Merge pull request #476 from deeky666/fix-mysql-foreign-key-creation

Fix foreign key propagation on non-supporting MySQL table engines

lib/Doctrine/DBAL/Platforms/MySqlPlatform.php

@@ -447,8 +447,14 @@ class MySqlPlatform extends AbstractPlatform
         $query .= $this->buildPartitionOptions($options);
 
         $sql[]  = $query;
+        $engine = 'INNODB';
 
-        if (isset($options['foreignKeys'])) {
+        if (isset($options['engine'])) {
+            $engine = strtoupper(trim($options['engine']));
+        }
+
+        // Propagate foreign key constraints only for InnoDB.
+        if (isset($options['foreignKeys']) && $engine === 'INNODB') {
             foreach ((array) $options['foreignKeys'] as $definition) {
                 $sql[] = $this->getCreateForeignKeySQL($definition, $tableName);
             }
@@ -651,6 +657,19 @@ class MySqlPlatform extends AbstractPlatform
             }
         }
 
+        $engine = 'INNODB';
+
+        if ($diff->fromTable instanceof Table && $diff->fromTable->hasOption('engine')) {
+            $engine = strtoupper(trim($diff->fromTable->getOption('engine')));
+        }
+
+        // Suppress foreign key constraint propagation on non-supporting engines.
+        if ('INNODB' !== $engine) {
+            $diff->addedForeignKeys   = array();
+            $diff->changedForeignKeys = array();
+            $diff->removedForeignKeys = array();
+        }
+
         $sql = array_merge($sql, parent::getPreAlterTableIndexForeignKeySQL($diff));
 
         return $sql;

tests/Doctrine/Tests/DBAL/Platforms/MySqlPlatformTest.php

@@ -2,8 +2,10 @@
 
 namespace Doctrine\Tests\DBAL\Platforms;
 
+use Doctrine\DBAL\Platforms\AbstractPlatform;
 use Doctrine\DBAL\Platforms\MySqlPlatform;
 use Doctrine\DBAL\Schema\Comparator;
+use Doctrine\DBAL\Schema\ForeignKeyConstraint;
 use Doctrine\DBAL\Types\Type;
 use Doctrine\DBAL\Schema\Table;
 use Doctrine\DBAL\Schema\TableDiff;
@@ -410,4 +412,76 @@ class MySqlPlatformTest extends AbstractPlatformTestCase
         $this->assertSame('MEDIUMBLOB', $this->_platform->getBinaryTypeDeclarationSQL(array('fixed' => true, 'length' => 16777215)));
         $this->assertSame('LONGBLOB', $this->_platform->getBinaryTypeDeclarationSQL(array('fixed' => true, 'length' => 16777216)));
     }
+
+    public function testDoesNotPropagateForeignKeyCreationForNonSupportingEngines()
+    {
+        $table = new Table("foreign_table");
+        $table->addColumn('id', 'integer');
+        $table->addColumn('fk_id', 'integer');
+        $table->addForeignKeyConstraint('foreign_table', array('fk_id'), array('id'));
+        $table->setPrimaryKey(array('id'));
+        $table->addOption('engine', 'MyISAM');
+
+        $this->assertSame(
+            array('CREATE TABLE foreign_table (id INT NOT NULL, fk_id INT NOT NULL, INDEX IDX_5690FFE2A57719D0 (fk_id), PRIMARY KEY(id)) DEFAULT CHARACTER SET utf8 COLLATE utf8_unicode_ci ENGINE = MyISAM'),
+            $this->_platform->getCreateTableSQL(
+                $table,
+                AbstractPlatform::CREATE_INDEXES|AbstractPlatform::CREATE_FOREIGNKEYS
+            )
+        );
+
+        $table = clone $table;
+        $table->addOption('engine', 'InnoDB');
+
+        $this->assertSame(
+            array(
+                'CREATE TABLE foreign_table (id INT NOT NULL, fk_id INT NOT NULL, INDEX IDX_5690FFE2A57719D0 (fk_id), PRIMARY KEY(id)) DEFAULT CHARACTER SET utf8 COLLATE utf8_unicode_ci ENGINE = InnoDB',
+                'ALTER TABLE foreign_table ADD CONSTRAINT FK_5690FFE2A57719D0 FOREIGN KEY (fk_id) REFERENCES foreign_table (id)'
+            ),
+            $this->_platform->getCreateTableSQL(
+                $table,
+                AbstractPlatform::CREATE_INDEXES|AbstractPlatform::CREATE_FOREIGNKEYS
+            )
+        );
+    }
+
+    public function testDoesNotPropagateForeignKeyAlterationForNonSupportingEngines()
+    {
+        $table = new Table("foreign_table");
+        $table->addColumn('id', 'integer');
+        $table->addColumn('fk_id', 'integer');
+        $table->addForeignKeyConstraint('foreign_table', array('fk_id'), array('id'));
+        $table->setPrimaryKey(array('id'));
+        $table->addOption('engine', 'MyISAM');
+
+        $addedForeignKeys   = array(new ForeignKeyConstraint(array('fk_id'), 'foo', array('id'), 'fk_add'));
+        $changedForeignKeys = array(new ForeignKeyConstraint(array('fk_id'), 'bar', array('id'), 'fk_change'));
+        $removedForeignKeys = array(new ForeignKeyConstraint(array('fk_id'), 'baz', array('id'), 'fk_remove'));
+
+        $tableDiff = new TableDiff('foreign_table');
+        $tableDiff->fromTable = $table;
+        $tableDiff->addedForeignKeys = $addedForeignKeys;
+        $tableDiff->changedForeignKeys = $changedForeignKeys;
+        $tableDiff->removedForeignKeys = $removedForeignKeys;
+
+        $this->assertEmpty($this->_platform->getAlterTableSQL($tableDiff));
+
+        $table->addOption('engine', 'InnoDB');
+
+        $tableDiff = new TableDiff('foreign_table');
+        $tableDiff->fromTable = $table;
+        $tableDiff->addedForeignKeys = $addedForeignKeys;
+        $tableDiff->changedForeignKeys = $changedForeignKeys;
+        $tableDiff->removedForeignKeys = $removedForeignKeys;
+
+        $this->assertSame(
+            array(
+                'ALTER TABLE foreign_table DROP FOREIGN KEY fk_remove',
+                'ALTER TABLE foreign_table DROP FOREIGN KEY fk_change',
+                'ALTER TABLE foreign_table ADD CONSTRAINT fk_add FOREIGN KEY (fk_id) REFERENCES foo (id)',
+                'ALTER TABLE foreign_table ADD CONSTRAINT fk_change FOREIGN KEY (fk_id) REFERENCES bar (id)',
+            ),
+            $this->_platform->getAlterTableSQL($tableDiff)
+        );
+    }
 }