mysql - 使用子查询和 case When 语句对查询进行序列化

Question

我在我的项目中使用sequalize ORM来处理SQL查询。但是我已经使用了简单的查询，现在我想将这个复杂的SQL原始查询转换为sequalize ORM。

    SELECT
    u.uid
FROM
    users u
WHERE
    u.uid NOT IN(
        SELECT 
DISTINCT
            CASE
        WHEN uid = 3 THEN
            blocked_uid
        WHEN uid <> 3 THEN
            uid
        END AS 'uid'
        FROM
            user_block
        WHERE
            `status` = 'ACTIVE'
        AND(
            (uid IN(4, 5) AND blocked_uid = 3)
            OR(uid = 3 AND blocked_uid IN(4, 5))
        )
    )
AND u.uid IN(4, 5)

Answer 1

您可以使用查询函数并绑定(bind)参数或使用 WHERE/IN 子句中的值的替换，如文档 http://docs.sequelizejs.com/en/latest/docs/raw-queries/#replacements 所示。 。

例如:

sequelize.query('SELECT * FROM projects WHERE status = ?',
{ replacements: ['active'], type: sequelize.QueryTypes.SELECT 
}).then(function(projects) {
  console.log(projects)
})