Drizzle | 使用不同值更新多个行
PostgreSQL
MySQL
SQLite
要在一个请求中实现对多个行进行不同值的更新,可以使用 sql
操作符结合 case
语句和 .update().set()
方法,如下所示:
import { SQL, inArray, sql } from 'drizzle-orm';
import { users } from './schema';
const db = drizzle(...);
const inputs = [
{
id: 1,
city: 'New York',
},
{
id: 2,
city: 'Los Angeles',
},
{
id: 3,
city: 'Chicago',
},
];
// 确保 inputs 数组不为空
if (inputs.length === 0) {
return;
}
const sqlChunks: SQL[] = [];
const ids: number[] = [];
sqlChunks.push(sql`(case`);
for (const input of inputs) {
sqlChunks.push(sql`when ${users.id} = ${input.id} then ${input.city}`);
ids.push(input.id);
}
sqlChunks.push(sql`end)`);
const finalSql: SQL = sql.join(sqlChunks, sql.raw(' '));
await db.update(users).set({ city: finalSql }).where(inArray(users.id, ids));
update users set "city" =
(case when id = 1 then 'New York' when id = 2 then 'Los Angeles' when id = 3 then 'Chicago' end)
where id in (1, 2, 3)