Question

我在PHP 5.6.24上使用graphaware / neo4j-php-client 4.5.1和Neo4j 3.0.4。

我不明白如何查明交易是否失败。

例如，我尝试删除仍有关系的节点。如果我在这个简单的查询中运行DELETE：

$client->run
(
    'MATCH (node { name: {name} }) DELETE node',
    [ 'name' => 'Fred' ]
);

...我得到了这个异常，这是我期望的行为：

[GraphAware\Neo4j\Client\Exception\Neo4jException]
  org.neo4j.kernel.api.exceptions.ConstraintViolationTransactionFailureException: 
  Cannot delete node<31>, because it still has relationships. 
  To delete this node, you must first delete its relationships.

但是当我在事务中包装同一个查询时：

$transaction = $client->transaction();

$transaction->push
(
    'MATCH (node { name: {name} }) DELETE node',
    [ 'name' => 'Fred' ]
);

$results = $transaction->commit();

foreach ($results as $result)
{
    $summary = $result->summarize();
    $stats = $summary->updateStatistics();
    printf("Nodes deleted: %d\n", $stats->nodesDeleted());
}

printf("Transaction status: %s\n", $transaction->status());

... Neo4j不删除节点，但我看到了这一点（建议成功）而不是例外：

Nodes deleted: 1
Transaction status: COMMITED

我错过了什么，或者这是一个错误？提前谢谢！

Answer 1

谢谢，

这实际上是一个错误，我在https://github.com/graphaware/neo4j-php-client/commit/af8f01475a3cf63549498449574eb9c4bb8e7254

中修复了它

包含此修复程序的4.5.3版本应在几分钟内在packagist上提供。

请测试并报告。

如何在neo4j-php-client中检测失败的事务

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