Allow named Arguments to be passed to Dto

Allow to change argument order or use variadic argument in dto constructor using new named keyword

docs/en/reference/dql-doctrine-query-language.rst

@@ -591,23 +591,80 @@ You can also nest several DTO :
             // Bind values to the object properties.
         }
     }
-	
+
     class AddressDTO
     {
         public function __construct(string $street, string $city, string $zip)
         {
             // Bind values to the object properties.
         }
     }
-	
+
 .. code-block:: php
 
     <?php
     $query = $em->createQuery('SELECT NEW CustomerDTO(c.name, e.email, NEW AddressDTO(a.street, a.city, a.zip)) FROM Customer c JOIN c.email e JOIN c.address a');
     $users = $query->getResult(); // array of CustomerDTO
-	
+
 Note that you can only pass scalar expressions or other Data Transfer Objects to the constructor.
 
+If you use your data transfer objects for multiple queries, and you would rather not have to
+specify arguments that precede the ones you are really interested in, you can use named arguments.
+
+Consider the following DTO, which uses optional arguments:
+
+.. code-block:: php
+
+    <?php
+
+    class CustomerDTO
+    {
+        public function __construct(
+            public string|null $name = null,
+            public string|null $email = null,
+            public string|null $city = null,
+            public mixed|null $value = null,
+            public AddressDTO|null $address = null,
+        ) {
+        }
+    }
+
+You can specify arbitrary arguments in an arbitrary order by using the named argument syntax, and the ORM will try to match argument names with the selected column names.
+The syntax relies on the NAMED keyword, like so:
+
+.. code-block:: php
+
+    <?php
+    $query = $em->createQuery('SELECT NEW NAMED CustomerDTO(a.city, c.name) FROM Customer c JOIN c.address a');
+    $users = $query->getResult(); // array of CustomerDTO
+
+    // CustomerDTO => {name : 'SMITH', email: null, city: 'London', value: null}
+
+ORM will also give precedence to column aliases over column names :
+
+.. code-block:: php
+
+    <?php
+    $query = $em->createQuery('SELECT NEW NAMED CustomerDTO(c.name, CONCAT(a.city, ' ' , a.zip) AS value) FROM Customer c JOIN c.address a');
+    $users = $query->getResult(); // array of CustomerDTO
+
+    // CustomerDTO => {name : 'DOE', email: null, city: null, value: 'New York 10011'}
+
+To define a custom name for a DTO constructor argument, you can either alias the column with the ``AS`` keyword.
+
+The ``NAMED`` keyword must precede all DTO you want to instantiate :
+
+.. code-block:: php
+
+    <?php
+    $query = $em->createQuery('SELECT NEW NAMED CustomerDTO(c.name, NEW NAMED AddressDTO(a.street, a.city, a.zip) AS address) FROM Customer c JOIN c.address a');
+    $users = $query->getResult(); // array of CustomerDTO
+
+    // CustomerDTO => {name : 'DOE', email: null, city: null, value: 'New York 10011'}
+
+If two arguments have the same name, a ``DuplicateFieldException`` is thrown.
+If a field cannot be matched with a property name, a ``NoMatchingPropertyException`` is thrown. This typically happens when using functions without aliasing them.
+
 Using INDEX BY
 ~~~~~~~~~~~~~~
 
@@ -1627,7 +1684,7 @@ Select Expressions
     PartialObjectExpression ::= "PARTIAL" IdentificationVariable "." PartialFieldSet
     PartialFieldSet         ::= "{" SimpleStateField {"," SimpleStateField}* "}"
     NewObjectExpression     ::= "NEW" AbstractSchemaName "(" NewObjectArg {"," NewObjectArg}* ")"
-    NewObjectArg            ::= ScalarExpression | "(" Subselect ")" | NewObjectExpression
+    NewObjectArg            ::= (ScalarExpression | "(" Subselect ")" | NewObjectExpression) ["AS" AliasResultVariable]
 
 Conditional Expressions
 ~~~~~~~~~~~~~~~~~~~~~~~

src/Exception/DuplicateFieldException.php

@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\ORM\Exception;
+
+use LogicException;
+
+use function sprintf;
+
+class DuplicateFieldException extends LogicException implements ORMException
+{
+    public static function create(string $argName, string $columnName): self
+    {
+        return new self(sprintf('Name "%s" for "%s" already in use.', $argName, $columnName));
+    }
+}

src/Exception/NoMatchingPropertyException.php

@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\ORM\Exception;
+
+use LogicException;
+
+use function sprintf;
+
+class NoMatchingPropertyException extends LogicException implements ORMException
+{
+    public static function create(string $property): self
+    {
+        return new self(sprintf('Column name "%s" does not match any property name. Consider aliasing it to the name of an existing property.', $property));
+    }
+}

src/Internal/Hydration/AbstractHydrator.php

@@ -261,7 +261,7 @@ abstract protected function hydrateAllData(): mixed;
      */
     protected function gatherRowData(array $data, array &$id, array &$nonemptyComponents): array
     {
-        $rowData = ['data' => []];
+        $rowData = ['data' => [], 'newObjects' => []];
 
         foreach ($data as $key => $value) {
             $cacheKeyInfo = $this->hydrateColumnInfo($key);
@@ -282,10 +282,6 @@ protected function gatherRowData(array $data, array &$id, array &$nonemptyCompon
                         $value = $this->buildEnum($value, $cacheKeyInfo['enumType']);
                     }
 
-                    if (! isset($rowData['newObjects'])) {
-                        $rowData['newObjects'] = [];
-                    }
-
                     $rowData['newObjects'][$objIndex]['class']           = $cacheKeyInfo['class'];
                     $rowData['newObjects'][$objIndex]['args'][$argIndex] = $value;
                     break;
@@ -341,28 +337,22 @@ protected function gatherRowData(array $data, array &$id, array &$nonemptyCompon
         }
 
         foreach ($this->resultSetMapping()->nestedNewObjectArguments as $objIndex => ['ownerIndex' => $ownerIndex, 'argIndex' => $argIndex]) {
-            if (! isset($rowData['newObjects'][$objIndex])) {
+            if (! isset($rowData['newObjects'][$ownerIndex . ':' . $argIndex])) {
                 continue;
             }
 
-            $newObject = $rowData['newObjects'][$objIndex];
-            unset($rowData['newObjects'][$objIndex]);
+            $newObject = $rowData['newObjects'][$ownerIndex . ':' . $argIndex];
+            unset($rowData['newObjects'][$ownerIndex . ':' . $argIndex]);
 
-            $class = $newObject['class'];
-            $args  = $newObject['args'];
-            $obj   = $class->newInstanceArgs($args);
+            $obj = $newObject['class']->newInstanceArgs($newObject['args']);
 
             $rowData['newObjects'][$ownerIndex]['args'][$argIndex] = $obj;
         }
 
-        if (isset($rowData['newObjects'])) {
-            foreach ($rowData['newObjects'] as $objIndex => $newObject) {
-                $class = $newObject['class'];
-                $args  = $newObject['args'];
-                $obj   = $class->newInstanceArgs($args);
+        foreach ($rowData['newObjects'] as $objIndex => $newObject) {
+            $obj = $newObject['class']->newInstanceArgs($newObject['args']);
 
-                $rowData['newObjects'][$objIndex]['obj'] = $obj;
-            }
+            $rowData['newObjects'][$objIndex]['obj'] = $obj;
         }
 
         return $rowData;

src/Query/Parser.php

@@ -6,6 +6,8 @@
 
 use Doctrine\Common\Lexer\Token;
 use Doctrine\ORM\EntityManagerInterface;
+use Doctrine\ORM\Exception\DuplicateFieldException;
+use Doctrine\ORM\Exception\NoMatchingPropertyException;
 use Doctrine\ORM\Internal\Hydration\HydrationException;
 use Doctrine\ORM\Mapping\AssociationMapping;
 use Doctrine\ORM\Mapping\ClassMetadata;
@@ -15,6 +17,7 @@
 use ReflectionClass;
 
 use function array_intersect;
+use function array_key_exists;
 use function array_search;
 use function assert;
 use function class_exists;
@@ -30,6 +33,7 @@
 use function strrpos;
 use function strtolower;
 use function substr;
+use function trim;
 
 /**
  * An LL(*) recursive-descent parser for the context-free grammar of the Doctrine Query Language.
@@ -1734,20 +1738,26 @@ public function PartialObjectExpression(): AST\PartialObjectExpression
      */
     public function NewObjectExpression(): AST\NewObjectExpression
     {
-        $args = [];
+        $useNamedArguments =  false;
+        $args              = [];
+        $argFieldAlias     = [];
         $this->match(TokenType::T_NEW);
 
+        if ($this->lexer->isNextToken(TokenType::T_NAMED)) {
+            $this->match(TokenType::T_NAMED);
+            $useNamedArguments = true;
+        }
+
         $className = $this->AbstractSchemaName(); // note that this is not yet validated
         $token     = $this->lexer->token;
 
         $this->match(TokenType::T_OPEN_PARENTHESIS);
 
-        $args[] = $this->NewObjectArg();
+        $this->addArgument($args, $useNamedArguments);
 
         while ($this->lexer->isNextToken(TokenType::T_COMMA)) {
             $this->match(TokenType::T_COMMA);
-
-            $args[] = $this->NewObjectArg();
+            $this->addArgument($args, $useNamedArguments);
         }
 
         $this->match(TokenType::T_CLOSE_PARENTHESIS);
@@ -1764,29 +1774,71 @@ public function NewObjectExpression(): AST\NewObjectExpression
         return $expression;
     }
 
+    /** @param array<mixed> $args */
+    public function addArgument(array &$args, bool $useNamedArguments): void
+    {
+        $fieldAlias = null;
+
+        if ($useNamedArguments) {
+            $startToken = $this->lexer->lookahead?->position ?? 0;
+
+            $newArg = $this->NewObjectArg($fieldAlias);
+
+            $key = $fieldAlias ?? $newArg->field ?? null;
+
+            if ($key === null) {
+                throw NoMatchingPropertyException::create(trim(substr(
+                    ($this->query->getDQL() ?? ''),
+                    $startToken,
+                    ($this->lexer->lookahead->position ?? 0) - $startToken,
+                )));
+            }
+
+            if (array_key_exists($key, $args)) {
+                throw DuplicateFieldException::create($key, trim(substr(
+                    ($this->query->getDQL() ?? ''),
+                    $startToken,
+                    ($this->lexer->lookahead->position ?? 0) - $startToken,
+                )));
+            }
+
+            $args[$key] = $newArg;
+        } else {
+            $args[] = $this->NewObjectArg($fieldAlias);
+        }
+    }
+
     /**
-     * NewObjectArg ::= ScalarExpression | "(" Subselect ")" | NewObjectExpression
+     * NewObjectArg ::= (ScalarExpression | "(" Subselect ")" | NewObjectExpression) ["AS" AliasResultVariable]
      */
-    public function NewObjectArg(): mixed
+    public function NewObjectArg(string|null &$fieldAlias = null): mixed
     {
+        $fieldAlias = null;
+
         assert($this->lexer->lookahead !== null);
         $token = $this->lexer->lookahead;
         $peek  = $this->lexer->glimpse();
 
         assert($peek !== null);
+
+        $expression = null;
+
         if ($token->type === TokenType::T_OPEN_PARENTHESIS && $peek->type === TokenType::T_SELECT) {
             $this->match(TokenType::T_OPEN_PARENTHESIS);
             $expression = $this->Subselect();
             $this->match(TokenType::T_CLOSE_PARENTHESIS);
-
-            return $expression;
+        } elseif ($token->type === TokenType::T_NEW) {
+            $expression = $this->NewObjectExpression();
+        } else {
+            $expression = $this->ScalarExpression();
         }
 
-        if ($token->type === TokenType::T_NEW) {
-            return $this->NewObjectExpression();
+        if ($this->lexer->isNextToken(TokenType::T_AS)) {
+            $this->match(TokenType::T_AS);
+            $fieldAlias = $this->AliasIdentificationVariable();
         }
 
-        return $this->ScalarExpression();
+        return $expression;
     }
 
     /**

src/Query/ResultSetMapping.php

@@ -4,7 +4,6 @@
 
 namespace Doctrine\ORM\Query;
 
-use function array_merge;
 use function count;
 
 /**
@@ -552,25 +551,4 @@ public function addMetaResult(
 
         return $this;
     }
-
-    public function addNewObjectAsArgument(string|int $alias, string|int $objOwner, int $objOwnerIdx): static
-    {
-        $owner = [
-            'ownerIndex' => $objOwner,
-            'argIndex' => $objOwnerIdx,
-        ];
-
-        if (! isset($this->nestedNewObjectArguments[$owner['ownerIndex']])) {
-            $this->nestedNewObjectArguments[$alias] = $owner;
-
-            return $this;
-        }
-
-        $this->nestedNewObjectArguments = array_merge(
-            [$alias => $owner],
-            $this->nestedNewObjectArguments,
-        );
-
-        return $this;
-    }
 }

src/Query/SqlWalker.php

@@ -1510,6 +1510,7 @@ public function walkNewObject(AST\NewObjectExpression $newObjectExpression, stri
                     $this->newObjectStack[] = [$objIndex, $argIndex];
                     $sqlSelectExpressions[] = $e->dispatch($this);
                     array_pop($this->newObjectStack);
+                    $this->rsm->nestedNewObjectArguments[$columnAlias] = ['ownerIndex' => $objIndex, 'argIndex' => $argIndex];
                     break;
 
                 case $e instanceof AST\Subselect:
@@ -1563,10 +1564,6 @@ public function walkNewObject(AST\NewObjectExpression $newObjectExpression, stri
                 'objIndex'  => $objIndex,
                 'argIndex'  => $argIndex,
             ];
-
-            if ($objOwner !== null && $objOwnerIdx !== null) {
-                $this->rsm->addNewObjectAsArgument($objIndex, $objOwner, $objOwnerIdx);
-            }
         }
 
         return implode(', ', $sqlSelectExpressions);

src/Query/TokenType.php

@@ -89,4 +89,5 @@ enum TokenType: int
     case T_WHEN     = 254;
     case T_WHERE    = 255;
     case T_WITH     = 256;
+    case T_NAMED    = 257;
 }

tests/Tests/Models/CMS/CmsAddressDTONamedArgs.php

@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Tests\Models\CMS;
+
+class CmsAddressDTONamedArgs
+{
+    public function __construct(
+        public string|null $country = null,
+        public string|null $city = null,
+        public string|null $zip = null,
+        public CmsAddressDTO|string|null $address = null,
+    ) {
+    }
+}