sminnee / silverstripe-framework

        }

        // If we haven't been written yet, we can't save these relations, so use a list that handles this case

        if (!$this->ID) {

            if (!isset($this->unsavedRelations[$componentName])) {

                $this->unsavedRelations[$componentName] =

                    new UnsavedRelationList($this->class, $componentName, $componentClass);

            }

            return $this->unsavedRelations[$componentName];

        }

        // Determine type and nature of foreign relation

        $joinField = $schema->getRemoteJoinField(static::class, $componentName, 'has_many', $polymorphic);

            = $manyManyComponent;

        // If we haven't been written yet, we can't save these relations, so use a list that handles this case

        if (!$this->ID) {

            if (!isset($this->unsavedRelations[$componentName])) {

                $this->unsavedRelations[$componentName] =

                    new UnsavedRelationList($parentClass, $componentName, $componentClass);

            }

            return $this->unsavedRelations[$componentName];

        }

        $extraFields = $schema->manyManyExtraFieldsForComponent(static::class, $componentName) ?: array();

        /** @var RelationList $result */