【初めてのDjango】（発展編 #05）CreateViewを使用してデータベース更新

from django.urls import path
from . import views

urlpatterns = [
    # ... 略 ...
    path('create-menu', views.CreateMenuView.as_view(), name="create_menu"), 
]

import logging
from django.urls import reverse_lazy
from django.views import generic
from django.contrib import messages
from django.contrib.auth.mixins import LoginRequiredMixin

from .forms import ContactForm, CreateMenuForm
from .models import CafeMenu

# ... 略 ...

class CreateMenuView(LoginRequiredMixin, generic.CreateView):
    model = CafeMenu
    template_name = 'create_menu.html'
    form_class = CreateMenuForm

    # 処理が成功したときのリダイレクト先の設定
    success_url = reverse_lazy('cafe_app:original_menu_list')

    # データベースに保存するだけなら不要だが、userやcreated_atなどがカスタムユーザーモデルからなのでオーバーライドする必要がある.
    def form_valid(self, form):
        menu = form.save(commit=False)
        menu.user = self.request.user
        menu.save()
        messages.success(self.request, '新規メニューを作成しました')
        return super().form_valid(form)

model = CafeMenu
form_class = CreateMenuForm

user = models.ForeignKey(CustomUser, verbose_name='ユーザー', on_delete=models.PROTECT)
created_at = models.DateTimeField(verbose_name='作成日時', auto_now_add=True)
updated_at = models.DateTimeField(verbose_name='更新日時', auto_now=True)

def form_valid(self, form):
    menu = form.save(commit=False)
    menu.user = self.request.user
    menu.save()
    messages.success(self.request, '新規メニューを作成しました')
    return super().form_valid(form)

# ... 略 ...
from .models import CafeMenu

# ... 略 ...

class CreateMenuForm(forms.ModelForm):
    class Meta:
        model = CafeMenu
        fields = ('photo', 'name', 'price', 'description')

{% extends 'base.html' %}

{% load static %}

{% block title %}お問い合わせ{% endblock title %}

{% block contents %}
<section class="sectionContact">
    <div class="wrapperHeader">
        <h2>CREATE</h2>
    </div>
    <div class="wrapperForm">
        <form method="post" enctype="multipart/form-data">
            {% csrf_token %}

            {{ form.non_field_errors }}

            {% for field in form %}
            <div class="formContent">
                <p>{{ field.label_tag }}</p>
                {{ field }}
                {{ field.errors }}
            </div>
            {% endfor %}
            <button type="submit">作 成</button>
        </form>
    </div>
    <a class="backToHome" href="{% url 'cafe_app:index' %}">＜＜＜ホームに戻る</a>
</section>
{% endblock contents %}

{{ form.as_table }}

<form method="post" enctype="multipart/form-data">

<!-- ... 略 ... -->

<section class="sectionMenu">
    <div class="wrapperHeader">
        <h2>ORIGINAL MENU</h2>
        <p class="notion"><a href="{% url 'cafe_app:create_menu' %}">新規メニューを作る</a></p>
    </div>

    <!-- ... 略 ... -->

</section>

.notion {
    display: block;
    margin: 20px;
}