Merge pull request #69 from bgdevlab/feature/postgresSpecificPDO

Add Postgres specific PDO Adapter.
davedevelopment · Dec 8, 2014 · 04fba5c · 04fba5c
2 parents 3d729d0 + f519d7e
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diff --git a/README.md b/README.md
@@ -135,6 +135,33 @@ return $container;
 
 ```
 
+### Postgres PDO `SqlPgsql` 
+Adds support for qualifying the migrations table with a schema.
+
+```php
+<?php
+
+# phpmig
+
+use \Phpmig\Adapter,
+    \Pimple;
+
+$container = new Pimple();
+
+$container['db'] = $container->share(function() {
+    $dbh = new PDO(sprintf('pgsql:dbname=%s;host=%s;password=%s', 'dbname', 'localhost', 'password'), 'dbuser', '');
+    $dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+    return $dbh;
+});
+
+$container['phpmig.adapter'] = $container->share(function() use ($container) {
+    return new Adapter\PDO\SqlPgsql($container['db'], 'migrations', 'migrationschema');
+});	
+
+return $container;
+```
+
+
 
 Or you can use Doctrine's DBAL:
 

diff --git a/src/Phpmig/Adapter/PDO/SqlPgsql.php b/src/Phpmig/Adapter/PDO/SqlPgsql.php
@@ -0,0 +1,124 @@
+<?php
+
+namespace Phpmig\Adapter\PDO;
+
+use Phpmig\Migration\Migration,
+    Phpmig\Adapter\AdapterInterface,
+    PDO;
+
+/**
+ * Simple PDO adapter to work with Postgres SQL database in particular.
+ * @author Theodson https://github.com/theodson
+ */
+class SqlPgsql extends Sql
+{
+    private $quote = "\"";
+    private $schemaName = "public";
+
+    /**
+     * Constructor
+     *
+     * @param \PDO $connection
+     * @param string $tableName
+     */
+    public function __construct(\PDO $connection, $tableName, $schemaName = 'public')
+    {
+        parent::__construct($connection, $tableName);
+        $driver = $this->connection->getAttribute(PDO::ATTR_DRIVER_NAME);
+        $this->quote = in_array($driver, array('mysql', 'pgsql')) ? '"' : '`';
+        $this->schemaName = $schemaName;
+    }
+
+    private function quotedTableName()
+    {
+        $sql = "{$this->quote}{$this->schemaName}{$this->quote}.{$this->quote}{$this->tableName}{$this->quote}";
+        return $sql;
+    }
+
+    /**
+     * Fetch all
+     *
+     * @return array
+     */
+    public function fetchAll()
+    {
+        $sql = "SELECT {$this->quote}version{$this->quote} FROM {$this->quotedTableName()} ORDER BY {$this->quote}version{$this->quote} ASC";
+        return $this->connection->query($sql, PDO::FETCH_COLUMN, 0)->fetchAll();
+    }
+
+    /**
+     * Up
+     *
+     * @param Migration $migration
+     * @return self
+     */
+    public function up(Migration $migration)
+    {
+        $sql = "INSERT into {$this->quotedTableName()} (version) VALUES (:version);";
+        $this->connection->prepare($sql)
+            ->execute(array(':version' => $migration->getVersion()));
+        return $this;
+    }
+
+    /**
+     * Down
+     *
+     * @param Migration $migration
+     * @return self
+     */
+    public function down(Migration $migration)
+    {
+        $sql = "DELETE from {$this->quotedTableName()} where version = :version";
+        $this->connection->prepare($sql)
+            ->execute(array(':version' => $migration->getVersion()));
+        return $this;
+    }
+
+
+    /**
+     * Is the schema ready?
+     *
+     * @return bool
+     */
+    public function hasSchema()
+    {
+        $tables = $this->connection->query("SELECT table_name FROM information_schema.tables WHERE table_schema = '{$this->schemaName}';");
+        while ($table = $tables->fetchColumn()) {
+            if ($table == $this->tableName) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+
+    /**
+     * Create Schema
+     *
+     * @return DBAL
+     */
+    public function createSchema()
+    {
+        $sql = sprintf("SELECT schema_name FROM {$this->quote}information_schema{$this->quote}.{$this->quote}schemata{$this->quote} WHERE schema_name = '%s';",
+            $this->schemaName);
+        $pgSchemas = $this->connection->exec($sql);
+
+        if (empty($pgSchemas)) {
+            $sql = sprintf("CREATE SCHEMA %s;", $this->schemaName);
+            if (FALSE === $this->connection->exec($sql)) {
+                $e = $this->connection->errorInfo();
+            }
+        }
+
+        $sql = "CREATE table {$this->quotedTableName()} (version %s NOT NULL, {$this->quote}migrate_date{$this->quote} timestamp(6) WITH TIME ZONE DEFAULT now())";
+        $driver = $this->connection->getAttribute(PDO::ATTR_DRIVER_NAME);
+        $sql = sprintf($sql, in_array($driver, array('mysql', 'pgsql')) ? 'VARCHAR(255)' : '');
+
+        if (FALSE === $this->connection->exec($sql)) {
+            $e = $this->connection->errorInfo();
+        }
+        return $this;
+    }
+
+}
+