form.is_valid() 总是返回 false [英] form.is_valid() always returning false

问题描述

Form.is_valid() 总是返回 false，它从不显示任何类型的错误.以下是来自 forms.py、views.py 和 template/transaction_add_page.html

的代码片段

表格

class TransactionForm(forms.Form):account = forms.ModelChoiceField(queryset=Account.objects.none())交易 = 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):如果 self.cleaned_data 中的帐户":account = self.cleaned_data['account']返回帐户raise forms.ValidationError('请选择一个帐户.')def clean_transactions(self):如果 self.cleaned_data 中的交易":交易 = self.cleaned_data['交易']退货交易raise forms.ValidationError('至少需要一笔交易.')

查看

@login_requireddef transaction_add_page(请求):如果 request.method == 'POST':form = TransactionForm(request.POST)如果 form.is_valid():variables = RequestContext(request, {'account': form.clean_account(), 'transactions': form.clean_transactions()})return render_to_response('transaction_confirm_page.html', 变量)form = TransactionForm(request.user)变量 = RequestContext(request, {'form': form})return render_to_response('transaction_add_page.html', 变量)

模板

{% 扩展 "base.html" %}{% 区块标题 %}添加交易{% endblock %}{% block head %}添加交易{% endblock %}{% 块内容 %}<form method="post" action=".">{{ form.non_field_errors }}{{ form.errors }}{% 用于表单 %} 中的字段<div>{{ field.errors }}{{ field.label_tag }}:{{ field }}

{% 结束为 %}<input type="submit" value="添加交易"/></表单>{% 结束块 %}

解决方案

如果你在初始化器上设置了用户参数，你需要使用它.

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

Form.is_valid() is always returning false, and it never shows any kind of error. Following is the code snippet from forms.py, views.py and template/transaction_add_page.html

Form

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.')

View

@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)

Template

{% 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 %}

解决方案

if you set on the initializer the user argument, you need to use it.

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

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