Python Djangoという参考書で勉強していたのですが
４−３ページネーションの「ページの移動はどうするの？」で躓いてます。
firstはちゃんと動くのですが、prev,next,lastがどうしてもPage not foundになってしまいます。
何方か教えてくれませんか？
ソースはこんな感じです
初投稿なのでうまく使えてないと思います。すみません
django_app/hello/url.py
from django.urls import path
from . import views
urlpatterns=[
path('',views.index,name='index'),
path('int:num',views.index,name='index'),
path('create',views.create,name='create'),
path('edit/int:num',views.edit,name='edit'),
path('delete/int:num',views.delete,name='delete'),
path('find',views.find,name='find'),
path('check',views.check,name='check'),
]
django_app/hello/views.py
from django.shortcuts import render
from django.http import HttpResponse
from django.shortcuts import redirect
from .models import Friend
from .forms import FriendForm
from .forms import FindForm
from django.db.models import Q
from django.db.models import Count,Sum,Avg,Min,Max
from .forms import CheckForm
from django.core.paginator import Paginator
def index(request,num=1):
data = Friend.objects.all()
page = Paginator(data,3)
params = {
'title': 'Hello',
'message':'',
'data': page.get_page(num),
}
return render(request,'hello/index.html',params)
create model
def create(request):
if (request.method == 'POST'):
obj = Friend()
friend = FriendForm(request.POST,instance=obj)
friend.save()
return redirect(to='/hello')
params = {
'title' : 'Hello',
'form' : FriendForm(),
}
return render(request,'hello/create.html',params)
def edit(request,num):
obj = Friend.objects.get(id=num)
if (request.method == 'POST'):
friend = FriendForm(request.POST,instance=obj)
friend.save()
return redirect(to='/hello')
params={
'title' : 'Hello',
'id' : num,
'form' : FriendForm(instance=obj),
}
return render(request,'hello/edit.html',params)
def delete(request,num):
friend = Friend.objects.get(id=num)
if (request.method == 'POST'):
friend.delete()
return redirect(to='/hello')
params = {
'title' : 'Hello',
'id' : num,
'obj' : friend,
}
return render(request,'hello/delete.html',params)
def find(request):
if (request.method == 'POST'):
msg = request.POST['find']
form = FindForm(request.POST)
sql = 'select * from hello_friend'
if (msg != ''):
sql += ' where ' + msg
data = Friend.objects.raw(sql)
msg = sql
else:
msg = 'search words...'
form = FindForm()
data =Friend.objects.all()
params = {
'title' : 'Hello',
'message' : msg,
'form' :form,
'data' :data,
}
return render(request,'hello/find.html',params)
def check(request):
params={
'title' : 'Hello',
'message' : 'check validation.',
'form' : CheckForm(),
}
if (request.method == 'POST'):
obj = Friend()
form = FriendForm(request.POST,instance=obj)
params['form'] = form
if (form.is_valid()):
params['message'] = 'OK!'
else:
params['message'] = 'no good.'
return render(request,'hello/check.html',params)
django_app/hello/template/hello/index.html
{% load static %}
<!DOCTYPE html>
{{title}}
href="{% static 'hello/css/style.css' %}" />
{{title}}
{{message|safe}}
| id | name | age | birthday | |
|---|---|---|---|---|
| {{item.id}} | {{item.name}} | {{item.age}} | {{item.mail}} | {{item.birthday}} |
{% if data.has_previous %}
«first
«prev
{% endif %}
[{{data.number}}/{{data.paginator.num_pages}}]
{% if data.has_next %}
next»
last»
{% endif %}