Overview

This article walks you through the steps of a beginner developing a coupon distribution service for the iPhone with a RESTful API and swift. It is a very detour implementation because it was implemented while examining the technical elements one by one.

Django's template feature isn't really needed, but I'll give it a try for learning. Based on the code created in the previous Let's make a simple web API with (for beginners) Django.

reference

Python Django Super Introductory by Yano Palm Tatsu Shuwa System

environment

Mac OS 10.15 VSCode 1.39.2 pipenv 2018.11.26 Python 3.7.4 Django 2.2.6

web API specifications

When you request a coupon code with a URL, the contents of the coupon associated with the coupon code will be displayed as a template.

Request parameter: coupon_code
If you specify 0001 for coupon_code, the character string "1000 yen discount coupon!" Will be returned.
If you specify 0002 for coupon_code, the character string "10% discount coupon!" Will be returned.
If you do not specify a code or enter a code that does not exist, the string "No coupon available" will be returned.

procedure

Make the following modifications to the code created in (for beginners) Create a simple web API with Django.

Register your application to use Django features
Create a template html file
Implemented modified views.py so that the render function can send values to the template
Operation check

Register your application to use Django features

Just add the app name (coupon) to INSTALLED_APPS in settings.py under the project name folder.

`settings.py`


INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'coupon', #Added line
]

Create html file of template

Create a templates directory under the coupon directory, and then create a coupon directory under the templates directory. (Django's file reference specification recommends duplicating directories in consideration of creating multiple index.html files.)

Create index.html in the created coupon directory. The name of the coupon is tentative and will be Amigo Coupon.

`index.html`


<!DOCTYPE html>
<html lang="ja">
<head>
    <meta charset="utf-8">
    <title>Amigo Coupon</title>
</head>
<body>
    <h1>Amigo Coupon</h1>
    <p>
        <ul>
            <li>Coupon code:{{coupon_code}}</li>
            <li>Benefits:{{coupon_benefits}}</li>
            <li>expiration date:{{coupon_deadline}}</li>
            <li>{{message}}</li>
        </ul>
    </p>
</body>
</html>

Modified views.py so that the render function can send values to the template

Modify as follows.

`views.py`


from django.shortcuts import render
from django.http import HttpResponse

# Create your views here.
def coupon(request):
    if 'coupon_code' in request.GET:
        coupon_code = request.GET['coupon_code']
        if coupon_code == '0001':
            benefit = '1000 yen discount coupon!'
            deadline = '2019/10/31'
            message = ''
        elif coupon_code == '0002':
            benefit = '10%Discount coupon!'
            deadline = '2019/11/30'
            message = ''
        else:
            benefit = 'NA'
            deadline = 'NA'
            message = 'No coupons available'

        params = {
            'coupon_code':coupon_code,
            'coupon_benefits':benefit,
            'coupon_deadline':deadline,
            'message':message,
        }
        return render(request, 'coupon/index.html', params)