Django3.2 | 16 | QRオーダーシステムの構築 | 画像アップロード - 学生向けプログラミング入門

[15 | 飲食店表示]　<<　[ホーム]　>>　[17 | react-dropzone]

「src/apis.js」ファイルに関数を追加します。

記述追加　【Desktop/QRMenu/qrmenu_react/src/apis.js】

import { toast } from 'react-toastify';

function request(path,  {data = null, token = null, method = "GET" }) {
  return fetch(path, {
    method,
    headers: {
      Authorization: token ? `Token ${token}` : "",
      "Content-Type": "application/json",
    },
    body: method !=="GET" && method !== "DELETE" ? JSON.stringify(data): null,
  })
    .then((response) => {

      //もし成功したら
      if (response.ok) {
        if(method === "DELETE") {
          return true;
        }
        //toast.success("ログイン成功");
        return response.json();
      }
      //失敗
      return response.json().then((json) => {
          //JSONエラー
          if (response.status === 400) {
            toast.error("氏名もしくはパスワードに間違いがあります。");
            const errors = Object.keys(json).map(
                (k) => `${(json[k].join(" "))}`
            );
            throw new Error(errors.join(" "));
          }
          throw new Error(JSON.stringify(json));
        })
        .catch((e) => {
          if (e.name === "SyntaxError") {
            throw new Error(response.statusText);
          }
          throw new Error(e);
        })
    })

    .catch((e) => {
      //全エラー
      toast(e.message, { type: "error" });
    })
}

export function signIn(username, password) {
  return request("/auth/token/login/", {
    data: {username, password},
    method: "POST",
  })
}

export function register(username, password) {
  return request("/auth/users/", {
    data: {username, password},
    method: "POST",
  })
}

export function fetchPlaces(token) {
  return request("/api/places/", {token});
}

export function addPlace(data, token) {
  return request("/api/places/", {data, token, method: "POST" });
}

「src」フォルダに「containers」フォルダを新規作成します。
作成した「containers」フォルダに「PlaceForm.js」ファイルを新規作成します。

新規作成　【Desktop/QRMenu/qrmenu_react/src/containers/PlaceForm.js】

import { Form, Button } from 'react-bootstrap';
import React, { useState, useContext } from 'react';

import { addPlace } from '../apis';
import AuthContext from '../contexts/AuthContext';

const PlaceForm =({ onDone }) => {
    const [name, setName] = useState("");
    const [image, setImage] = useState("");

    const auth = useContext(AuthContext);

    const onClick = async () => {
        const json = await addPlace({ name, image }, auth.token)
        if(json) {
            setName("");
            setImage("");
            onDone();
        }
    }

    return (
        <div>
            <h4 classname="text-center">飲食店</h4>
    
            <Form.Group>
                      <Form.Label>飲食店名</Form.Label>
                      <Form.Control
                        type="text"
                        placeholder="飲食店名を入力"
                        value={name}
                        onChange={(e) => setName(e.target.value)}
                      />
            </Form.Group>
            <Form.Group>
                      <Form.Label>画像</Form.Label>
                      <Form.Control
                        type="text"
                        placeholder="画像URLを入力"
                        value={image}
                        onChange={(e) => setImage(e.target.value)}
                      />
            </Form.Group>
                    <Button variant="standard" block onClick={onClick}>
                        登録
                    </Button>
    
        </div>
    )
    
}



export default PlaceForm;

「src/pages/Places.js」ファイルに記述を追加します。

記述追加　【QRMenu/qrmenu_react/src/pages/Places.js】

import { Row, Col, Modal } from 'react-bootstrap';
import { React, useEffect, useState, useContext } from 'react';
import styled from 'styled-components';

import { fetchPlaces } from '../apis';
import AuthContext from '../contexts/AuthContext';

import MainLayout from '../layouts/MainLayout';
import PlaceForm from '../containers/PlaceForm';

const Place = styled.div`
    margin-bottom: 20px;
    cursor: pointer;
    transition: all 0.2s; 
    :hover {
        transform: scale(1.05);
    }
    > div {
        background-size: cover;
        height: 200px;
        border-radius: 5px;


    }
    > p {
        margin-top: 5px;
        font-size: 20px;
        font-weight: bold;
    }

`;

const AddPlaceButton =  styled.div`
    border: 1px dashed gray;
    height: 200px;
    border-radius: 5px;
    display: flex;
    aligh-items: center;
    justify-content: center;
    font-size: 20px;
    cursor: pointer;
    background-color: white;
    :hover {
        background-color: #fbfbfb;
    }
`;


const Places = () => {
    const [places, setPlaces] = useState([]);
    const [show, setShow] = useState(false); 

    const auth = useContext(AuthContext);

    const onHide = () => setShow(false);
    const onShow = () => setShow(true);

    const onFetchPlaces = async () => {
        const json = await fetchPlaces(auth.token);
        if (json) {
            setPlaces(json);
        }
    };

    const onDone = () => {
        onFetchPlaces();
        onHide();
    }

    useEffect(() => {
        onFetchPlaces();
    }, []);
   
    return (
        <MainLayout>
            <h3>登録済み飲食店</h3>
            <br/>
            <Modal show={show} onHide={onHide} centerd>

                <Modal.Body>
                    <PlaceForm onDone={onDone} />
                </Modal.Body>

            </Modal>

            <Row>
                { places.map((place) => (
                 
                    <Col key={place.id} lg={4}>
                    <Place>
                        <div style={{ backgroundImage: `url(${place.image})` }}></div>
                        <p>{place.name}</p>
                    </Place>
                    </Col>
                ))}
                <Col lg={4}>
                    <AddPlaceButton onClick={onShow}>飲食店登録</AddPlaceButton>
                </Col>
            </Row>
        </MainLayout>
    )
}

export default Places;