form.is_valid（）總是返回false

Question

Form.is_valid（）總是返回false，並且它從不顯示任何類型的錯誤。以下是從forms.py，views.py和模板/ transaction_add_page.html

表

class TransactionForm(forms.Form): 
    account = forms.ModelChoiceField(queryset=Account.objects.none()) 
    transactions = forms.CharField(widget=forms.Textarea(attrs={'rows':'10', 'cols':'70'})) 

    def __init__(self, user, *args, **kwargs): 
    super(TransactionForm, self).__init__(*args, **kwargs) 
    self.fields['account'].queryset = Account.objects.filter(user=user) 

    def clean_account(self): 
    if 'account' in self.cleaned_data: 
     account = self.cleaned_data['account'] 
     return account 
    raise forms.ValidationError('Please select an account.') 

    def clean_transactions(self): 
    if 'transactions' in self.cleaned_data: 
     transactions = self.cleaned_data['transactions'] 
     return transactions 
    raise forms.ValidationError('At-least one transaction is required.') 

查看

@login_required 
def transaction_add_page(request): 
    if request.method == 'POST': 
    form = TransactionForm(request.POST) 
    if form.is_valid(): 
     variables = RequestContext(request, {'account': form.clean_account(), 'transactions': form.clean_transactions()}) 
     return render_to_response('transaction_confirm_page.html', variables) 

    form = TransactionForm(request.user) 
    variables = RequestContext(request, {'form': form}) 
    return render_to_response('transaction_add_page.html', variables) 

模板的代碼片段

{% extends "base.html" %} 
{% block title %}Add Transactions{% endblock %} 
{% block head %}Add Transactions{% endblock %} 
{% block content %} 
<form method="post" action="." > 
    {{ form.non_field_errors }} 
    {{ form.errors }} 

    {% for field in form %} 
    <div> 
     {{ field.errors }} 
     {{ field.label_tag }}: {{ field }} 
    </div> 
    {% endfor %} 

    <input type="submit" value="Add Transactions" /> 
</form> 
{% endblock %} 

Answer 1

如果您在初始化程序中設置了用戶參數，則需要使用它。

if request.method == 'POST': 
    form = TransactionForm(user=request.user, data=request.POST)