_NONE);
 368              $mform->disabledIf('aggregationcoef', 'gradetype', 'eq', GRADE_TYPE_TEXT);
 369              $mform->disabledIf('aggregationcoef', 'parentcategory', 'eq', $parentcategory->id);
 370          }
 371  
 372          // Remove fields used by natural weighting if the parent category is not using natural weighting.
 373          // Or if the item is a scale and scales are not used in aggregation.
 374          if ($parentcategory->aggregation != GRADE_AGGREGATE_SUM
 375                  || (empty($CFG->grade_includescalesinaggregation) && $gradeitem->gradetype == GRADE_TYPE_SCALE)) {
 376              if ($mform->elementExists('weightoverride')) {
 377                  $mform->removeElement('weightoverride');
 378              }
 379              if ($mform->elementExists('aggregationcoef2')) {
 380                  $mform->removeElement('aggregationcoef2');
 381              }
 382          }
 383  
 384          if ($category = $gradeitem->get_item_category()) {
 385              if ($category->aggregation == GRADE_AGGREGATE_SUM) {
 386                  if ($mform->elementExists('gradetype')) {
 387                      $mform->hardFreeze('gradetype');
 388                  }
 389                  if ($mform->elementExists('grademin')) {
 390                      $mform->hardFreeze('grademin');
 391                  }
 392                  if ($mform->elementExists('grademax')) {
 393                      $mform->hardFreeze('grademax');
 394                  }
 395                  if ($mform->elementExists('scaleid')) {
 396                      $mform->removeElement('scaleid');
 397                  }
 398              }
 399          }
 400  
 401          // no parent header for course category
 402          if (!$mform->elementExists('aggregationcoef') and !$mform->elementExists('parentcategory')) {
 403              $mform->removeElement('headerparent');
 404          }
 405      }
 406  
 407  /// perform extra validation before submission
 408      function validation($data, $files) {
 409          global $COURSE;
 410          $grade_item = false;
 411          if ($data['id']) {
 412              $grade_item = new grade_item(array('id' => $data['id'], 'courseid' => $data['courseid']));
 413          }
 414  
 415          $errors = parent::validation($data, $files);
 416  
 417          if (array_key_exists('idnumber', $data)) {
 418              if ($grade_item) {
 419                  if ($grade_item->itemtype == 'mod') {
 420                      $cm = get_coursemodule_from_instance($grade_item->itemmodule, $grade_item->iteminstance, $grade_item->courseid);
 421                  } else {
 422                      $cm = null;
 423                  }
 424              } else {
 425                  $grade_item = null;
 426                  $cm = null;
 427              }
 428              if (!grade_verify_idnumber($data['idnumber'], $COURSE->id, $grade_item, $cm)) {
 429                  $errors['idnumber'] = get_string('idnumbertaken');
 430              }
 431          }
 432  
 433          if (array_key_exists('gradetype', $data) and $data['gradetype'] == GRADE_TYPE_SCALE) {
 434              if (empty($data['scaleid'])) {
 435                  $errors['scaleid'] = get_string('missingscale', 'grades');
 436              }
 437          }
 438  
 439          // We need to make all the validations related with grademax and grademin
 440          // with them being correct floats, keeping the originals unmodified for
 441          // later validations / showing the form back...
 442          // TODO: Note that once MDL-73994 is fixed we'll have to re-visit this and
 443          // adapt the code below to the new values arriving here, without forgetting
 444          // the special case of empties and nulls.
 445          $grademax = isset($data['grademax']) ? unformat_float($data['grademax']) : null;
 446          $grademin = isset($data['grademin']) ? unformat_float($data['grademin']) : null;
 447  
 448          if (!is_null($grademin) and !is_null($grademax)) {
 449              if ($grademax == $grademin or $grademax < $grademin) {
 450                  $errors['grademin'] = get_string('incorrectminmax', 'grades');
 451                  $errors['grademax'] = get_string('incorrectminmax', 'grades');
 452              }
 453          }
 454  
 455          // We do not want the user to be able to change the grade type or scale for this item if grades exist.
 456          if ($grade_item && $grade_item->has_grades()) {
 457              // Check that grade type is set - should never not be set unless form has been modified.
 458              if (!isset($data['gradetype'])) {
 459                  $errors['gradetype'] = get_string('modgradecantchangegradetype', 'grades');
 460              } else if ($data['gradetype'] !== $grade_item->gradetype) { // Check if we are changing the grade type.
 461                  $errors['gradetype'] = get_string('modgradecantchangegradetype', 'grades');
 462              } else if ($data['gradetype'] == GRADE_TYPE_SCALE) {
 463                  // Check if we are changing the scale - can't do this when grades exist.
 464                  if (isset($data['scaleid']) && ($data['scaleid'] !== $grade_item->scaleid)) {
 465                      $errors['scaleid'] = get_string('modgradecantchangescale', 'grades');
 466                  }
 467              }
 468          }
 469          if ($grade_item) {
 470              if ($grade_item->gradetype == GRADE_TYPE_VALUE) {
 471                  if ((((bool) get_config('moodle', 'grade_report_showmin')) &&
 472                      grade_floats_different($grademin, $grade_item->grademin)) ||
 473                      grade_floats_different($grademax, $grade_item->grademax)) {
 474                      if ($grade_item->has_grades() && empty($data['rescalegrades'])) {
 475                          $errors['rescalegrades'] = get_string('mustchooserescaleyesorno', 'grades');
 476                      }
 477                  }
 478              }
 479          }
 480  
 481          return $errors;
 482      }
 483  
 484  }
 485