Drupal：将分类术语与大量重复项合并

Question

我有一个用于研究目的的数据库。不幸的是，在这项研究中，算法被允许运行的时间过长，从而无意中创建了重复的分类术语，而不是为术语的第一个实例重复使用原始 TID。

为了更正此问题，尝试使用“term_merge”和“taxonomy_manager”模块。 “term_merge”提供了一个用于删除重复项的界面，并且它能够设置一次加载多少项的限制，以防止耗尽数据库服务器的内存限制。但是，对于我的用例，我什至无法加载位于 /admin/structure/taxonomy/[My-Vocabulary]/merge 的配置屏幕，更不用说在 /admin/structure/taxonomy/[My -Vocabulary]/merge/duplicates，因为尽管所述限制设置为 1024M，但它们都耗尽了内存限制。

为了解决这个问题，我编写了一个自定义模块，它调用 term_merge 模块中的 term_merge 函数。由于该项目中只有一个节点包使用了相关分类词汇，因此我可以安全地编写自己的逻辑来合并重复的术语，而无需使用 term_merge 模块提供的功能，但我想使用它，因为它是为此目的而设计的，并且理论上可以实现更安全的过程。

我的模块提供了一个页面回调以及获取引用重复分类术语的 TID 列表的逻辑。这是包含对 term_merge 函数的调用的代码：

//Use first element, with lowest TID value, as the 'trunk'
// which all other terms will be merged into

$trunk = $tids[0];

//Remove first element from branch array, to ensure the trunk 
//is not being merged into itself

array_shift($tids);

//Set the merge settings array, similarly to the default values 
//which are given in _term_merge_batch_process of term_merge.batch.inc

$merge_settings = array(
  'term_branch_keep' => FALSE,
  'merge_fields' => array(),
  'keep_only_unique' => TRUE,
  'redirect' => -1,
  'synonyms' => array(),
);

term_merge($tids, $trunk, $merge_settings);

这不会导致任何合并条款，也不会在 Watchdog 或网络服务器日志中提供任何错误或通知。

我还尝试为要合并的每个单独的重复 TID 调用 term_merge，而不是使用整个 TID 数组。

我将不胜感激有关如何以编程方式最好地使用 term_merge 函数的任何意见，或者允许我从大型数据库中删除许多重复术语的替代方法，其中一些术语有数千个重复项。

作为参考，这里是提供有关 term_merge 中采用的参数的信息的 cmets，可在贡献的 term_merge 模块的 term_merge.module 中找到：

/**
 * Merge terms one into another using batch API.
 *
 * @param array $term_branch
 *   A single term tid or an array of term tids to be merged, aka term branches
 * @param int $term_trunk
 *   The tid of the term to merge term branches into, aka term trunk
 * @param array $merge_settings
 *   Array of settings that control how merging should happen.     Currently
 *   supported settings are:
 *     - term_branch_keep: (bool) Whether the term branches should not be
 *       deleted, also known as "merge only occurrences" option
 *     - merge_fields: (array) Array of field names whose values should be
 *       merged into the values of corresponding fields of term trunk (until
 *       each field's cardinality limit is reached)
 *     - keep_only_unique: (bool) Whether after merging within one field only
 *       unique taxonomy term references should be kept in other entities. If
 *       before merging your entity had 2 values in its taxonomy term reference
 *       field and one was pointing to term branch while another was pointing to
 *       term trunk, after merging you will end up having your entity
 *       referencing to the same term trunk twice. If you pass TRUE in this
 *       parameter, only a single reference will be stored in your entity after
 *       merging
 *     - redirect: (int) HTTP code for redirect from $term_branch to
 *       $term_trunk, 0 stands for the default redirect defined in Redirect
 *       module. Use constant TERM_MERGE_NO_REDIRECT to denote not creating any
 *       HTTP redirect. Note: this parameter requires Redirect module enabled,
 *       otherwise it will be disregarded
 *     - synonyms: (array) Array of field names of trunk term into which branch
 *       terms should be added as synonyms (until each field's cardinality limit
 *       is reached). Note: this parameter requires Synonyms module enabled,
 *       otherwise it will be disregarded
 *     - step: (int) How many term branches to merge per script run in batch. If
 *       you are hitting time or memory limits, decrease this parameter
 */

Answer 1

似乎由于函数 term_merge 的开发意图是在函数中用于处理表单提交，因此我的自定义模块以无法调用 batch_process 的方式使用它。

显式调用以下内容可以解决此问题：

batch_process()

不需要将参数传递给函数。