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Prisma学习记录1

宁静的猫 2024-04-26 阅读 24

0.搭建prisma项目

1.配置env

DATABASE_URL="postgresql://johndoe:randompassword@localhost:5432/mydb?schema=public"
        注解:"数据库://用户名:密码@地址:端口号/要连接的数据库"
例:DATABASE_URL="mysql://root:123456@localhost:3306/prismatest2"

2.建表

generator client {
  provider = "prisma-client-js"
}

datasource db {
  provider = "mysql"    //这里改自己的数据库
  url      = env("DATABASE_URL")
}

model user{    //建一个user表
  id        Int      @id   @default(autoincrement()) @db.UnsignedInt    //主键  自增  非负
  name      String     //不可为空
  avatar    String?    //可以为空
  createdAt DataTime @default(now())    //日期字段,默认当前日期
  updatedAt DateTime @updatedAd           //同上
  content   String   @db.Text    //文本
}

3.运行并生成迁移文件

npx prisma migrate dev

 Enter a name for the new migration:        (写不写都行)

3.5.创建多表关联模型

model user {
  id       Int       @id @default(autoincrement()) @db.UnsignedInt
  articles article[]
}

model article {
  user   user? @relation(fields: [userId], references: [id])
  userId Int?  @db.UnsignedInt
}

        如果关联表里没自动补全代码,终端执行下面的代码

npx prisma format

4.数据填充

        package.json配置

"prisma":{
    "seed": "ts-node prisma/seed.ts"
  },

        prisma同级目录下创建seed.ts

        seed.ts

import { PrismaClient } from "@prisma/client"

const prisma = new PrismaClient();

async function run(){
    await prisma.user.create({
        data:{
            email:"afafa"
            password:"fafaf"
        }
    })
}
run();

5.使用mock.js进行数据填充

import { PrismaClient } from "@prisma/client"
import { Random } from "mockjs"

const prisma = new PrismaClient();

async function run(){
    await prisma.user.create({
        data:{
            email: Random.string()
            password: Random.string()
        }
    })
}
run();

        填充数据输入

npx prisma migrate reset

6.循环创建多个

import { PrismaClient } from "@prisma/client"
import { Random } from "mockjs"

const prisma = new PrismaClient();

async function run(){
    for(let i = 0li<29;i++){
        await prisma.user.create({
            data:{
                email: Random.string()
                password: Random.string()
            }
        })
    }
}
run();

7.通过helper帮助函数简化操作

        可以单独创建一个seeds文件夹,里面就放创建表数据的ts文件

        seeds

                article.ts

                user.ts

        seed.ts

        然后seed.ts里面写

import { article } from "./seeds/article"
import { user } from "./seeds/user"

async function run(){
    user();
    article();
}
run()

        helper

import { PrismaClient } from "@prisma/client";
const prisma = new PrismaClient();

export async function create( count: 1 , callback: (prisma: PrismaClient) => void){
    for(let i = 0;i < count;i++){
        callback(prisma)
    }
}

        其他函数调用

import { PrismaClient } from "@prisma/client"
import { Random } from "mockjs"
import { create } from "../helper"

const prisma = new PrismaClient();

async function run(){
    create(30 , async (prisma: PrismaClient)=>{
        await prisma.user.create({
            data:{
                email: Random.string()
                password: Random.string()
            }
        })
    })
}
run();

8.填充的异步阻塞(没听懂,后期会补充)

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