[英]Remove all items in table with Prisma2 and Jest
我想知道如何使用 Prisma2 和 Jest 删除表中的所有项目?
我阅读了CRUD 文档并尝试使用:
user.test.js
....
import { PrismaClient } from "@prisma/client"
beforeEach(async () => {
const prisma = new PrismaClient()
await prisma.user.deleteMany({})
})
...
但我有一个错误:
Invalid `prisma.user.deleteMany()` invocation:
The change you are trying to make would violate the required relation 'PostToUser' between the `Post` and `User` models.
我的数据库
CREATE TABLE User (
id INTEGER PRIMARY KEY AUTO_INCREMENT NOT NULL,
name VARCHAR(255),
email VARCHAR(255) UNIQUE NOT NULL,
password VARCHAR(255) NOT NULL
);
CREATE TABLE Post (
id INTEGER PRIMARY KEY AUTO_INCREMENT NOT NULL,
title VARCHAR(255) NOT NULL,
createdAt TIMESTAMP NOT NULL DEFAULT now(),
content TEXT,
published BOOLEAN NOT NULL DEFAULT false,
fk_user_id INTEGER NOT NULL,
CONSTRAINT `fk_user_id` FOREIGN KEY (fk_user_id) REFERENCES User(id) ON DELETE CASCADE
);
模式棱镜
model Post {
content String?
createdAt DateTime @default(now())
fk_user_id Int
id Int @default(autoincrement()) @id
published Boolean @default(false)
title String
author User @relation(fields: [fk_user_id], references: [id])
@@index([fk_user_id], name: "fk_user_id")
}
model User {
email String @unique
id Int @default(autoincrement()) @id
name String?
password String @default("")
Post Post[]
Profile Profile?
}
您违反了Post
和User
之间的外键约束。 在删除用户的Posts
之前,您不能删除User
beforeEach(async () => {
const prisma = new PrismaClient()
await prisma.post.deleteMany({where: {...}}) //delete posts first
await prisma.user.deleteMany({})
})
或者在外键上设置 CASCADE 删除,这样当你删除一个用户时,它的帖子会被自动删除
这是另一种方法,这将删除所有行及其相关行,也会重置 ID。 通过这种方式,您可以遍历所有表并且顺序无关紧要。
prisma.$executeRaw(`TRUNCATE TABLE ${table} RESTART IDENTITY CASCADE;`)
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