Doctrine_manual-1-2-en

Chapter 24: Migrations 332
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}
// ...
The valid options for the $definition are:
Name
name
local
foreign
Description
Optional constraint name
The local field(s)
The foreign reference field(s)
foreignTable The name of the foreign table
onDelete
onUpdate
deferred
Drop Foreign Key
Referential delete action
Referential update action
Deferred constraint checking
// ...
public function down()
{
$this->dropForeignKey('table_name', 'email_foreign_key');
}
// ...
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Add Column
// ...
public function up()
{
$this->addColumn('table_name', 'column_name', 'string', $options);
}
// ...
Rename Column
Some DBMS like sqlite do not implement the rename column operation. An exception is
thrown if you try and rename a column when using a sqlite connection.
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// ...
public function up()
{
$this->renameColumn('table_name', 'old_column_name',
'new_column_name');
}
// ...
Change Column
Change any aspect of an existing column:
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// ...
public function up()
{
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