以编程方式修改字段集合缺少hostEntity字段

Question

我正试图修改一个已经存在的节点中的字段集合，以便更改3数组中第一个元素的图像。问题是，当我执行entity_load或entity_lload_single时，主机实体信息没有设置，所以当我执行：时

$field_collection_item->save(true); // with or without the true
// OR
$fc_wrapper->save(true); // with or without the true

我得到以下错误：

Exception: Unable to save a field collection item without a valid reference to a host entity. in FieldCollectionItemEntity->save()

当我打印字段集合实体时，hostEntity:protected字段实际上是空的。我的字段集合设置如下：

• field_home_experts
  1. 专家形象<---只想更改此数据并将其余数据保留在下面
     • field_expert_image
     • 图像
  2. 专家姓名
     • 字段_专家名称
     • 文本
  3. 专家职称
     • 字段_专家_标题
     • 文本

以下是我试图用来修改现有节点字段集合的代码：

$node = getNode(1352); // Get the node I want to modify
// There can be up to 3 experts, and I want to modify the image of the first expert
$updateItem = $node->field_home_experts[LANGUAGE_NONE][0];
if ($updateItem) { // Updating
    // Grab the field collection that currently exists in the 0 spot
    $fc_item = reset(entity_load('field_collection_item', array($updateItem)));
    // Wrap the field collection entity in the field API wrapper
    $fc_wrapper = entity_metadata_wrapper('field_collection_item', $fc_item);
    // Set the new image in place of the current
    $fc_wrapper->field_expert_image->set((array)file_load(4316));
    // Save the field collection
    $fc_wrapper->save(true);
    // Save the node with the new field collection (not sure this is needed)
    node_save($node);
}       

如果有任何帮助，我们将不胜感激，我对Drupal作为一个整体（最终用户或开发人员）仍然很陌生。

Answer 1

好吧，我想我已经解决了这个问题，我写了一个函数来设置字段集合值：

// $node: (obj) node object returned from node_load()
// $collection: (string) can be found in drupal admin interface: 
//              structure > field collections > field name
// $fields: (array) see usage below
// $index: (int) the index to the element you wish to edit           
function updateFieldCollection($node, $collection, $fields = Array(), $index = 0) {
    if ($node && $collection && !empty($fields)) {
        // Get the field collection ID
        $eid = $node->{$collection}[LANGUAGE_NONE][$index]['value'];
        // Load the field collection with the ID from above
        $entity = entity_load_single('field_collection_item', array($eid));
        // Wrap the loaded field collection which makes setting/getting much easier
        $node_wrapper = entity_metadata_wrapper('field_collection_item', $entity);
        // Loop through our fields and set the values
        foreach ($fields as $field => $data) {
            $node_wrapper->{$field}->set($data);
        }
        // Once we have added all the values we wish to change then we need to 
        // save. This will modify the node and does not require node_save() so
        // at this point be sure it is all correct as this will save directly
        // to a published node 
        $node_wrapper->save(true);
    }
}

用法：

// id of the node you wish to modify
$node = node_load(123); 
// Call our function with the node to modify, the field collection machine name
// and an array setup as collection_field_name => value_you_want_to_set
// collection_field_name can be found in the admin interface:
// structure > field collections > manage fields
updateFieldCollection(
    $node,
    'field_home_experts',
    array (
        'field_expert_image' => (array)file_load(582), // Loads up an existing image
        'field_expert_name' => 'Some Guy',
        'field_expert_title' => 'Some Title',
    )
);

希望这能帮助其他人，因为我花了一整天的时间试图让它发挥作用（希望我不会永远是Drupal7的一个角落）。将格式化文本正确设置（）可能会出现问题，但我不确定此时是什么，所以请记住这一点（例如，如果您有一个格式为filtered_html的字段，则不确定在不做其他操作的情况下是否会正确设置）。

祝你好运！Jake

Answer 2

在使用上述函数后，我仍然收到问题中提到的错误。这就是对我有效的：

function updateFieldCollection($node, $collection, $fields = Array(), $index = 0) {
  $eid = $node->{$collection}[LANGUAGE_NONE][$index]['value'];
  $fc_item = entity_load('field_collection_item', array($eid));
  foreach ($fields as $field => $data) {
    $fc_item[$eid]->{$field}[LANGUAGE_NONE][0]['value'] = $data;
  }
  $fc_item[$eid]->save(TRUE);
}

我希望这能帮助到别人，因为我花了很长时间才开始工作。