報錯1：

The view sign_up.views.new_user didn't return an HttpResponse object. It returned None instead.

views.py程式碼

def new_user(request):
    if request.method != 'POST':
        form = UserInfoForm()
    else:
        form = UserInfoForm(request.POST)
        if form.is_valid():
            form.save()
            return
 
 HttpResponseRedirect(reverse('sign_up:index'))

        context = {'form':form}
        return render(request,'new_user.html',context)

models.py程式碼

class User_info(models.Model):
    name = models.CharField(max_length=100)
    student_id = models.CharField(max_length=9)
    college = models.CharField(max_length=100
 
)
    date_added = models.DateField(auto_now_add=True)

    def __str__(self):
        return self.name

new_user.html程式碼

{% extends 'sign_up/index.html' %}
{% block header %}
    <div>請填寫資訊</div>
{% endblock %}
{% block content %}
    <form action="{% url 'sign_up:new_user' %}" method
 
="post">
    {% csrf_token %}
    {% form.as_p %}
    <button type="submit">Add user</button>
    </form>
{% endblock %}

錯誤原因：當時報錯時查詢各種資料以及函式都沒有解決。。。最後發現是由於views.py檔案中的沒有返回值，return錯位導致。

正確程式碼如下：

def new_user(request):
    if request.method != 'POST':
        form = UserInfoForm()
    else:
        form = UserInfoForm(request.POST)
        if form.is_valid():
            form.save()
            return HttpResponseRedirect(reverse('sign_up:index'))

    context = {'form':form}
    return render(request,'new_user.html',context)

報錯2：

Invalid block tag on line 8: 'form.as_p', expected 'endblock'. Did you forget to register or load this tag?

錯誤原因：前端模版中form.as_p應該放在{{ }}中，而不是{% %}中

報錯3：

no such table: sign_up_actor_info

錯誤原因：應當使用python manage.py makemigrations以及`python manage.py migrate來遷移資料庫以及修改資料庫即可

報錯4：

Specifying a namespace in include() without providing an app_name

錯誤原因：python3 Django 環境下，如果你遇到namespace沒有註冊以及在根目錄下urls.py中的include方法的第二個引數namespace新增之後就出錯的問題。請在[app_name]目錄下的urls.py中的urlpatterns前面加上app_name=’[app_name]’， [app_name]代表你的應用的名稱。

報錯5：

![這裡寫圖片描述](//img-blog.csdn.net/20180313203700214?watermark/2/text/Ly9ibG9nLmNzZG4ubmV0L3FxXzM4NTQyMDg1/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70)

錯誤原因：將根目錄下的url(r'^users/$',include('users.urls',namespace='users')),中的$刪除

報錯6：

@login_required
def new_actor(request):
    if request.method != 'POST':
        form = ActorInfoForm()
    else:
        form = ActorInfoForm(data=request.POST)
        if form.is_valid():
            new_actor = form.save()
            new_actor.owner = request.user
            new_actor.save()
            return HttpResponseRedirect(reverse('sign_up:index'))

    context = {'form':form}
    return render(request, 'sign_up/new_actor.html', context)

錯誤原因：在第一次form.save時應該是用引數commit=False，使其不上傳到資料庫，因為後面還要對其資訊進行新增

正確程式碼如下：

@login_required
def new_actor(request):
    if request.method != 'POST':
        form = ActorInfoForm()
    else:
        form = ActorInfoForm(data=request.POST)
        if form.is_valid():
            new_actor = form.save(commit=False) #commit=False指不要提交到資料庫
            new_actor.owner = request.user
            new_actor.save()
            return HttpResponseRedirect(reverse('sign_up:index'))

    context = {'form':form}
    return render(request, 'sign_up/new_actor.html', context)

報錯7：

'QuerySet' object has no attribute 'owner'

@login_required
def edit_actor(request,actor_id):
    actor = Actor_info.objects.filter(id=actor_id)
    if actor.owner != request.user:
        raise Http404
    if request.method == 'POST':
        college = request.POST.get('college')
        student_id = request.POST.get('student_id')
        name = request.POST.get('name')
        Actor_info.objects.filter(id=actor_id).update(
            college=college,student_id=student_id,name=name
        )
        return HttpResponseRedirect(reverse('sign_up:actor',args={'actor_id':actor_id}))

    context = {'actor':actor}
    return render(request,'sign_up/edit_actor.html',context=context)

錯誤原因：應該使用get而不是filter

正確程式碼如下：

@login_required
def edit_actor(request,actor_id):
    actor = Actor_info.objects.get(id=actor_id)
    if actor.owner != request.user:
        raise Http404
    if request.method == 'POST':
        college = request.POST.get('college')
        student_id = request.POST.get('student_id')
        name = request.POST.get('name')
        Actor_info.objects.filter(id=actor_id).update(
            college=college,student_id=student_id,name=name
        )
        return HttpResponseRedirect(reverse('sign_up:actor',args=[actor_id]))

    context = {'actor':actor}
    return render(request,'sign_up/edit_actor.html',context=context)

報錯8：

Reverse for 'actor' with no arguments not found. 1 pattern(s) tried: ['actors/(?P<actor_id>\\d+)/$']
Request Method: POST

@login_required
def edit_actor(request,actor_id):
    actor = Actor_info.objects.get(id=actor_id)
    if actor.owner != request.user:
        raise Http404
    if request.method == 'POST':
        college = request.POST.get('college')
        student_id = request.POST.get('student_id')
        name = request.POST.get('name')
        Actor_info.objects.filter(id=actor_id).update(
            college=college,student_id=student_id,name=name
        )
        return HttpResponseRedirect(reverse('sign_up:actor'),args=[actor_id])

    context = {'actor':actor}
    return render(request,'sign_up/edit_actor.html',context=context)

錯誤原因：args為reverse函式的引數，而不是HttpResponseRedirect的引數

正確程式碼如下：

@login_required
def edit_actor(request,actor_id):
    actor = Actor_info.objects.get(id=actor_id)
    if actor.owner != request.user:
        raise Http404
    if request.method == 'POST':
        college = request.POST.get('college')
        student_id = request.POST.get('student_id')
        name = request.POST.get('name')
        Actor_info.objects.filter(id=actor_id).update(
            college=college,student_id=student_id,name=name
        )
        return HttpResponseRedirect(reverse('sign_up:actor',args=[actor_id]))

    context = {'actor':actor}
    return render(request,'sign_up/edit_actor.html',context=context)