Convert union types to dynamic for Dart

composer.json

@@ -12,6 +12,7 @@
         "test:update-snapshots": "vendor/bin/phpunit tests -d --update-snapshots",
         "cs:src": "vendor/bin/php-cs-fixer fix src",
         "cs:tests": "vendor/bin/php-cs-fixer fix tests",
+        "cs": ["@cs:src", "@cs:tests"],
         "phpstan": "vendor/bin/phpstan analyse src tests bin",
         "php-parser-dump": "vendor/bin/php-parse tests/fixtures/NestedDto.php"
     },

src/Language/Dart/DartGenerator.php

@@ -101,7 +101,9 @@ private function getDartTypeFromPhp(PhpTypeInterface $type, DtoType $dto, DtoLis
     {
         if ($type instanceof PhpUnionType) {
             Assert::greaterThan($type->getTypes(), 2, "Dart does not support union types");
-            Assert::true($type->isNullable(), "Dart only support nullable union types");
+            if (!$type->isNullable()) {
+                return $this->getDartTypeFromPhp(PhpBaseType::mixed(), $dto, $dtoList);
+            }
             $notNullType = $type->getFirstNotNullType();
             return sprintf('%s?', $this->getDartTypeFromPhp($notNullType, $dto, $dtoList));
         }

tests/DartGeneratorTest.php

@@ -64,6 +64,7 @@ class User
     /** @var User[] */
     public array $friends;
     public ColorEnum $themeColor;
+    public string|int $stringOrInteger;
 }
 CODE;
 

tests/__snapshots__/DartGeneratorTest__testDart__1.dart

@@ -41,11 +41,13 @@ class User {
   final User? bestFriend;
   final List<User> friends;
   final ColorEnum themeColor;
+  final dynamic stringOrInteger;
 
   User({
     required this.id,
     this.bestFriend,
     required this.friends,
     required this.themeColor,
+    required this.stringOrInteger,
   });
 }