django - 總結 - ModelForm

1 gender = forms.ChoiceField(choices=((1, '男'), (2, '女'), (3, '其餘')))  # 與sql不要緊
2 publish = forms.ChoiceField(choices=Publish.objects.all().values_list('pk', 'name'))
3 publish = forms.ModelChoiceField(queryset=Publish.objects.all(), label='出版社')
4 authors = forms.ModelMultipleChoiceField(queryset=Author.objects.all(), label='做者')

-------->forms在post提交數據時,能夠驗證並將數據返回前端,

　　　　　　get請求時,如何將數據返回前端？

 

ModelForm

 1 from django.forms import ModelForm
 2 from django.forms import widgets as wid  # 由於重名，因此起個別名！
 3 class BookForm(ModelForm):
 4     class Meta:
 5         model = Book  # 關聯的哪一個模型
 6         fields = "__all__"  # 對全部字段轉換　 ["title",...]
 7         exclude = None  # 排除的字段
 8 
 9         # 自定義在前端顯示的名字
10         labels = {"title": "書籍名稱", "price": "價格", "date": "日期", "publish": "出版社", "authors": "做者"}
11         widgets = {
12             'title': wid.TextInput(attrs={'class': 'form-control'}),
13             'price': wid.TextInput(attrs={'class': 'form-control'}),
14             'date': wid.TextInput(attrs={'class': 'form-control', 'type': 'date'}),
15             'publish': wid.Select(attrs={'class': 'form-control'}),
16             'authors': wid.SelectMultiple(attrs={'class': 'form-control'})
17         }
18         error_messages = {
19             'title': {'required': '不能爲空'},
20             'price': {'required': '不能爲空'},
21             'date': {'required': '不能爲空', 'invalid': '格式錯誤'},
22             'publish': {'required': '不能爲空'},
23             'authors': {'required': '不能爲空'},
24         }

 

1 #  editdisplay
2 edit_book = Book.objects.filter(pk=edit_book_id).first()
3 # form = BookForm(initial={"title": edit_book.title, "price": edit_book.price, "date": edit_book.date,
4 #                          "publish": edit_book.publish, 'authors': edit_book.authors.all()})
5 form = BookForm(initial=edit_book)
6 return render(request, "edit.html", locals())

1 # create、update 
2 form = BookForm(request.POST)  # create
3 if form.is_valid():
4      form.save()  # form.model.objects.create(request.POST)      
5         
6 form = BookForm(request.POST,instance=edit_book)  # update
7 if form.is_valid():
8      form.save()   # edit_book.update(request.POST)

 1 # display
 2 {% for book in book_list %}
 3        <tr>
 4            <td>{{ book.title }}</td>
 5            <td>{{ book.price }}</td>
 6            <td>{{ book.date|date:"Y-m-d" }}</td>
 7            <td>{{ book.publish.name }}</td>
 8            <td>{{ book.authors.all }}</td>
 9             <td><a href="/book/edit/{{book.pk}}"><button>編輯</button></a></td>
10        </tr>
11     {% endfor %}