prisma

Prisma js 查询随机结果

2022-12-05  本文已影响0人  思考蛙

原生SQL 方案

prisma.users.findMany({
    orderBy: raw`random()`,
    take: 10
});

随机field方案

async handle(req: Request, res: Response) {
        const randomPick = (values: string[]) => {
            const index = Math.floor(Math.random() * values.length);
            return values[index];
        }
        const itemCount = await prismaClient.book.count();

        const randomNumber = (min: number, max: number) => {
            return Math.floor(Math.random() * (max - min + 1)) + min;
        }

        const orderBy = randomPick(['book_id', 'book_name', 'book_uuid', `book_synopsis`, `book_date_updated`, `book_date_created`]);
        const orderDir = randomPick([`asc`, `desc`]);

        let result = await prismaClient.book.findMany({
            orderBy: { [orderBy]: orderDir },
            take: 1,
            skip: randomNumber(0, itemCount - 1),
            select: {
                book_id: true,
                book_name: true,
                book_synopsis: true,
            }
        })

        res.send(result)
  }
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