python - Django 表单错误：语输入值列表。

Question

这是我的观点。我想通过文本而不是复选框添加一个多字段，以便我可以创建新字段并获取旧字段。我希望用户只用空格分隔每种语言

class CreateBooksView(LoginRequiredMixin,CreateView):
    login_url = "/books/login"
    form_class = CreateBooksForm
    template_name = "books/create.html"
    success_url = reverse_lazy('home')


    def form_valid(self,form):
        tag_list=[]
        books = form.save(commit=False)
        books.author = self.request.user
        tags = form.cleaned_data['language']
        print(tags)
        tag_list=[Language.objects.get_or_create(name=tag)[0] for tag in 
        tags.split()]
        for tag in tag_list:
            a = books.language.add(tag)
        books.language = a    
        books.save()
        return super(CreateBooksView,self).form_valid(form)


    def form_invalid(self,form):
        print (form.errors)
        return super(CreateBooksView,self).form_invalid(form) 

from django import forms
from books.models import Book
class CreateBooksForm(forms.ModelForm):
    class Meta:
        model = Book
        fields = "name","about","language","image"
        widgets = {
            'language': forms.Textarea(attrs={'cols': 80, 'rows': 2}),

这是我的模型。所以我想要过滤的 ManytoManyField 是语言。

class Language(models.Model):
    name= models.CharField(max_length=100)

    def __str__(self):
        return self.name

class Book(models.Model):
    name=models.CharField(max_length=200) 
    about =models.TextField()
    image = models.ImageField(upload_to=upload_image)  
    language = models.ManyToManyField(Language,related_name='book') 
    author = models.ForeignKey(User,on_delete=models.PROTECT,related_name='bauthor')
    def __str__(self):
        return self.name  


    class Meta:
        ordering = ('-pk',)

标签： pythondjango

Answer 1

您的语言字段ModelForm需要一个 id 列表而不是字符串。我的建议是从您的语言字段中取出ModelForm并添加一个非模型字段来处理标签。

#forms.py

class CreateBooksForm(forms.ModelForm):

    tags = forms.CharField(widget=forms.Textarea(attrs={'cols': 80, 'rows': 2}))

    class Meta:
        model = Book
        fields = "name","tags", "about","image"

然后处理视图中的标签

...

def form_valid(self,form):
    tag_list=[]
    books = form.save(commit=False)
    books.author = self.request.user
    tags = form.cleaned_data['tags']
    books.save() # must be save before adding m2m
    tag_list=[Language1.objects.get_or_create(name=tag)[0] for tag in tags.split()]

    for tag in tag_list:
        a = books.language.add(tag) 
    books.save()
    return super(CreateBooksView,self).form_valid(form)