improved support for single table inheritance

src/Compiler.php

@@ -10,6 +10,7 @@
 
 use Cycle\ORM\Schema;
 use Cycle\Schema\Definition\Entity;
+use Doctrine\Common\Inflector\Inflector;
 use Spiral\Database\Exception\CompilerException;
 
 final class Compiler
@@ -86,7 +87,7 @@ protected function compute(Registry $registry, Entity $entity)
         // table inheritance
         foreach ($registry->getChildren($entity) as $child) {
             $this->result[$child->getClass()] = [Schema::ROLE => $entity->getRole()];
-            $schema[Schema::CHILDREN][] = $child->getClass();
+            $schema[Schema::CHILDREN][$this->childAlias($child)] = $child->getClass();
         }
 
         ksort($schema);
@@ -171,4 +172,16 @@ protected function getPrimary(Entity $entity): string
 
         throw new CompilerException("Entity `{$entity->getRole()}` must have defined primary key");
     }
+
+    /**
+     * Return the unique alias for the child entity.
+     *
+     * @param Entity $entity
+     * @return string
+     */
+    protected function childAlias(Entity $entity): string
+    {
+        $r = new \ReflectionClass($entity->getClass());
+        return Inflector::classify($r->getShortName());
+    }
 }

src/Generator/RenderTables.php

@@ -8,6 +8,7 @@
 
 namespace Cycle\Schema\Generator;
 
+use Cycle\ORM\Mapper\Mapper;
 use Cycle\Schema\Definition\Entity;
 use Cycle\Schema\GeneratorInterface;
 use Cycle\Schema\Registry;
@@ -70,6 +71,10 @@ protected function compute(Registry $registry, Entity $entity)
             $column->render($table->column($field->getColumn()));
         }
 
+        if ($registry->getChildren($entity) !== []) {
+            $table->string(Mapper::ENTITY_TYPE, 32);
+        }
+
         if (count($primaryKeys)) {
             $table->setPrimaryKeys($primaryKeys);
         }