doctrine / orm

            $mapping['joinTableColumns'] = [];

            foreach ($mapping['joinTable']['joinColumns'] as &$joinColumn) {

                if (empty($joinColumn['name'])) {

                    $joinColumn['name'] = $this->namingStrategy->joinKeyColumnName($mapping['sourceEntity'], $joinColumn['referencedColumnName']);

                }

                if (empty($joinColumn['referencedColumnName'])) {

                    $joinColumn['referencedColumnName'] = $this->namingStrategy->referenceColumnName();

                }

                if ($joinColumn['name'][0] === '`') {

                    $joinColumn['name']   = trim($joinColumn['name'], '`');

                    $joinColumn['quoted'] = true;

                }

                if ($joinColumn['referencedColumnName'][0] === '`') {

                    $joinColumn['referencedColumnName'] = trim($joinColumn['referencedColumnName'], '`');

                    $joinColumn['quoted']               = true;

                }

                if (isset($joinColumn['onDelete']) && strtolower($joinColumn['onDelete']) == 'cascade') {

                    $mapping['isOnDeleteCascade'] = true;

                }

                $mapping['relationToSourceKeyColumns'][$joinColumn['name']] = $joinColumn['referencedColumnName'];

                $mapping['joinTableColumns'][] = $joinColumn['name'];

            }

            foreach ($mapping['joinTable']['inverseJoinColumns'] as &$inverseJoinColumn) {

                if (empty($inverseJoinColumn['name'])) {

                $mapping['joinTableColumns'][] = $joinColumn['name'];

            }

            foreach ($mapping['joinTable']['inverseJoinColumns'] as &$inverseJoinColumn) {

                if (empty($inverseJoinColumn['name'])) {

                    $inverseJoinColumn['name'] = $this->namingStrategy->joinKeyColumnName($mapping['targetEntity'], $inverseJoinColumn['referencedColumnName']);

                }

                if (empty($inverseJoinColumn['referencedColumnName'])) {

                    $inverseJoinColumn['referencedColumnName'] = $this->namingStrategy->referenceColumnName();

                }

                if ($inverseJoinColumn['name'][0] === '`') {

                    $inverseJoinColumn['name']   = trim($inverseJoinColumn['name'], '`');

                    $inverseJoinColumn['quoted'] = true;

                }

                if ($inverseJoinColumn['referencedColumnName'][0] === '`') {

                    $inverseJoinColumn['referencedColumnName']  = trim($inverseJoinColumn['referencedColumnName'], '`');

                    $inverseJoinColumn['quoted']                = true;

                }

                if (isset($inverseJoinColumn['onDelete']) && strtolower($inverseJoinColumn['onDelete']) == 'cascade') {

                    $mapping['isOnDeleteCascade'] = true;

                }

                $mapping['relationToTargetKeyColumns'][$inverseJoinColumn['name']] = $inverseJoinColumn['referencedColumnName'];

                $mapping['joinTableColumns'][] = $inverseJoinColumn['name'];

            }

        }

        $mapping['orphanRemoval'] = isset($mapping['orphanRemoval']) && $mapping['orphanRemoval'];