addSql('DROP INDEX unique_quartal'); $this->addSql('CREATE UNIQUE INDEX unique_quartal ON contacts (phone_number, due_quartal) WHERE due_quartal IS NOT NULL'); } public function down(Schema $schema): void { // this down() migration is auto-generated, please modify it to your needs $this->addSql('CREATE SCHEMA public'); $this->addSql('DROP INDEX unique_quartal'); $this->addSql('CREATE INDEX unique_quartal ON contacts (phone_number, due_quartal) WHERE (due_quartal IS NOT NULL)'); } }