Online Shop_4

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Coupon app

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STEP 1 coucpon app

python manage.py startapp coupon

STEP 2 config/settings.py

INSTALLED_APPS = [
	'coupon',
]

STEP 3 cart/cart.py 에 추가

from coupon.models import Coupon

if not cart :
	cart = self.session[settings.CART_ID] = {}
    self.cart = cart
    self.coupon_id = self.session.get('coupon_id')

# 장바구니 비우기
def clear(self):
    self.session[settings.CART_ID] = {}
    self.session.modified = True
    self.session['coupon_id'] = None # 쿠폰 추가
    // 쿠폰 정보 삭제를 위해 session에 저장된 coupon_id 를 None 으로 지정한 것

STEP 4 coupon/models.py

from django.db import models
from django.core.validators import MinValueValidator, MaxValueValidator

# Create your models here.
# coupon
class Coupon(models.Model):
    code = models.CharField(max_length=50,unique=True)
    use_from= models.DateField()
    use_to = models.DateField()
    amount = models.IntegerField(validators=[MinValueValidator(0), MaxValueValidator(100000)])
    active = models.BooleanField()

    def __str__(self):
        return self.code

STEP 5 DB 반영

python manage.py makemigrations coupon
python manage.py migrate

STEP 6 coupon/forms.py

from django import forms

class AddCouponForm(forms.Form):
    code = forms.CharField(label='쿠폰 코드 입력')

STEP 7 coupon/views.py

from django.shortcuts import render, redirect
from django.utils import timezone
from django.views.decorators.http import require_POST

from .models import Coupon
from .forms import AddCouponForm

# Create your views here.
# 쿠폰 추가 뷰
@require_POST 
// view 가 POST 메서드만 허용하도록 하는 데코레이터

def add_coupon(request):
    now = timezone.now()
    form = AddCouponForm(request.POST)
    if form.is_valid():
        code = form.cleaned_data['code']
        // 입력한 쿠폰 코드를 이용해 쿠폰 조회

        try:
            coupon = Coupon.objects.get(code__iexact=code, use_from__lte=now,
                                        use_to__gte=now, active=True)
            request.session['coupon_id'] = coupon.id
        except Coupon.DoesNotExist:
            request.session['coupon_id'] = None
    return redirect('cart:detail')

STEP 8 url 연결

# coupon/urls.py

from django.urls import path
from .views import add_coupon

app_name = 'coupon'

urlpatterns =[
    path('add/',add_coupon, name='add'),
]

# config/urls.py

path('coupon/', include('coupon.urls')),

STEP 9 cart/cart.py

@property
def coupon(self):
    if self.coupon_id:
        return Coupon.objects.get(id=self.coupon_id)
    return None
def get_discount_total(self):
    if self.coupon:
        if self.get_product_total() >= self.coupon.amount:
            return self.coupon.amount
    return Decimal(0)
def get_total_price(self):
    return self.get_product_total() - self.get_discount_total()

STEP 10 cart/views.py

def detail(request):
    cart = Cart(request)
    add_coupon = AddCouponForm()

    for product in cart:
        product['quantity_form'] = AddProductForm(initial={'quantity':product['quantity'], 'is_update':True})

    return render(request, 'cart/detail.html',{'cart':cart, 'add_coupon':add_coupon})

STEP 11 cart/detail.html

<p>
    사용 쿠폰 :
</p>
<form action="{%  url 'coupon:add' %}" method = "post">
{{add_coupon}}
<input class ="btn btn-outline-info"  type="submit" value ="사용">
{% csrf_token %}
</form>

<p class="text-right">
    <a href="{% url 'shop:product_all' %}" class="btn btn-secondary">Continue shopping</a>
    <a href="#" class="btn btn-info">Checkout</a>
</p>

STEP 12 coupon/admin.py

# 쿠폰은 보통 관리자가 생성하므로 관리자 페이지에 쿠폰 등록

from django.contrib import admin
from .models import Coupon


# Register your models here.
class CouponAdmin(admin.ModelAdmin):
    list_display = ['code','use_from','use_to','amount','active']
    list_filter = ['active','use_from','use_to']
    search_fields = ['code']

admin.site.register(Coupon, CouponAdmin)

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admin 에 쿠폰까지 등록해서 할인된 금액까지 화면에 보여질 수 있게 코드 작성하며 스터디 진행

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