/**
* Resolve the keys into `BatchGetItem` eligible argument.
* @param string $table The name of the table.
* @param array $keys The keys.
* @return array
*/
private function buildBatchKeyArgument($table, $keys)
{
$tableDescription = $this->db->createCommand()->describeTable($table)->execute();
$keySchema = $tableDescription['Table']['KeySchema'];
if (ArrayHelper::isIndexed($keys)) {
$isScalar = is_string($keys[0]) || is_numeric($keys[0]);
if ($isScalar) {
return $this->buildBatchKeyArgumentFromIndexedArrayOfScalar($keySchema, $keys);
} elseif (ArrayHelper::isIndexed($keys[0])) {
return $this->buildBatchKeyArgumentFromIndexedArrayOfIndexedArray($keySchema, $keys);
} else {
return $this->buildBatchKeyArgumentFromIndexedArrayOfAssociativeArray($keySchema, $keys);
}
} else {
return $this->buildBatchGetItemFromAssociativeArray($keySchema, $keys);
}
}
