duanlie2709 2014-12-25 05:20
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如何在php中为GAE数据存储生成实体ID?

i am trying to insert new entity using PHP client library into datastore, i am using datastore_connect.php file from this example, https://github.com/amygdala/appengine_php_datastore_example

I want to insert entity with auto id, not the name. I see that there is function setId(), but i dont know how to generate proper id. Whats the best practice in doing so?

Thanks

function createKeyForTestItem () {
    $path = new Google_Service_Datastore_KeyPathElement();
    $path->setKind("testkind");
    $path->setName("testkeyname");
    //$path->setId(??)
    $key = new Google_Service_Datastore_Key();
    $key->setPath([$path]);
    return $key;
}
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  • 普通网友 2014-12-30 18:20
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    You can have Cloud Datastore generate the ID for you by populating the insertAutoId field on the mutation instead of the upsert field.

    Here's a code snippet (adapted from the datastore_connect.php file you posted):

    function create_key() {
      $path = new Google_Service_Datastore_KeyPathElement();
      $path->setKind("testkind");
      // Neither name nor ID is set.
      $key = new Google_Service_Datastore_Key();
      $key->setPath([$path]);
      return $key;
    }
    function create_entity() {
      $entity = new Google_Service_Datastore_Entity();
      $entity->setKey(create_key());
      // Add properties...
      return $entity;
    }
    function create_commit_request() {
      $entity = create_entity();
      $mutation = new Google_Service_Datastore_Mutation();
      $mutation->setInsertAutoId([$entity]);  // Causes ID to be allocated.
      $req = new Google_Service_Datastore_CommitRequest();
      $req->setMode('NON_TRANSACTIONAL');
      $req->setMutation($mutation);
      return $req;
    }
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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