我希望能够构建一个查询,该查询接受一串uuid并用逗号将其吐出以生成以下sql语句:
uuid
4506ef72-aa17-452b-9456-38d11c71897b,bd46629d-0e8c-4d70-874a-76bfade8ef14,b0c11580-7cde-4a4e-ba0a-30f9de52e3b5
.sql
SELECT * FROM my-table WHERE uuid="4506ef72-aa17-452b-9456-38d11c71897b" OR bd46629d-0e8c-4d70-874a-76bfade8ef14 OR b0c11580-7cde-4a4e-ba0a-30f9de52e3b5 ORDER BY created DESC;
我尝试在以下方法中使用sqlkorma生成此查询,但是我在生成WHERE子句时遇到问题。
(defn fetch [uuid]
(->
(korma/select* :my-table)
(korma/order :created :DESC)
(as-> query
(if (not= uuid nil)
(for [id (str/split uuid #",")]
(korma/where query {:uuid id}))
query))
(korma/query-only))
)
试一试:
(defn fetch [uuid]
(-> (korma/select* :my-table)
(korma/order :created :DESC)
(korma/where {:uuid [in (str/split uuid #",")]})
(korma/query-only)))
这不是OR
条件,而是使用IN
。
(println (korma/as-sql (fetch "x,x,x")))
SELECT "my-table".* FROM "my-table" WHERE ("my-table"."uuid" IN (?, ?, ?)) ORDER BY "my-table"."created" DESC