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application/Espo/ORM/Mapper/Helper.php

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+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\ORM\Mapper;
+
+use Espo\ORM\Entity;
+use Espo\ORM\Metadata;
+
+use Espo\ORM\Name\Attribute;
+use RuntimeException;
+
+class Helper
+{
+    public function __construct(private Metadata $metadata)
+    {}
+
+    /**
+     * @return array{
+     *   key: string,
+     *   foreignKey: string,
+     *   foreignType?: string,
+     *   nearKey?: string,
+     *   distantKey?: string,
+     *   typeKey?: string,
+     * }
+     */
+    public function getRelationKeys(Entity $entity, string $relationName): array
+    {
+        $entityType = $entity->getEntityType();
+
+        $defs = $this->metadata->getDefs()
+            ->getEntity($entityType)
+            ->getRelation($relationName);
+
+        $type = $defs->getType();
+
+        switch ($type) {
+
+            case Entity::BELONGS_TO:
+                $key = $defs->hasKey() ?
+                    $defs->getKey() :
+                    $relationName . 'Id';
+
+                $foreignKey = $defs->hasForeignKey() ?
+                    $defs->getForeignKey() :
+                    Attribute::ID;
+
+                return [
+                    'key' => $key,
+                    'foreignKey' => $foreignKey,
+                ];
+
+            case Entity::HAS_MANY:
+            case Entity::HAS_ONE:
+                $key = $defs->hasKey() ? $defs->getKey() : Attribute::ID;
+
+                $foreign = $defs->hasForeignRelationName() ?
+                    $defs->getForeignRelationName() :
+                    null;
+
+                $foreignKey = $defs->hasForeignKey() ?
+                    $defs->getForeignKey() :
+                    null;
+
+                if (!$foreignKey && $foreign) {
+                    $foreignKey = $foreign . 'Id';
+                }
+
+                if (!$foreignKey) {
+                    $foreignKey = lcfirst($entity->getEntityType()) . 'Id';
+                }
+
+                return [
+                    'key' => $key,
+                    'foreignKey' => $foreignKey,
+                ];
+
+            case Entity::HAS_CHILDREN:
+                $key = $defs->hasKey() ? $defs->getKey() : Attribute::ID;
+
+                $foreignKey = $defs->hasForeignKey() ?
+                    $defs->getForeignKey() :
+                    'parentId';
+
+                $foreignType = $defs->getParam('foreignType') ?? 'parentType';
+
+                return [
+                    'key' => $key,
+                    'foreignKey' => $foreignKey,
+                    'foreignType' => $foreignType,
+                ];
+
+            case Entity::MANY_MANY:
+                $key = $defs->hasKey() ?
+                    $defs->getKey() :
+                    Attribute::ID;
+
+                $foreignKey = $defs->hasForeignKey() ?
+                    $defs->getForeignKey() :
+                    Attribute::ID;
+
+                $nearKey = $defs->hasMidKey() ?
+                    $defs->getMidKey() :
+                    lcfirst($entityType) . 'Id';
+
+                $distantKey = $defs->hasForeignMidKey() ?
+                    $defs->getForeignMidKey() :
+                    lcfirst($defs->getForeignEntityType()) . 'Id';
+
+                return [
+                    'key' => $key,
+                    'foreignKey' => $foreignKey,
+                    'nearKey' => $nearKey,
+                    'distantKey' => $distantKey,
+                ];
+
+            case Entity::BELONGS_TO_PARENT:
+                $key = $relationName . 'Id';
+                $typeKey = $relationName . 'Type';
+
+                return [
+                    'key' => $key,
+                    'typeKey' => $typeKey,
+                    'foreignKey' => Attribute::ID,
+                ];
+        }
+
+        throw new RuntimeException("Relation type '{$type}' not supported for 'getKeys'.");
+    }
+}