Express pagination lanjutan penabahasan sebelumnya,
node module dan database tidak disertakan di github, jadi setelah
git clone
npm install
npx prisma db push
error environment tidak ditemukan, kita harus buat dulu envnya.
//.env
DATABASE_URL = "file:./db.sqlite"
PORT= 9000
coba kita jalankan kembali
npx prisma db push
sekarang kita jalankan server
npm run dev
server sudah berhasil berjalan...
kalau kita hit kembali dengan data yang sama maka akan error karena username dan email uniq.
//package.json
{
"name": "express_faker",
"version": "1.0.0",
"description": "",
"main": "/src/index.js",
"scripts": {
"dev": "nodemon --exec babel-node ./src/index.js",
"users_seed" : "babel-node ./src/seeds/users_seed.js"
},
"keywords": [],
"author": "",
"license": "ISC",
"dependencies": {
"@prisma/client": "^4.7.1",
"dotenv": "^16.0.3",
"express": "^4.18.2",
"prisma": "^4.7.1"
},
"devDependencies": {
"@babel/core": "^7.20.5",
"@babel/node": "^7.20.5",
"@babel/preset-env": "^7.20.2",
"@faker-js/faker": "^7.6.0"
}
}
dipackage json kita sudah tambahkan user_seed untuk menambahkan 100 data faker.
matikan servernya dan ketikkan
npm run users_seed
sekarang dua server yang berjalan.
npm run users_seed
npm run dev
kalau kita hit di tester.rest maka akan produksi 100 data plus data input yang kita lakukan sebelumnya, oleh karenaya kita akan membuat pagination untuk memudah kinerja load data. kita akan ke controller user fokus pada user read
di findmany kasih objek take=10
//user_controller.js
import db from "../../prisma/connection"
import { request, response } from "express"
// create user
export const user_create = async (req = request, res = response) => {
try {
const data = await req.body
const createUser = await db.users.create({
data: data
})
return res.status(201).json({
success: true,
message: "User berhasil di buat"
})
} catch (error) {
return res.status(500).json({
success: false,
error: error.message
})
}
}
// user read
export const user_read = async (req = request, res = response) => {
try {
const result = await db.users.findMany({
take : 10 //tambahkan ini
})
return res.status(200).json({
success: true,
data: result
})
} catch (error) {
return res.status(500).json({
success: false,
error: error.message
})
}
}
sekarang ke tester.rest kalau kita send request untuk read data, hasilya kita hanya akan melihat 10 data saja
kalau kita kasih take 10 dan skip 10 maka akan menampilkan 10 data di setiap halaman nnya.
//user_controller.js
import db from "../../prisma/connection"
import { request, response } from "express"
// create user
export const user_create = async (req = request, res = response) => {
try {
const data = await req.body
const createUser = await db.users.create({
data: data
})
return res.status(201).json({
success: true,
message: "User berhasil di buat"
})
} catch (error) {
return res.status(500).json({
success: false,
error: error.message
})
}
}
// user read
export const user_read = async (req = request, res = response) => {
try {
const result = await db.users.findMany({
take : 10,
skip:10
})
return res.status(200).json({
success: true,
data: result
})
} catch (error) {
return res.status(500).json({
success: false,
error: error.message
})
}
}
selanjutnya kita akan buat variable untuk page
//user_controller.js
import db from "../../prisma/connection"
import { request, response } from "express"
// create user
export const user_create = async (req = request, res = response) => {
try {
const data = await req.body
const createUser = await db.users.create({
data: data
})
return res.status(201).json({
success: true,
message: "User berhasil di buat"
})
} catch (error) {
return res.status(500).json({
success: false,
error: error.message
})
}
}
// user read
export const user_read = async (req = request, res = response) => {
try {
// let page =1
// let limit = 10
let {page=1, limit=10}= req.query //menghasilkan string
let skip = (page-1) * limit
const result = await db.users.findMany({
//take : 10,
take : parseInt(limit),
//skip:10
skip:skip
})
return res.status(200).json({
success: true,
data: result
})
} catch (error) {
return res.status(500).json({
success: false,
error: error.message
})
}
}
sekarang coba kita hit, tanpa query kita sebelumnya sudah memberikan nilai default 1-10.
berhasil
//user_controller.js
import db from "../../prisma/connection"
import { request, response } from "express"
// create user
export const user_create = async (req = request, res = response) => {
try {
const data = await req.body
const createUser = await db.users.create({
data: data
})
return res.status(201).json({
success: true,
message: "User berhasil di buat"
})
} catch (error) {
return res.status(500).json({
success: false,
error: error.message
})
}
}
// user read
export const user_read = async (req = request, res = response) => {
try {
// let page =1
// let limit = 10
let {page=1, limit=10}= req.query //menghasilkan string
let skip = (page-1) * limit
const result = await db.users.findMany({
//take : 10,
take : parseInt(limit),
//skip:10
skip:skip
})
//informasi total data keseluruhan
const resultCount = await db.users.count()//integer jumlah total data user
//generated total page
const totalPage= Math.ceil(resultCount/limit)
return res.status(200).json({
success: true,
current_page: page - 0, //ini -0 merubah menjadi integer
total_page : totalPage,
total_data : resultCount,
data: result
})
} catch (error) {
return res.status(500).json({
success: false,
error: error.message
})
}
}
code di atas akan menmpikan jumlah page, current page, total data dan total page.
berhasil.
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