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<?php |
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namespace Hoooklife\DynamodbPodm\Grammars; |
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use Aws\DynamoDb\Marshaler; |
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use Hoooklife\DynamodbPodm\DB; |
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use Hoooklife\DynamodbPodm\Query\Builder; |
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class DynamoDBGrammar { |
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protected $operators = []; |
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protected $params = []; |
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/** |
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* @var Builder |
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*/ |
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private $builder; |
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/** |
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* @var array |
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*/ |
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private $config; |
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/** |
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* DynamoDBGrammar constructor. |
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* @param Builder $builder |
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* @param array $config |
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*/ |
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public function __construct(Builder $builder, array $config) |
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{ |
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$this->builder = $builder; |
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$this->config = $config; |
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} |
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// 表达式解析 where |
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public function parseKeyConditionExpression(){ |
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$expression = []; |
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foreach ($this->builder->wheres as $where) { |
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$expression[] = "{$where['column']} {$where['operator']} {$where['value']}"; |
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} |
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return implode("and", $expression); |
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} |
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// select |
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public function parseProjectionExpression() |
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{ |
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if( reset($this->builder->columns) != '*' ){ |
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return implode(",", $this->columns); |
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} |
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return null; |
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} |
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// limit |
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public function parseLimit(){ |
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return $this->builder->limit; |
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} |
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/** |
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* Get the grammar specific operators. |
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* |
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* @return array |
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*/ |
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public function getOperators() |
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{ |
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return $this->operators; |
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} |
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public function all() |
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{ |
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$dynamodb = new \Aws\DynamoDb\DynamoDbClient($this->config["S3Config"]); |
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// var_dump((new Marshaler())->marshalItem([ |
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// ':title'=>'aaa' |
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// ])); |
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// var_dump((new Marshaler())->marshalJson(' |
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// { |
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// ":title": "aaa" |
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// } |
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// ')); |
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// die; |
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$params = [ |
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'TableName' => $this->builder->table, |
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'KeyConditionExpression' => 'title = :title', |
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'FilterExpression' => 'title = :title', |
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'ExpressionAttributeValues'=> (new Marshaler())->marshalItem([ |
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':title'=>'The Big New Movie' |
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]) |
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]; |
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$result = $dynamodb->scan($params); |
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var_dump($result); |
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} |
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} |
hooklife /
DynamoDBODM
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