Decouple unique index from unique constraint

lib/Doctrine/DBAL/Platforms/AbstractPlatform.php

@@ -23,6 +23,7 @@ use Doctrine\DBAL\Schema\Index;
 use Doctrine\DBAL\Schema\Sequence;
 use Doctrine\DBAL\Schema\Table;
 use Doctrine\DBAL\Schema\TableDiff;
+use Doctrine\DBAL\Schema\UniqueConstraint;
 use Doctrine\DBAL\TransactionIsolationLevel;
 use Doctrine\DBAL\Types;
 use Doctrine\DBAL\Types\Type;
@@ -1534,15 +1535,30 @@ abstract class AbstractPlatform
         $options['indexes']           = [];
         $options['primary']           = [];
 
-        if (($createFlags&self::CREATE_INDEXES) > 0) {
+        if (($createFlags & self::CREATE_INDEXES) > 0) {
             foreach ($table->getIndexes() as $index) {
                 /** @var $index Index */
-                if ($index->isPrimary()) {
-                    $options['primary']       = $index->getQuotedColumns($this);
-                    $options['primary_index'] = $index;
-                } else {
+                if (! $index->isPrimary()) {
                     $options['indexes'][$index->getQuotedName($this)] = $index;
+
+                    continue;
                 }
+
+                $options['primary']       = $index->getQuotedColumns($this);
+                $options['primary_index'] = $index;
+            }
+
+            foreach ($table->getUniqueConstraints() as $uniqueConstraint) {
+                /** @var UniqueConstraint $uniqueConstraint */
+                $options['uniqueConstraints'][$uniqueConstraint->getQuotedName($this)] = $uniqueConstraint;
+            }
+        }
+
+        if (($createFlags & self::CREATE_FOREIGNKEYS) > 0) {
+            $options['foreignKeys'] = [];
+
+            foreach ($table->getForeignKeys() as $fkConstraint) {
+                $options['foreignKeys'][] = $fkConstraint;
             }
         }
 
@@ -1551,7 +1567,6 @@ abstract class AbstractPlatform
 
         foreach ($table->getColumns() as $column) {
             /** @var Column $column */
-
             if ($this->_eventManager !== null && $this->_eventManager->hasListeners(Events::onSchemaCreateTableColumn)) {
                 $eventArgs = new SchemaCreateTableColumnEventArgs($column, $table, $this);
                 $this->_eventManager->dispatchEvent(Events::onSchemaCreateTableColumn, $eventArgs);
@@ -1579,13 +1594,6 @@ abstract class AbstractPlatform
             $columns[$columnData['name']] = $columnData;
         }
 
-        if (($createFlags&self::CREATE_FOREIGNKEYS) > 0) {
-            $options['foreignKeys'] = [];
-            foreach ($table->getForeignKeys() as $fkConstraint) {
-                $options['foreignKeys'][] = $fkConstraint;
-            }
-        }
-
         if ($this->_eventManager !== null && $this->_eventManager->hasListeners(Events::onSchemaCreateTable)) {
             $eventArgs = new SchemaCreateTableEventArgs($table, $columns, $options, $this);
             $this->_eventManager->dispatchEvent(Events::onSchemaCreateTable, $eventArgs);

lib/Doctrine/DBAL/Platforms/SqlitePlatform.php

@@ -893,10 +893,11 @@ class SqlitePlatform extends AbstractPlatform
 
         $sql      = [];
         $tableSql = [];
+
         if (! $this->onSchemaAlterTable($diff, $tableSql)) {
             $dataTable = new Table('__temp__' . $table->getName());
 
-            $newTable = new Table($table->getQuotedName($this), $columns, $this->getPrimaryIndexInAlteredTable($diff), $this->getForeignKeysInAlteredTable($diff), 0, $table->getOptions());
+            $newTable = new Table($table->getQuotedName($this), $columns, $this->getPrimaryIndexInAlteredTable($diff), [], $this->getForeignKeysInAlteredTable($diff), 0, $table->getOptions());
             $newTable->addOption('alter', true);
 
             $sql = $this->getPreAlterTableIndexForeignKeySQL($diff);

lib/Doctrine/DBAL/Schema/AbstractSchemaManager.php

@@ -263,12 +263,14 @@ abstract class AbstractSchemaManager
     {
         $columns     = $this->listTableColumns($tableName);
         $foreignKeys = [];
+
         if ($this->_platform->supportsForeignKeyConstraints()) {
             $foreignKeys = $this->listTableForeignKeys($tableName);
         }
+
         $indexes = $this->listTableIndexes($tableName);
 
-        return new Table($tableName, $columns, $indexes, $foreignKeys, false, []);
+        return new Table($tableName, $columns, $indexes, [], $foreignKeys, false, []);
     }
 
     /**
@@ -587,6 +589,7 @@ abstract class AbstractSchemaManager
     public function alterTable(TableDiff $tableDiff)
     {
         $queries = $this->_platform->getAlterTableSQL($tableDiff);
+
         if (! is_array($queries) || ! count($queries)) {
             return;
         }

lib/Doctrine/DBAL/Schema/Index.php

@@ -57,6 +57,7 @@ class Index extends AbstractAsset implements Constraint
         $isUnique = $isUnique || $isPrimary;
 
         $this->_setName($indexName);
+
         $this->_isUnique  = $isUnique;
         $this->_isPrimary = $isPrimary;
         $this->options    = $options;
@@ -64,6 +65,7 @@ class Index extends AbstractAsset implements Constraint
         foreach ($columns as $column) {
             $this->_addColumn($column);
         }
+
         foreach ($flags as $flag) {
             $this->addFlag($flag);
         }

lib/Doctrine/DBAL/Schema/SchemaException.php

@@ -18,7 +18,8 @@ class SchemaException extends DBALException
     public const SEQUENCE_ALREADY_EXISTS  = 80;
     public const INDEX_INVALID_NAME       = 90;
     public const FOREIGNKEY_DOESNT_EXIST  = 100;
-    public const NAMESPACE_ALREADY_EXISTS = 110;
+    public const CONSTRAINT_DOESNT_EXIST  = 110;
+    public const NAMESPACE_ALREADY_EXISTS = 120;
 
     /**
      * @param string $tableName
@@ -142,6 +143,21 @@ class SchemaException extends DBALException
         return new self("There exists no sequence with the name '" . $sequenceName . "'.", self::SEQUENCE_DOENST_EXIST);
     }
 
+    /**
+     * @param string $constraintName
+     * @param string $table
+     *
+     * @return self
+     */
+    public static function uniqueConstraintDoesNotExist($constraintName, $table)
+    {
+        return new self(sprintf(
+            'There exists no unique constraint with the name "%s" on table "%s".',
+            $constraintName,
+            $table
+        ), self::CONSTRAINT_DOESNT_EXIST);
+    }
+
     /**
      * @param string $fkName
      * @param string $table

lib/Doctrine/DBAL/Schema/UniqueConstraint.php

+<?php
+
+namespace Doctrine\DBAL\Schema;
+
+use Doctrine\DBAL\Platforms\AbstractPlatform;
+use InvalidArgumentException;
+use function array_keys;
+use function array_map;
+use function is_string;
+use function strtolower;
+
+/**
+ * Class for a unique constraint.
+ */
+class UniqueConstraint extends AbstractAsset implements Constraint
+{
+    /**
+     * Asset identifier instances of the column names the unique constraint is associated with.
+     * array($columnName => Identifier)
+     *
+     * @var Identifier[]
+     */
+    protected $columns = [];
+
+    /**
+     * Platform specific options
+     *
+     * @var mixed[]
+     */
+    private $options = [];
+
+    /**
+     * @param string   $indexName
+     * @param string[] $columns
+     * @param mixed[]  $options
+     */
+    public function __construct($indexName, array $columns, array $options = [])
+    {
+        $this->_setName($indexName);
+
+        $this->options = $options;
+
+        foreach ($columns as $column) {
+            $this->_addColumn($column);
+        }
+    }
+
+    /**
+     * @param string $column
+     *
+     * @return void
+     *
+     * @throws InvalidArgumentException
+     */
+    protected function _addColumn($column)
+    {
+        if (! is_string($column)) {
+            throw new InvalidArgumentException('Expecting a string as Index Column');
+        }
+
+        $this->_columns[$column] = new Identifier($column);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getColumns()
+    {
+        return array_keys($this->_columns);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getQuotedColumns(AbstractPlatform $platform)
+    {
+        $columns = [];
+
+        foreach ($this->_columns as $column) {
+            $columns[] = $column->getQuotedName($platform);
+        }
+
+        return $columns;
+    }
+
+    /**
+     * @return string[]
+     */
+    public function getUnquotedColumns()
+    {
+        return array_map([$this, 'trimQuotes'], $this->getColumns());
+    }
+
+    /**
+     * @param string $name
+     *
+     * @return bool
+     */
+    public function hasOption($name)
+    {
+        return isset($this->options[strtolower($name)]);
+    }
+
+    /**
+     * @param string $name
+     *
+     * @return mixed
+     */
+    public function getOption($name)
+    {
+        return $this->options[strtolower($name)];
+    }
+
+    /**
+     * @return mixed[]
+     */
+    public function getOptions()
+    {
+        return $this->options;
+    }
+}

tests/Doctrine/Tests/DBAL/Functional/ExceptionTest.php

@@ -314,6 +314,7 @@ class ExceptionTest extends DbalFunctionalTestCase
         $table->addColumn('id', 'integer');
 
         $this->expectException($exceptionClass);
+
         foreach ($schema->toSql($conn->getDatabasePlatform()) as $sql) {
             $conn->exec($sql);
         }

tests/Doctrine/Tests/DBAL/Functional/Schema/SchemaManagerFunctionalTestCase.php

@@ -976,7 +976,7 @@ class SchemaManagerFunctionalTestCase extends DbalFunctionalTestCase
 
     protected function getTestTable($name, $options = [])
     {
-        $table = new Table($name, [], [], [], false, $options);
+        $table = new Table($name, [], [], [], [], false, $options);
         $table->setSchemaConfig($this->schemaManager->createSchemaConfig());
         $table->addColumn('id', 'integer', ['notnull' => true]);
         $table->setPrimaryKey(['id']);
@@ -987,7 +987,7 @@ class SchemaManagerFunctionalTestCase extends DbalFunctionalTestCase
 
     protected function getTestCompositeTable($name)
     {
-        $table = new Table($name, [], [], [], false, []);
+        $table = new Table($name, [], [], [], [], false, []);
         $table->setSchemaConfig($this->schemaManager->createSchemaConfig());
         $table->addColumn('id', 'integer', ['notnull' => true]);
         $table->addColumn('other_id', 'integer', ['notnull' => true]);
@@ -999,14 +999,17 @@ class SchemaManagerFunctionalTestCase extends DbalFunctionalTestCase
     protected function assertHasTable($tables, $tableName)
     {
         $foundTable = false;
+
         foreach ($tables as $table) {
             self::assertInstanceOf(Table::class, $table, 'No Table instance was found in tables array.');
+
             if (strtolower($table->getName()) !== 'list_tables_test_new_name') {
                 continue;
             }
 
             $foundTable = true;
         }
+
         self::assertTrue($foundTable, 'Could not find new table');
     }
 

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

@@ -1272,6 +1272,7 @@ class ComparatorTest extends TestCase
                     'id_table1' => new Column('id_table1', Type::getType('integer')),
                 ],
                 [],
+                [],
                 [
                     new ForeignKeyConstraint(['id_table1'], 'table1', ['id'], 'fk_table2_table1'),
                 ]
@@ -1285,6 +1286,7 @@ class ComparatorTest extends TestCase
                     'id_table3' => new Column('id_table3', Type::getType('integer')),
                 ],
                 [],
+                [],
                 [
                     new ForeignKeyConstraint(['id_table3'], 'table3', ['id'], 'fk_table2_table3'),
                 ]

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

@@ -200,7 +200,7 @@ class TableTest extends DbalTestCase
     {
         $constraint = new ForeignKeyConstraint([], 'foo', []);
 
-        $tableA      = new Table('foo', [], [], [$constraint]);
+        $tableA      = new Table('foo', [], [], [], [$constraint]);
         $constraints = $tableA->getForeignKeys();
 
         self::assertCount(1, $constraints);
@@ -209,7 +209,7 @@ class TableTest extends DbalTestCase
 
     public function testOptions()
     {
-        $table = new Table('foo', [], [], [], false, ['foo' => 'bar']);
+        $table = new Table('foo', [], [], [], [], false, ['foo' => 'bar']);
 
         self::assertTrue($table->hasOption('foo'));
         self::assertEquals('bar', $table->getOption('foo'));