DBAL-79 - Add Schema\Table::hasPrimaryKey() method.

lib/Doctrine/DBAL/Schema/Table.php

@@ -524,6 +524,16 @@ class Table extends AbstractAsset
         return $this->getIndex($this->_primaryKeyName);
     }
 
+    /**
+     * Check if this table has a primary key.
+     *
+     * @return bool
+     */
+    public function hasPrimaryKey()
+    {
+        return ($this->_primaryKeyName && $this->hasIndex($this->_primaryKeyName));
+    }
+
     /**
      * @param  string $indexName
      * @return bool

tests/Doctrine/Tests/DBAL/Schema/TableTest.php

@@ -416,4 +416,19 @@ class TableTest extends \PHPUnit_Framework_TestCase
         $this->assertEquals('`bar`', $table->getQuotedName($mysqlPlatform));
         $this->assertEquals('"bar"', $table->getQuotedName($sqlitePlatform));
     }
+
+    /**
+     * @group DBAL-79
+     */
+    public function testTableHasPrimaryKey()
+    {
+        $table = new Table("test");
+
+        $this->assertFalse($table->hasPrimaryKey());
+
+        $table->addColumn("foo", "integer");
+        $table->setPrimaryKey(array("foo"));
+
+        $this->assertTrue($table->hasPrimaryKey());
+    }
 }
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