ModelForm

1、实质

model 和form组件相结合

2、定义

from django.forms import ModelForm

class BookForm(ModelForm):
    class Meta:
        model = Book
        fields = '__all__'
        labels = {
            'name': "书名:",
            'price': "价格:",
            'data': "日期:",
            'publisher': "出版社",
            'authors': "作者",
        }
        widgets = {
            'data': wid.TextInput(attrs={"type": "date"})
        }

3、添加数据

def add_book(request):
    if request.method == "POST":
        book = BookForm(request.POST)
        if book.is_valid():
　　　　　　　# 将添加的数据保存到数据库中
            book.save()
            return redirect("/books/")
　　　　  else:
　　　　　　  return HttpResponse(book.errors)
　　# 获取model的表
    book = BookForm()
    return render(request, "add_book.html", {'book': book})

4、修改数据

def edit_book(request, edit_id):
    book_obj = Book.objects.filter(nid=edit_id).first()
    if request.method == "POST":
        # 修改数据
        book = BookForm(request.POST, instance=book_obj)
        if book.is_valid():
            book.save()
            return redirect("/books/")
    # 获取表 和 改对应对应的 数据
    book = BookForm(instance=book_obj)
    return render(request, "edit_book.html", {"book": book})

5、模板

<form action="" method="post" novalidate>
{% csrf_token %}
    {% for filed in book %}
    <p>
        {{ filed.label }}
        {{ filed }}
    </p>
{% endfor %}
    <input type="submit" name="" id="" value="提交">
</form>

 注意：form组件和Model无关