我正在尝试在我的 php 应用程序中使用 amazon dynamodb。我已正确设置凭据。现在,我正在尝试将数据从 Amazon DynamoDB 获取到我的应用程序。但它在查询行给了我一个异常(exception)。
完整的异常错误是
Unable to query: Error executing "Query" on "https://dynamodb.my-region.amazonaws.com"; AWS HTTP error: Client error:
POST https://dynamodb.my-region.amazonaws.com
resulted in a400 Bad Request
response: {"__type":"com.amazon.coral.validate#ValidationException","message":"Either the KeyConditions or KeyConditionExpression (truncated...) ValidationException (client): Either the KeyConditions or KeyConditionExpression parameter must be specified in the request. - {"__type":"com.amazon.coral.validate#ValidationException","message":"Either the KeyConditions or KeyConditionExpression parameter must be specified in the request."}
这是我的代码,
$sdk = new Aws\Sdk([
'region' => 'my region',
'version' => 'latest',
'credentials' => [
'key' => 'my key',
'secret' => 'my secret key'
],
'DynamoDb' => [
'region' => 'my region',
],
]);
$dynamodb = $sdk->createDynamoDb();
$marshaler = new Marshaler();
$tableName = 'My Table Name';
$params = [
'TableName' => $tableName
];
try {
$result = $dynamodb->query($params);
} catch (DynamoDbException $e) {
echo "Unable to query:\n";
echo $e->getMessage() . "\n";
}
错误来自 try-catch block 。任何人都可以告诉我这个错误的原因和解决方案吗? 对这个错误有什么建议吗?提前致谢。
最佳答案
请添加带有值的KeyConditionExpression
。
$params = [
'TableName' => $tableName,
'KeyConditionExpression' => 'yourHashKey = :v_hash'
'ExpressionAttributeValues' => array (
':v_hash' => array('S' => 'Hash_Value')
)
];
关于php - 400 错误请求响应 : KeyConditionExpression parameter must be specified in the request,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/48168007/