Persistensi Entitas Baru Terstandarisasi Di React.Js Di Express.Js Dan React.Js — Part 6

Membangun aplikasi web di era modern memerlukan pondasi yang kokoh. Framework modern memberikan fleksibilitas luar biasa bagi developer untuk menghadirkan fitur kompleks secara cepat tanpa mengabaikan aspek keamanan dan keandalan sistem.

Tahapan Implementasi & Walkthrough Kode

Berikut adalah langkah demi langkah teknis yang dapat Anda ikuti langsung pada codebase Anda:

Tahap 1: Penulisan Kode & Konfigurasi

//import hook useState from react
import { useState } from 'react';

//import component Bootstrap React
import { Card, Container, Row, Col , Form, Button, Alert } from 'react-bootstrap';

//import axios
import axios from 'axios';

//import hook history dari react router dom
import { useHistory } from "react-router-dom";

function CreatePost() {

    //state
    const [title, setTitle] = useState('');
    const [content, setContent] = useState('');

    //state validation
    const [validation, setValidation] = useState({});

    //history
    const history = useHistory();

    //method "storePost"
    const storePost = async (e) => {
        e.preventDefault();
        
        //send data to server
        await axios.post('http://localhost:3000/api/posts/store', {
            title: title,
            content: content
        })
        .then(() => {

            //redirect
            history.push('/posts');

        })
        .catch((error) => {

            //assign validation on state
            setValidation(error.response.data);
        })
        
    };

    return (
        <Container className="mt-3">
            <Row>
                <Col md="{12}">
                    <Card className="border-0 rounded shadow-sm">
                        <Card.Body>
                        
                            {
                                validation.errors &&
                                    <Alert variant="danger">
                                        <ul class="mt-0 mb-0">
                                            { validation.errors.map((error, index) => (
                                                <li key={index}>{ `${error.param} : ${error.msg}` }</li>
                                            )) }
                                        </ul>
                                    </Alert>
                            }
                            
                            <Form onSubmit={ storePost }>
                                <Form.Group className="mb-3" controlId="formBasicEmail">
                                    <Form.Label>TITLE</Form.Label>
                                    <Form.Control type="text" value={title} onChange={(e) => setTitle(e.target.value)} placeholder="Masukkan Title" />
                                </Form.Group>

                                <Form.Group className="mb-3" controlId="formBasicPassword">
                                    <Form.Label>CONTENT</Form.Label>
                                    <Form.Control as="textarea" rows={3} value={content} onChange={(e) => setContent(e.target.value)} placeholder="Masukkan Content" />
                                </Form.Group>

                                <Button variant="primary" type="submit">
                                    SIMPAN
                                </Button>
                            </Form>
                        </Card.Body>
                    </Card>
                </Col>
            </Row>
        </Container>
    );
}

export default CreatePost;

Tahap 2: Penulisan Kode & Konfigurasi

//import hook useState from react
import { useState } from 'react';

Tahap 3: Penulisan Kode & Konfigurasi

//import component Bootstrap React
import { Card, Container, Row, Col , Form, Button, Alert } from 'react-bootstrap';

Tahap 4: Penulisan Kode & Konfigurasi

//import axios
import axios from 'axios';

Tahap 5: Penulisan Kode & Konfigurasi

//import hook history dari react router dom
import { useHistory } from "react-router-dom";

Tahap 6: Penulisan Kode & Konfigurasi

//state
const [title, setTitle] = useState('');
const [content, setContent] = useState('');

//state validation
const [validation, setValidation] = useState({});

Tahap 7: Penulisan Kode & Konfigurasi

//history
const history = useHistory();

Tahap 8: Penulisan Kode & Konfigurasi

<Form onSubmit={ storePost }>

	//...
	
</Form>

Tahap 9: Penulisan Kode & Konfigurasi

//method "storePost"
const storePost = async (e) => {
	
	//...
	
}

Tahap 10: Penulisan Kode & Konfigurasi

e.preventDefault();

Tahap 11: Penulisan Kode & Konfigurasi

//send data to server
await axios.post('http://localhost:3000/api/posts/store', {
   title: title,
   content: content
})

Tahap 12: Penulisan Kode & Konfigurasi

//redirect
history.push('/posts');

Tahap 13: Penulisan Kode & Konfigurasi

//assign validation on state
setValidation(error.response.data);

Tahap 14: Penulisan Kode & Konfigurasi

{
   validation.errors &&
     <Alert variant="danger">
        <ul class="mt-0 mb-0">
           { validation.errors.map((error, index) => (
               <li key={index}>{ `${error.param} : ${error.msg}` }</li>
           )) }
        </ul>
     </Alert>
}

Tahap 15: Penulisan Kode & Konfigurasi

<Form.Control type="text" value={title} onChange={(e) => setTitle(e.target.value)} placeholder="Masukkan Title" />

<Form.Control as="textarea" rows={3} value={content} onChange={(e) => setContent(e.target.value)} placeholder="Masukkan Content" />

Kesimpulan

Dengan mengikuti langkah-langkah terstruktur di atas, implementasi modul Anda akan jauh lebih rapi, aman dari bug umum, serta siap diskalakan ke lingkungan produksi.

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