SchemaDiff.php
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<?php
namespace Doctrine\DBAL\Schema;
use Doctrine\DBAL\Platforms\AbstractPlatform;
use function array_merge;
/**
* Schema Diff.
*/
class SchemaDiff
{
/** @var Schema|null */
public $fromSchema;
/**
* All added namespaces.
*
* @var string[]
*/
public $newNamespaces = [];
/**
* All removed namespaces.
*
* @var string[]
*/
public $removedNamespaces = [];
/**
* All added tables.
*
* @var Table[]
*/
public $newTables = [];
/**
* All changed tables.
*
* @var TableDiff[]
*/
public $changedTables = [];
/**
* All removed tables.
*
* @var Table[]
*/
public $removedTables = [];
/** @var Sequence[] */
public $newSequences = [];
/** @var Sequence[] */
public $changedSequences = [];
/** @var Sequence[] */
public $removedSequences = [];
/** @var ForeignKeyConstraint[] */
public $orphanedForeignKeys = [];
/**
* Constructs an SchemaDiff object.
*
* @param Table[] $newTables
* @param TableDiff[] $changedTables
* @param Table[] $removedTables
*/
public function __construct($newTables = [], $changedTables = [], $removedTables = [], ?Schema $fromSchema = null)
{
$this->newTables = $newTables;
$this->changedTables = $changedTables;
$this->removedTables = $removedTables;
$this->fromSchema = $fromSchema;
}
/**
* The to save sql mode ensures that the following things don't happen:
*
* 1. Tables are deleted
* 2. Sequences are deleted
* 3. Foreign Keys which reference tables that would otherwise be deleted.
*
* This way it is ensured that assets are deleted which might not be relevant to the metadata schema at all.
*
* @return string[]
*/
public function toSaveSql(AbstractPlatform $platform)
{
return $this->_toSql($platform, true);
}
/**
* @return string[]
*/
public function toSql(AbstractPlatform $platform)
{
return $this->_toSql($platform, false);
}
/**
* @param bool $saveMode
*
* @return string[]
*/
protected function _toSql(AbstractPlatform $platform, $saveMode = false)
{
$sql = [];
if ($platform->supportsSchemas()) {
foreach ($this->newNamespaces as $newNamespace) {
$sql[] = $platform->getCreateSchemaSQL($newNamespace);
}
}
if ($platform->supportsForeignKeyConstraints() && $saveMode === false) {
foreach ($this->orphanedForeignKeys as $orphanedForeignKey) {
$sql[] = $platform->getDropForeignKeySQL($orphanedForeignKey, $orphanedForeignKey->getLocalTable());
}
}
if ($platform->supportsSequences() === true) {
foreach ($this->changedSequences as $sequence) {
$sql[] = $platform->getAlterSequenceSQL($sequence);
}
if ($saveMode === false) {
foreach ($this->removedSequences as $sequence) {
$sql[] = $platform->getDropSequenceSQL($sequence);
}
}
foreach ($this->newSequences as $sequence) {
$sql[] = $platform->getCreateSequenceSQL($sequence);
}
}
$foreignKeySql = [];
foreach ($this->newTables as $table) {
$sql = array_merge(
$sql,
$platform->getCreateTableSQL($table, AbstractPlatform::CREATE_INDEXES)
);
if (! $platform->supportsForeignKeyConstraints()) {
continue;
}
foreach ($table->getForeignKeys() as $foreignKey) {
$foreignKeySql[] = $platform->getCreateForeignKeySQL($foreignKey, $table);
}
}
$sql = array_merge($sql, $foreignKeySql);
if ($saveMode === false) {
foreach ($this->removedTables as $table) {
$sql[] = $platform->getDropTableSQL($table);
}
}
foreach ($this->changedTables as $tableDiff) {
$sql = array_merge($sql, $platform->getAlterTableSQL($tableDiff));
}
return $sql;
}
}