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示例堆栈:Spring Data R2dbc 1.0.0.RELEASE、R2dbc Mssql 0.8,完整代码在这里

初始化脚本:

use tempdb;

IF OBJECT_ID(N'dbo.posts', N'U') IS NULL
BEGIN
    CREATE TABLE posts (
        id BIGINT NOT NULL IDENTITY(1,1) PRIMARY KEY,
        title VARCHAR (50) NOT NULL,
        content VARCHAR (50) NOT NULL,
        createdAt DATETIME,
        updatedAt DATETIME
    )
END;

保存数据并从中获取生成的密钥时DataInitializer

@Component
@Slf4j
class DataInitializer {

    private final DatabaseClient databaseClient;

    public DataInitializer(DatabaseClient databaseClient) {
        this.databaseClient = databaseClient;
    }

    @EventListener(value = ContextRefreshedEvent.class)
    public void init() {
        log.info("start data initialization...");
        this.databaseClient.delete().from("posts")
                .then().
                and(

                        this.databaseClient.insert()
                                .into("posts")
                                //.nullValue("id", Integer.class)
                                .value("title", "First post title")
                                .value("content", "Content of my first post")
                                .map((r, m) -> r.get( 0, BigDecimal.class)).all()
                                .log()
                )
                .thenMany(
                        this.databaseClient.select()
                                .from("posts")
                                .orderBy(Sort.by(desc("id")))
                                .as(Post.class)
                                .fetch()
                                .all()
                                .log()
                )
                .subscribe(null, null, () -> log.info("initialization is done..."));
    }

}

如果我在行中使用IntegerorLong而不是,它将引发错误,指示无法解码类型 [java.lang.Long] 的值,名称 [GENERATED_KEYS] 服务器类型 [numeric],它不是架构脚本中定义的,我必须使用 a才能使其工作。BigDecimal.map((r, m) -> r.get( 0, BigDecimal.class)).all()bigintBigDecimal

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