回答編集履歴
4
回答を修正
answer
CHANGED
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@@ -24,14 +24,18 @@
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24
24
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ctx = super().get_context_data(**kwargs)
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25
25
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pk = self.request.GET.get('pk', None)
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26
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if pk:
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27
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+
ctx['current_book'] = get_object_or_404(Book, pk=int(id))
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28
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+
else:
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29
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ctx['current_book'] = ctx['object_list'].first()
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30
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return ctx
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31
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+
def get(self, request, *args, **kwargs):
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32
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pk = self.request.GET.get('pk', None)
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33
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if pk:
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27
34
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try:
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28
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-
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35
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+
_ = int(pk)
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29
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-
ctx['current_book'] = get_object_or_404(Book, pk=id)
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36
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except ValueError:
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31
37
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return HttpResponseBadRequest()
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32
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-
else:
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33
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-
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38
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+
return super().get(request, *args, **kwargs)
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34
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-
return ctx
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35
39
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36
40
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# in books/urls.py
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37
41
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from .views import BookList
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3
サンプルの改善
answer
CHANGED
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@@ -20,14 +20,17 @@
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20
20
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from .models import Book
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21
21
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class BookList(generic.ListView):
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model = Book
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-
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24
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def get_context_data(self, **kwargs):
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25
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-
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24
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+
ctx = super().get_context_data(**kwargs)
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26
25
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pk = self.request.GET.get('pk', None)
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26
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+
if pk:
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27
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+
try:
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27
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-
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28
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id = int(pk)
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29
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+
ctx['current_book'] = get_object_or_404(Book, pk=id)
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30
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+
except ValueError:
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28
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-
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31
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return HttpResponseBadRequest()
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29
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-
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32
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+
else:
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30
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-
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33
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+
ctx['current_book'] = ctx['object_list'].first()
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31
34
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return ctx
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32
35
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33
36
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# in books/urls.py
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2
サンプルの修正
answer
CHANGED
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@@ -33,7 +33,7 @@
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33
33
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# in books/urls.py
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34
34
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from .views import BookList
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35
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urlpatterns = [
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36
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-
path('', BookList.as_view, name='book-list'),
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36
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+
path('', BookList.as_view(), name='book-list'),
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37
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]
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38
38
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39
39
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# in <project>/urls.py
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1
サンプルを追加
answer
CHANGED
|
@@ -2,4 +2,59 @@
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2
2
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3
3
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ジェネリックビューは、一般的によく使用されるパターンを簡易に実装するための仕組みです。
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4
4
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5
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-
アプリ固有の仕様を満たすビューは、ListViewやDetailViewを上記で提示したようにカスタマイズするか、TempleteViewで実装します。
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5
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+
アプリ固有の仕様を満たすビューは、ListViewやDetailViewを上記で提示したようにカスタマイズするか、TempleteViewで実装します。
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6
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+
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7
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+
（ミスがあるかもしれませんが・・・）下記のように実装すれば、下に示したURLで詳細とリストが表示されるはずです。
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8
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+
URL: http://127.0.0.1:8000/books/?pk=1
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9
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+
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10
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+
```python
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11
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+
# in books/models.py
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12
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+
from django.db import models
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13
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+
class Book(models.Model):
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14
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+
title = models.CharField(max_length=80)
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15
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+
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16
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+
# in books/views.py
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17
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+
from django.views import generic
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18
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+
from django.http.response import HttpResponseBadRequest
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19
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+
from django.shortcuts import get_object_or_404
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20
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+
from .models import Book
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21
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+
class BookList(generic.ListView):
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22
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model = Book
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23
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+
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24
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+
def get_context_data(self, **kwargs):
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25
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"""GETパラメーターのpkをidに持つBookが存在しな場合は404"""
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26
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+
pk = self.request.GET.get('pk', None)
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27
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+
if pk is None:
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28
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+
return HttpResponseBadRequest()
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29
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+
ctx = super().get_context_data(**kwargs)
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30
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+
ctx['current_book'] = get_object_or_404(Book, pk=pk)
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31
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+
return ctx
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32
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+
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33
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+
# in books/urls.py
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34
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+
from .views import BookList
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35
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+
urlpatterns = [
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36
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+
path('', BookList.as_view, name='book-list'),
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37
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+
]
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38
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+
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39
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+
# in <project>/urls.py
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40
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+
from django.urls import path, include
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|
41
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+
urlpatterns = [
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42
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+
path('books/',include("books.urls")),
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43
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+
]
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44
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+
```
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45
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+
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46
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+
```html
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47
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+
# in books/templates/books/book_list.html
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48
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+
<html>
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49
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+
<body>
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50
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+
<div>{{ current_book.title }}</div>
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51
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+
<div>
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52
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+
<table>
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53
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+
{% for book in object_list %}
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54
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+
<tr><td>{{ book.title }}</td></tr>
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55
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+
{% endfor }
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|
56
|
+
</table>
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57
|
+
</div>
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|
58
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+
</body>
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|
59
|
+
</html>
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|
60
|
+
```
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