/**
* Initializes the DB connection component.
* This method will initialize the [[db]] property to make sure it refers to a valid DB connection.
* @return void
* @throws InvalidConfigException If [[db]] is invalid.
*/
public function init()
{
parent::init();
if (is_string($this->db)) {
$this->db = Instance::ensure($this->db, Connection::className());
}
}
/**
* 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);
}
}
/**
* @param string $table The name of the Table.
* @param array $keys The keys of the row.
* @param array $updates The hash attribute => value will be updated.
* @param string $action Action of the method, either 'PUT'|'ADD'|'DELETE'.
* @param array $options Additional options to the request argument.
* @return static
*/
public function updateItemSelectedAction($table, array $keys, array $updates, $action, array $options = [])
{
list($name, $query_argument) = $this->db->getQueryBuilder()->updateItemSelectedAction($table, $keys, $updates, $action, $options);
return $this->setCommand($name, $query_argument);
}
/**
* @return DynamoDbClient
*/
protected function getClient()
{
return $this->db->getClient();
}
/**
* Get multiple items from table using keys.
*
* @param string $table The name of the table.
* @param array $keys The keys of the row. This can be indexed array of
* scalar value, indexed array of array of scalar value, indexed array of
* associative array.
* @param array $options Additional options to the request argument.
* @return static
* @see QueryBuilder::batchGetItem
*/
public function batchGetItem($table, array $keys, array $options = [])
{
list($name, $argument) = $this->db->getQueryBuilder()->batchGetItem($table, $keys, $options);
return $this->setCommand($name, $argument);
}