added createForeignKey() support to export module and migrations

lib/Doctrine/Export.php

@@ -458,6 +458,17 @@ class Doctrine_Export extends Doctrine_Connection_Module
 
         return $query;
     }
+    /**
+     * createForeignKey
+     *
+     * @param string    $table         name of the table on which the foreign key is to be created
+     * @param array     $definition    associative array that defines properties of the foreign key to be created.
+     * @return string
+     */
+    public function createForeignKey($table, array $definition)
+    {
+        return $this->conn->execute($this->createForeignKeySql($table, $definition));
+    }
     /**
      * alter an existing table
      * (this method is implemented by the drivers)

lib/Doctrine/Migration.php

@@ -43,7 +43,8 @@ class Doctrine_Migration
                                'added_indexes'       =>  array(),
                                'removed_indexes'     =>  array(),
                                'created_constraints' =>  array(),
-                               'dropped_constraints' =>  array()),
+                               'dropped_constraints' =>  array(),
+                               'created_fks'         =>  array()),
               $migrationTableName = 'migration_version',
               $migrationClassesDirectory = array(),
               $migrationClasses = array();
@@ -411,7 +412,7 @@ class Doctrine_Migration
     }
     
     /**
-     * createConstraint
+     * dropConstraint
      *
      * @param string $tableName
      * @param string $constraintName
@@ -424,6 +425,20 @@ class Doctrine_Migration
         $this->addChange('dropped_constraints', $options);
     }
     
+    /**
+     * createForeignKey
+     *
+     * @param string $tableName
+     * @param string $constraintName
+     * @return void
+     */
+    public function createForeignKey($tableName, array $definition)
+    {
+        $options = get_defined_vars();
+        
+        $this->addChange('created_fks', $options);
+    }
+    
     /**
      * addColumn
      *

lib/Doctrine/Migration/Process.php

@@ -142,4 +142,12 @@ class Doctrine_Migration_Process
                     $constraint['primary']);
         }
     }
+    
+    public function processCreatedFks($foreignKeys)
+    {
+        foreach ($foreignKeys as $fk) {
+            $conn = $this->getConnection($fk['tableName']);
+            $conn->export->createForeignKey($fk['tableName'], $fk['definition']);
+        }
+    }
 }
\ No newline at end of file