@SpringBootTest
class ArticleServiceTest {

    @Autowired
    ArticleService articleService;

    @Test
    void testChain() {
        List<Article> articles = articleService.queryChain()
            .select(ARTICLE.ALL_COLUMNS)
            .from(ARTICLE)
            .where(ARTICLE.ID.ge(100))
            .list();
    }
}

List<Article> articles = QueryChain.of(mapper)
    .select(ARTICLE.ALL_COLUMNS)
    .from(ARTICLE)
    .where(ARTICLE.ID.ge(100))
    .list();

@Test
public void testUpdateChain1() {
    UpdateChain.of(Account.class)
        .set(Account::getUserName, "張三")
        .setRaw(Account::getAge, "age + 1")
        .where(Account::getId).eq(1)
        .update();
}

UPDATE `tb_account` SET `user_name` = '張三' , `age` = age + 1
WHERE `id` = 1

@Test
public void testUpdateChain2() {

    //更新數(shù)據(jù)
    UpdateChain.of(Account.class)
        .set(Account::getAge, ACCOUNT.AGE.add(1))
        .where(Account::getId).ge(100)
        .and(Account::getAge).eq(18)
        .update();

    //查詢(xún)所有數(shù)據(jù)并打印
    QueryChain.of(accountMapper)
        .where(Account::getId).ge(100)
        .and(Account::getAge).eq(18)
        .list()
        .forEach(System.out::println);
}

UPDATE `tb_account` SET `age` = `age` + 1
WHERE  `id` >= 100 AND `age` = 18

List<Article> articles = articleService.queryChain()
    .select(ARTICLE.ALL_COLUMNS)
    .from(ARTICLE)
    .where(ARTICLE.ID.ge(100))
    .list();

Article article = articleService.queryChain()
    .select(ARTICLE.ALL_COLUMNS)
    .from(ARTICLE)
    .where(ARTICLE.ID.ge(100))
    .limit(1)
    .one();

public class ArticleVo {

    private Long id;
    private Long accountId;
    private String title;
    private String content;

    //評(píng)論量最多的內(nèi)容
    private Long maxComments;

    //getter setter
}

ArticleVo articleVo = articleService.queryChain()
    .select(
        ARTICLE.ALL_COLUMNS,
        max(ARTICLE.comments).as(ArticleVo::maxComments)
    ).from(ARTICLE)
    .where(ARTICLE.ID.ge(100))
    .limit(1)
    .oneAs(ArticleVo.class);

public class ArticleVo {

    private Long id;
    private Long accountId;
    private String title;
    private String content;

    //文章和分類(lèi)的 多對(duì)多 關(guān)系配置
    @RelationManyToMany(
        joinTable = "tb_article_category_mapping", // 中間表
        selfField = "id", joinSelfColumn = "article_id",
        targetField = "id", joinTargetColumn = "category_id"
    )
    private List<ArticleCategory> categories;

    //getter setter
}

ArticleVo articleVo = articleService.queryChain()
    .select()
    .from(ARTICLE)
    .where(ARTICLE.ID.ge(100))
    .limit(1)
    .oneWithRelationsAs(ArticleVo.class);

// 新增 Row 構(gòu)建
DbChain.table("tb_account")
    .setId(RowKey.AUTO)
    .set("user_name", "zhang san")
    .set("age", 18)
    .set("birthday", new Date())
    .save();

// 查詢(xún) QueryWrapper 構(gòu)建
DbChain.table("tb_account")
    .select("id", "user_name", "age", "birthday")
    .where("age > ?", 18)
    .list()
    .forEach(System.out::println);