Django: Model Form“ object has no Attribute‘ clean_data’”

我正在尝试为我的一个班级制作一个搜索表单，这个表单的模型是:

from django import forms
from django.forms import CharField, ModelMultipleChoiceField, ModelChoiceField
from books.models import Book, Author, Category


class SearchForm(forms.ModelForm):
authors = ModelMultipleChoiceField(queryset=Author.objects.all(),required=False)
category = ModelChoiceField (queryset=Category.objects.all(),required=False)
class Meta:
model = Book
fields = ["title"]

我的观点是:

from django.shortcuts import render_to_response, redirect, get_object_or_404
from django.template import RequestContext
from books.models import Book,Author
from books.forms import BookForm, SearchForm
from users.models import User


def search_book(request):
if request.method == "POST":
form = SearchForm(request.POST)
if form.is_valid():
form = SearchForm(request.POST)
stitle = form.cleaned_data['title']
sauthor = form.cleaned_data['author']
scategory = form.cleaned_data['category']
else:
form = SearchForm()
return render_to_response("books/create.html", {
"form": form,
}, context_instance=RequestContext(request))

表单显示得很好，但是当我提交它时，我得到一个错误: 'SearchForm' object has no attribute 'cleaned_data'

我不知道发生了什么事，有人能帮帮我吗? 谢谢！

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小开

I would write the code like this:

def search_book(request):
form = SearchForm(request.POST or None)
if request.method == "POST" and form.is_valid():
stitle = form.cleaned_data['title']
sauthor = form.cleaned_data['author']
scategory = form.cleaned_data['category']
return HttpResponseRedirect('/thanks/')
return render_to_response("books/create.html", {
"form": form,
}, context_instance=RequestContext(request))

Pretty much like the documentation.

小开
最佳答案

For some reason, you're re-instantiating the form after you check is_valid(). Forms only get a cleaned_data attribute when is_valid() has been called, and you haven't called it on this new, second instance.

Just get rid of the second form = SearchForm(request.POST) and all should be well.

小开

At times, if we forget the

return self.cleaned_data

in the clean function of django forms, we will not have any data though the form.is_valid() will return True.

小开

I was facing the same problem, I changed the code like this

 if request.method == "POST":
form = forms.RegisterForm(request.POST)
if form.is_valid():
username = form.cleaned_data.get('username')
fname = form.cleaned_data.get('fname')
lname = form.cleaned_data.get('lname')
email = form.cleaned_data.get('email')
pass1 = form.cleaned_data.get('pass1')
pass2 = form.cleaned_data.get('pass2')

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