### Messageモデル
/hello/models.py
class Message(models.Model):
friend = models.ForeignKey(Friend, on_delete=models.CASCADE)
title = models.CharField(max_length=100)
content = models.CharField(max_length=300)
pub_date = models.DateTimeField(auto_now_add=True)
def __str__(self):
return '<Message:id=' + str(self.id) + ', ' + self.title + '(' + str(self.pub_date) + ')>'
class Meta:
ordering = ('pub_date',)
– on_delete=models.CASCADEは削除を指定するという意味
– auto_now_add=Trueは自動的に値を設定
– Metaはクラスの基本的設定を記述
### マイグレーション実行
$ python manage.py makemigrations helloMigrations for ‘hello’:
hello/migrations/0002_auto_20200712_2230.py
– Alter field age on friend
– Alter field name on friend
– Create model Message
$ python manage.py migrate
### admin.py
/hello/admin.py
from django.contrib import admin from .models import Friend, Message admin.site.register(Friend) admin.site.register(Message)
http://192.168.33.10:8000/admin/
### Messageページ作成
/hello/urls.py
path('message/', views.message, name='message'),
path('message/<int:page>', views.message, name='message'),
/hello/forms.py
from.models import Friend, Message
class MessageForm(forms.ModelForm):
class Meta:
model = Message
fields = ['title', 'content', 'friend']
widgets = {
'title': forms.TextInput(attrs={'class':'formcontrol form-control-sm'}),
'content': forms.Textarea(attrs={'class':'form-control form-control-sm', 'rows':2}),
'friend': forms.Select(attrs={'class':'form-control form-control-sm'}),
}
/hello/views.py
from .models import Friend, Message
from .forms import FriendForm, MessageForm
def message(request, page=1):
if(request.method == 'POST'):
obj = Message()
form = MessageForm(request.POST, instance=obj)
form.save()
data = Message.objects.all().reverse()
paginator = Paginator(data, 5)
params = {
'title': 'Message',
'form': MessageForm(),
'data': paginator.get_page(page),
}
return render(request, 'hello/message.html', params)
/hello/templates/hello/message.html
<body class="container">
<h1 class="display-4 text-primary">{{title}}</h1>
<form action="{% url 'message' %}" method="post">
{% csrf_token %}
{{ form.as_p }}
<input type="submit" value="send" class="btn btn-primary">
<div class="mt-5"></div>
<table class="table">
<tr>
<th class="py-1">title</th>
<th class="py-1">name</th>
<th class="py-1">datetime</th>
</tr>
{% for item in data %}
<tr>
<td class="py-2">{{item.title}}</td>
<td class="py-2">{{item.friend.name}}</td>
<td class="py-2">{{item.pub_date}}</td>
</tr>
{% endfor %}
</table>
<ul class="pagination justify-content-center">
{% if data.has_previous %}
<li class="page-item">
<a class="page-link" href="{% url 'message' %}">
« first</a>
</li>
<li class="page-item">
<a class="page-link" href="{% url 'message' %}{{data.previous_page_number}}">
« prev</a>
</li>
{% else %}
<li class="page-item">
<a class="page-link">
« first</a>
</li>
<li class="page-item">
<a class="page-link">
« prev</a>
</li>
{% endif %}
<li class="page-item">
<a class="page-link">
{{data.number}}/{{data.paginator.num_pages}}</a>
</li>
{% if data.has_next %}
<li class="page-item">
<a class="page-link" href="{% url 'message' %}{{data.next_page_number}}">
next »</a>
</li>
<li class="page-item">
<a class="page-link" href="{% url 'message' %}{{data.paginator.num_pages}}">
last »</a>
</li>
{% else %}
<li class="page-item">
<a class="page-link">next »</a>
</li>
<li class="page-item">
<a class="page-link">last »</a>
</li>
{% endif %}
</ul>
</body>
/hello/templates/hello/index.html
<table class="table">
<tr>
<th>id</th>
<th>name</th>
<th>age</th>
<th>mail</th>
<th>birthday</th>
<th>Messages</th>
</tr>
{% for item in data %}
<tr>
<td>{{item.id}}</td>
<td>{{item.name}}</td>
<td>{{item.age}}</td>
<td>{{item.mail}}</td>
<td>{{item.birthday}}</td>
<td><ul>
{% for ob in item.message_set.all %}
<li>{{ob.title}}</li>
{% endfor %}
</ul>
</td>
</tr>
{% endfor %}
</table>
