3. 有 Admin 頁面. CodeIgniter 只能用 phpMyAdmin 來檢視 DB (如果你不用 command line 的話), 但 phpMyAdmin 的 GUI 個人一直覺得不是很習慣.

4. Django 多了一層 app, 屬於該 app 的 model, view, url map, test 等是放在該 app. (url map 的部分由主 app 先分派到該 app 的 urls.py)

5. Django 的 views.py 以 MVC 架構來說不是真的 view, 比較像是 controller 的角色 (Django 沒有 controllers.py). 相較之下 CodeIgniter 的 Controller/View 至少 naming 上是比較合理的.

6. 前端上 CodeIgniter 主要就是 php (還是有 CI 的 library, 但是不多), Django 前端會有大量的 Django template language,  門檻較高. 

“We set the form’s action to {% url ‘polls:vote’ poll.id %}, and we set method=”post”. Using method=”post” (as opposed to method=”get”) is very important, because the act of submitting this form will alter data server-side. Whenever you create a form that alters data server-side, use method=”post”. This tip isn’t specific to Django; it’s just good Web development practice.”

“Since we’re creating a POST form (which can have the effect of modifying data), we need to worry about Cross Site Request Forgeries. Thankfully, you don’t have to worry too hard, because Django comes with a very easy-to-use system for protecting against it. In short, all POST forms that are targeted at internal URLs should use the {% csrf_token %} template tag.”

“As the Python comment above points out, you should always return an HttpResponseRedirect after successfully dealing with POST data. This tip isn’t specific to Django; it’s just good Web development practice.”

“These views represent a common case of basic Web development: getting data from the database according to a parameter passed in the URL, loading a template and returning the rendered template. Because this is so common, Django provides a shortcut, called the “generic views” system.”

try:
    poll = Poll.objects.get(pk=poll_id)
except Poll.DoesNotExist:
    raise Http404
return render(request, 'polls/detail.html', {'poll': poll})

shortcut

poll = get_object_or_404(Poll, pk=poll_id)
return render(request, 'polls/detail.html', {'poll': poll})

where pk is primary key.

其中 {‘poll’: poll} 為 variable name to variable value map.

5. Removing hardcoded URLs in templates
original

<li><a href="/polls/{{ poll.id }}/">{{ poll.question }}</a></li>

modified

<li><a href="{% url 'detail' poll.id %}">{{ poll.question }}</a></li>

urlpatterns = patterns('', 
    url(r'^polls/', include('polls.urls', namespace="polls")), 
    url(r'^admin/', include(admin.site.urls)), 
)

<li><a href="{% url 'polls:detail' poll.id %}">{{ poll.question }}</a></li>