`yii\mongodb\Migration` created

extensions/mongodb/Migration.php

+<?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+namespace yii\mongodb;
+
+use yii\base\Component;
+use yii\db\MigrationInterface;
+use yii\di\Instance;
+use yii\helpers\Json;
+
+/**
+ * Migration is the base class for representing a MongoDB migration.
+ *
+ * Each child class of Migration represents an individual MongoDB migration which
+ * is identified by the child class name.
+ *
+ * Within each migration, the [[up()]] method should be overridden to contain the logic
+ * for "upgrading" the database; while the [[down()]] method for the "downgrading"
+ * logic.
+ *
+ * Migration provides a set of convenient methods for manipulating MongoDB data and schema.
+ * For example, the [[createIndex()]] method can be used to create a collection index.
+ * Compared with the same methods in [[Collection]], these methods will display extra
+ * information showing the method parameters and execution time, which may be useful when
+ * applying migrations.
+ *
+ * @author Klimov Paul <klimov@zfort.com>
+ * @since 2.0
+ */
+abstract class Migration extends Component implements MigrationInterface
+{
+    /**
+     * @var Connection|string the MongoDB connection object or the application component ID of the MongoDB connection
+     * that this migration should work with.
+     */
+    public $db = 'mongodb';
+
+    /**
+     * Initializes the migration.
+     * This method will set [[db]] to be the 'db' application component, if it is null.
+     */
+    public function init()
+    {
+        parent::init();
+        $this->db = Instance::ensure($this->db, Connection::className());
+    }
+
+    /**
+     * Creates new collection with the specified options.
+     * @param string|array $collection name of the collection
+     * @param array $options collection options in format: "name" => "value"
+     * @return \MongoCollection new Mongo collection instance.
+     */
+    public function createCollection($collection, $options = [])
+    {
+        if (is_array($collection)) {
+            list($database, $collectionName) = $collection;
+        } else {
+            $database = null;
+            $collectionName = $collection;
+        }
+        echo "    > create collection " . $this->composeCollectionLogName($collection) . " ...";
+        $time = microtime(true);
+        $this->db->getDatabase($database)->createCollection($collectionName, $options);
+        echo " done (time: " . sprintf('%.3f', microtime(true) - $time) . "s)\n";
+    }
+
+    /**
+     * Drops existing collection.
+     * @param string|array $collection name of the collection
+     */
+    public function dropCollection($collection)
+    {
+        echo "    > drop collection " . $this->composeCollectionLogName($collection) . " ...";
+        $time = microtime(true);
+        $this->db->getCollection($collection)->drop();
+        echo " done (time: " . sprintf('%.3f', microtime(true) - $time) . "s)\n";
+    }
+
+    /**
+     * Creates an index on the collection and the specified fields.
+     * @param string|array $collection name of the collection
+     * @param array|string $columns column name or list of column names.
+     * @param array $options list of options in format: optionName => optionValue.
+     */
+    public function createIndex($collection, $columns, $options = [])
+    {
+        echo "    > create index on " . $this->composeCollectionLogName($collection) . " (" . Json::encode((array)$columns) . empty($options) ? "" : ", " . Json::encode($options) . ") ...";
+        $time = microtime(true);
+        $this->db->getCollection($collection)->createIndex($columns, $options);
+        echo " done (time: " . sprintf('%.3f', microtime(true) - $time) . "s)\n";
+    }
+
+    /**
+     * Drop indexes for specified column(s).
+     * @param string|array $collection name of the collection
+     * @param string|array $columns column name or list of column names.
+     */
+    public function dropIndex($collection, $columns)
+    {
+        echo "    > drop index on " . $this->composeCollectionLogName($collection) . " (" . Json::encode((array)$columns) . ") ...";
+        $time = microtime(true);
+        $this->db->getCollection($collection)->dropIndex($columns);
+        echo " done (time: " . sprintf('%.3f', microtime(true) - $time) . "s)\n";
+    }
+
+    /**
+     * Drops all indexes for specified collection.
+     * @param string|array $collection name of the collection.
+     */
+    public function dropAllIndexes($collection)
+    {
+        echo "    > drop all indexes on " . $this->composeCollectionLogName($collection) . ") ...";
+        $time = microtime(true);
+        $this->db->getCollection($collection)->dropAllIndexes();
+        echo " done (time: " . sprintf('%.3f', microtime(true) - $time) . "s)\n";
+    }
+
+    /**
+     * Composes string representing collection name.
+     * @param array|string $collection collection name.
+     * @return string collection name.
+     */
+    protected function composeCollectionLogName($collection)
+    {
+        if (is_array($collection)) {
+            list($database, $collection) = $collection;
+            return $database . '.' . $collection;
+        } else {
+            return $collection;
+        }
+    }
+}
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