Question

我已经在models.py中定义了一个类别的选项，这个类别在forms.py中引用，如下所示：

models.py

class Exp(models.Model):
    CATEGORIES = ( ('Inc', 'Inc'),\
                   ('Hom', 'Hom'),\
                   ('syn', 'Syn'),\
                   ('Was', 'Was')\
                 )

forms.py

class ExpForm(ModelForm):
    category = forms.MultipleChoiceField(choices=Exp.CATEGORIES, widget=forms.CheckboxSelectMultiple())
    class Meta:
        model = Exp

views.py

def view_exp(request):
    if request.method == "POST":
        form = ExpForm(request.POST)
        if form.is_valid():
        ...

多选选项在表单中正确显示，但是当我选择多个选项时，form.is_valid()中的views.py将返回false并显示AttributeError: 'str' object has no attribute 'status_code错误。我知道我收到str而不是HttpResponse对象，但无法弄清楚如何修复此错误。任何帮助表示赞赏。

注意：同一表单中还有其他类型为CharField的字段。

这是追溯：

Traceback (most recent call last):
  File "/software/python/python-2.7.3/lib/python2.7/site-packages/django/core/handlers/base.py", line 187, in get_response
    response = middleware_method(request, response)
  File "/software/python/python-2.7.3/lib/python2.7/site-packages/django/middleware/common.py", line 106, in process_response
    if response.status_code == 404:
AttributeError: 'str' object has no attribute 'status_code'

Answer 1

感谢您的宝贵意见和早上喝咖啡，我深入了解了我的代码。修复错误后，我得到了它的工作。这是我在models.py中的错误：

class Exp(models.Model):

    # The first element in each tuple is the actual value to be stored. The second element is the human-readable name for the option.
    CATEGORIES = ( ('Inc', 'Inc'),\
                 ('Clv','Clv'), \
                 ('Dys', 'Dys'), \
                 ('Hom', 'Hom'), \
                 ('Syn','Syn') )

    #category = models.CharField(max_length=100, choices=CATEGORIES) <--- culprit

我没有意识到我对类别的原始定义仍然挥之不去。我在models.py中评论说它按预期工作了！

这是我的forms.py：

class ExpForm(ModelForm):
    category = forms.MultipleChoiceField(choices=Exp.CATEGORIES,widget=forms.CheckboxSelectMultiple())
    class Meta:
        model = Exp

这是我的views.py：

def view_experiment(request):
    if request.method == "POST":

        form = ExpForm(request.POST)
        if form.is_valid():
            picked = form.cleaned_data.get('category')
            category = ",".join([str(c) for c in picked])
            return HttpResponse("Multichoiceselect returned {0}".format(category))
        else:
            return "[ERROR] from views: {0}".format(form.errors)
    else:
        form = ExpForm()
    return render(request, 'template.html', {'form': form})

选定的多个选项将作为unicode字符串列表返回。然后我将列表元素转换为字符串并用逗号连接它们。

Also see this

Django multiselect choice AttributeError：＆＃39; str＆＃39;对象没有属性＆＃39; status_code＆＃39;

1 个答案: