从Drupal 8中的术语实体参考中获取字段时，试图获取非对象的属性

Question

我正在创建内容类型传记的XML feed，该XML具有实体参考术语字段。我正在加载节点，加载段落字段，然后使用TERM ::加载术语对象在段落字段中加载术语对象，该段落字段是by Term ID编号。但是，当我尝试从术语本身中获取字段时，我不能在我使用的行 -> name-> value的行上扔"试图获取非对象的属性"而不这样做。这些领域成功地被抓住并渲染了，这些错误只是随之而来的。尝试使用 -> getName((方法完全打破了提要。

private function xmlOutput($input) {
  $node = Node::load($input);
  $educationArray = $node->get('field_group_education');
  $educationOutput = [];
  foreach ($educationArray as $key => $value) {
    $educationGroupID = $node->get('field_group_education')[$key]->target_id;
    $educationGroup = Paragraph::load($educationGroupID);
    $honors = $educationGroup->get('field_academic_honors')->value;
    $degreeID = $educationGroup->get('field_degrees')->target_id;
    $degree = Term::load($degreeID)->name->value;
    $educationID = $educationGroup->get('field_education')->target_id;
    $schoolName = Term::load($educationID)->name->value;
    $yearGraduated = $educationGroup->get('field_year_graduated')->value;
    $educationRender = '<professionalEducation>
                        <order>' . $key  . '</order>
                        <school whereField="Name" whereValue="' . $schoolName . '" autoCreate="true"/>
                        <educationType whereField="Name" whereValue="' . $degree . '" autoCreate="true"/>
                        <yearGraduated>' . $yearGraduated . '</yearGraduated>
                        <degree whereField="Name" whereValue="' . $degree . '" autoCreate="true"/> . 
                        <honors>' . $honors . '</honors>
                        </professionalEducation>';
    array_push($educationOutput, $educationRender);
  }
  $compiled = [
    '<education>',
    implode($educationOutput),
    '</education>',
  ];
  return implode('', $compiled);

}

这将成功

<education>
  <professionalEducation>
    <order>0</order>
    <school whereField="Name" whereValue="education term 1" 
    autoCreate="true"/>
    <educationType whereField="Name" whereValue="AA" autoCreate="true"/>
    <yearGraduated>1990</yearGraduated>
    <degree whereField="Name" whereValue="AA" autoCreate="true"/>
    <honors>Honors 1</honors>
  </professionalEducation>
  <professionalEducation>
    <order>1</order>
    <school whereField="Name" whereValue="education term 2" autoCreate="true"/>
    <educationType whereField="Name" whereValue="AB" autoCreate="true"/>
    <yearGraduated>2000</yearGraduated>
    <degree whereField="Name" whereValue="AB" autoCreate="true"/>
    <honors>honors 2</honors>
  </professionalEducation>
</education>

，但我会得到具有 -> name-> value行的"试图获得非对象的属性"的PHP错误我尝试使用 -> getName((方法，但这立即引发了500个错误。使用ISSET检查是否有一个值对使GetName((工作也不有用。

$degree = '';
if(isset(Term::load($degreeID)->name->value)) {
  $degree = $degreeObject->name->value;
}

有效，但错误仍然存在

$degree = '';
if(isset(Term::load($degreeID)->getName())) {
  $degree = $degreeObject->getName();
}

扔500个错误，但也摆脱了错误

Answer 1

检查target_id isset()。修改您的代码如下

  $educationGroup = $value->entity;
  $honors = isset($educationGroup->field_academic_honors->target_id) ? $educationGroup->field_academic_honors->value : '';
  $degree = isset($educationGroup->field_degrees->target_id) ? $educationGroup->field_degrees->entity->name->value : '';
  $schoolName = isset($educationGroup->field_education->target_id) ? $educationGroup->field_education->entity->name->value : '';
  $yearGraduated = isset($educationGroup->field_year_graduated->target_id) ? $educationGroup->field_year_graduated->value : '';

无需加载段 and term 每次都可以使用entity参考获得它们。