改名

Database/Relation.php

@@ -0,0 +1,111 @@
+<?php
+
+
+namespace Database;
+
+
+use Snowflake\Abstracts\Component;
+
+/**
+ * Class Relation
+ * @package BeReborn\db
+ */
+class Relation extends Component
+{
+
+	private $_relations = [];
+
+	/** @var ActiveQuery[] $_query */
+	private $_query = [];
+
+	/**
+	 * @param string $identification
+	 * @param ActiveQuery $query
+	 * @return $this
+	 */
+	public function bindIdentification(string $identification, ActiveQuery $query)
+	{
+		$this->_query[$identification] = $query;
+		return $this;
+	}
+
+	/**
+	 * @param $name
+	 * @return ActiveQuery|null
+	 */
+	public function getQuery(string $name)
+	{
+		return $this->_query[$name] ?? null;
+	}
+
+
+	/**
+	 * @param $identification
+	 * @param $localValue
+	 * @return ActiveRecord|mixed
+	 * @throws
+	 */
+	public function first(string $identification, $localValue)
+	{
+		$_identification = $identification . '_count_' . $localValue;
+		if (isset($this->_relations[$_identification]) && $this->_relations[$_identification] !== null) {
+			return $this->_relations[$_identification];
+		}
+
+		$activeModel = $this->_query[$identification]->first();
+		if (empty($activeModel)) {
+			return null;
+		}
+
+		return $this->_relations[$_identification] = $activeModel;
+	}
+
+
+	/**
+	 * @param $identification
+	 * @param $localValue
+	 * @return ActiveRecord|mixed
+	 * @throws
+	 */
+	public function count(string $identification, $localValue)
+	{
+		$_identification = $identification . '_' . $localValue;
+		if (isset($this->_relations[$_identification]) && $this->_relations[$_identification] !== null) {
+			return $this->_relations[$_identification];
+		}
+
+		$activeModel = $this->_query[$identification]->count();
+		if (empty($activeModel)) {
+			return null;
+		}
+
+		return $this->_relations[$_identification] = $activeModel;
+	}
+
+
+	/**
+	 * @param $identification
+	 * @param $localValue
+	 * @return array|Collection|mixed|null
+	 * @throws
+	 */
+	public function get(string $identification, $localValue)
+	{
+		if (is_array($localValue)) {
+			$_identification = $identification . '_' . implode('_', $localValue);
+		} else {
+			$_identification = $identification . '_' . $localValue;
+		}
+		if (isset($this->_relations[$_identification]) && $this->_relations[$_identification] !== null) {
+			return $this->_relations[$_identification];
+		}
+
+		$activeModel = $this->_query[$identification]->get();
+		if (empty($activeModel)) {
+			return null;
+		}
+
+		return $this->_relations[$_identification] = $activeModel;
+	}
+
+}