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我收到Django错误：expected string or buffer当我提交我的Django窗体。我已经根据同样的问题阅读了一些SO问题，但似乎并不奏效。Django错误：预期的字符串或缓冲区
这是我的models.py形式：
class BirthCertificate(models.Model):
lastname = models.CharField(max_length=30, null=False, verbose_name='Nom de famille')
firstname = models.CharField(max_length=30, null=False, verbose_name='Prénom(s)')
sex = models.CharField(max_length=8, choices=SEX_CHOICES, verbose_name='Sexe')
birthday = models.DateField(null=False, verbose_name='Date de naissance')
birthhour = models.TimeField(null=True, verbose_name='Heure de naissance')
birthcity = models.CharField(max_length=30, null=False, verbose_name='Ville de naissance')
birthcountry = CountryField(blank_label='Sélectionner un pays', verbose_name='Pays de naissance')
fk_parent1 = models.ForeignKey(Person, related_name='ID_Parent1', verbose_name='ID parent1', null=False)
fk_parent2 = models.ForeignKey(Person, related_name='ID_Parent2', verbose_name='ID parent2', null=False)
mairie = models.CharField(max_length=30, null=False, verbose_name='Mairie')
social_number = models.CharField(max_length=30, null=True, verbose_name='numero social', unique=True)
created = models.DateTimeField(auto_now_add=True)
这是我forms.py：
class BirthCertificateForm2(forms.ModelForm):
fk_parent1 = CustomLabelModelChoiceField(Person.objects.filter(), required=False, label = "Père", label_func=lambda obj: '%s %s %s' % (obj.lastname, obj.firstname, obj.social_number), empty_label=None)
fk_parent2 = CustomLabelModelChoiceField(Person.objects.filter(), required=False, label = "Mère", label_func=lambda obj: '%s %s %s' % (obj.lastname, obj.firstname, obj.social_number), empty_label=None)
lastname = CustomLabelModelChoiceField(Person.objects.filter(), required=False, label = "Nom", label_func=lambda obj: '%s' % (obj.lastname), empty_label=None)
firstname = CustomLabelModelChoiceField(Person.objects.filter(), required=False, label = "Prénom", label_func=lambda obj: '%s' % (obj.firstname), empty_label=None)
birthday = CustomLabelModelChoiceField(Person.objects.filter(), required=False, label = "Date de Naissance", label_func=lambda obj: '%s' % (obj.birthday), empty_label=None)
birthcity = CustomLabelModelChoiceField(Person.objects.filter(), required=False, label = "Ville de Naissance", label_func=lambda obj: '%s' % (obj.birthcity), empty_label=None)
sex = CustomLabelModelChoiceField(Person.objects.filter(), required=False, label = "Sexe", label_func=lambda obj: '%s' % (obj.sex), empty_label=None)
birthcountry = CustomLabelModelChoiceField(Person.objects.filter(), required=False, label = "Pays de Naissance", label_func=lambda obj: '%s' % (obj.birthcountry), empty_label=None)
mairie = forms.CharField(widget=forms.HiddenInput(), initial=Mairie.objects.get(id=1).city.encode('utf-8'))
social_number = forms.CharField(widget=forms.HiddenInput(),required=False)
class Meta :
model = BirthCertificate
fields = ['lastname', 'firstname', 'sex', 'birthday', 'birthhour', 'birthcity', 'birthcountry','fk_parent1', 'fk_parent2', 'mairie', 'social_number']
widgets = {'country': CountrySelectWidget()}
def __init__(self, *args, **kwargs):
super(BirthCertificateForm2, self).__init__(*args, **kwargs)
for key, value in self.fields.iteritems() :
self.fields[key].widget.attrs.update({'class':'form-fields'})
最后我的功能views.py：
def BirthCertificate_Form_unique_number(request) :
#User fill some fields
query_social_number = request.GET.get('social_number')
query_social_number_father = request.GET.get('social_number_father')
query_social_number_mother = request.GET.get('social_number_mother')
if request.method == 'POST':
form = BirthCertificateForm2(request.POST or None)
if form.is_valid() : # Vérification sur la validité des données
post = form.save()
return HttpResponseRedirect(reverse('BC_treated', kwargs={'id': post.id}))
else:
form = BirthCertificateForm2()
parent1 = Person.objects.filter(social_number=query_social_number_father)
parent2 = Person.objects.filter(social_number=query_social_number_mother)
individu = Person.objects.filter(social_number=query_social_number)
form = BirthCertificateForm2(request.POST or None)
form.fields['fk_parent1'].queryset = parent1
form.fields['fk_parent2'].queryset = parent2
form.fields['lastname'].queryset = individu
form.fields['firstname'].queryset = individu
form.fields['birthday'].queryset = individu
form.fields['birthcity'].queryset = individu
form.fields['birthcountry'].queryset = individu
form.fields['sex'].queryset = individu
form.fields['social_number'].queryset = individu
print request.POST
context = {
"form" : form,
}
return render(request, 'BC_form2.html', context)
我函数允许最初使用来自其他模型的数据填充我的BirthCertificate表单。
但是当我提交我的表单时，我得到了标题错误。
这是回溯：
Environment:
Request Method: POST
Request URL: http://localhost:8000/BirthCertificate/formulaire2?social_number=1+87+10+STRASBOURG+-+583403&social_number_father=1+99+12+BREST+-+765533&social_number_mother=1+87+10+STRASBOURG+-+583403
Django Version: 1.10.3
Python Version: 2.7.12
Installed Applications:
['django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'BirthCertificate',
'Identity',
'bootstrapform',
'Accueil',
'django_countries',
'log',
'Mairie',
'Table',
'Recensement',
'Configurations',
'debug_toolbar',
'chartit',
'Mariage']
Installed Middleware:
['django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.locale.LocaleMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.middleware.gzip.GZipMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
'django.middleware.security.SecurityMiddleware',
'debug_toolbar.middleware.DebugToolbarMiddleware']
Traceback:
File "/usr/local/lib/python2.7/site-packages/django/core/handlers/exception.py" in inner
39. response = get_response(request)
File "/usr/local/lib/python2.7/site-packages/django/core/handlers/base.py" in _legacy_get_response
249. response = self._get_response(request)
File "/usr/local/lib/python2.7/site-packages/django/core/handlers/base.py" in _get_response
187. response = self.process_exception_by_middleware(e, request)
File "/usr/local/lib/python2.7/site-packages/django/core/handlers/base.py" in _get_response
185. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/Users/valentinjungbluth/Desktop/Django/Etat_civil/BirthCertificate/views.py" in BirthCertificate_Form_unique_number
81. if form.is_valid() : # Vérification sur la validité des données
File "/usr/local/lib/python2.7/site-packages/django/forms/forms.py" in is_valid
169. return self.is_bound and not self.errors
File "/usr/local/lib/python2.7/site-packages/django/forms/forms.py" in errors
161. self.full_clean()
File "/usr/local/lib/python2.7/site-packages/django/forms/forms.py" in full_clean
372. self._post_clean()
File "/usr/local/lib/python2.7/site-packages/django/forms/models.py" in _post_clean
398. self.instance.full_clean(exclude=exclude, validate_unique=False)
File "/usr/local/lib/python2.7/site-packages/django/db/models/base.py" in full_clean
1210. self.clean_fields(exclude=exclude)
File "/usr/local/lib/python2.7/site-packages/django/db/models/base.py" in clean_fields
1252. setattr(self, f.attname, f.clean(raw_value, self))
File "/usr/local/lib/python2.7/site-packages/django/db/models/fields/__init__.py" in clean
590. value = self.to_python(value)
File "/usr/local/lib/python2.7/site-packages/django/db/models/fields/__init__.py" in to_python
1237. parsed = parse_date(value)
File "/usr/local/lib/python2.7/site-packages/django/utils/dateparse.py" in parse_date
60. match = date_re.match(value)
Exception Type: TypeError at /BirthCertificate/formulaire2
Exception Value: expected string or buffer
编辑：
我CustomLabelModelChoiceField类的样子：
class CustomLabelModelChoiceField(forms.ModelChoiceField):
def __init__(self, *args, **kwargs):
self._label_from_instance = kwargs.pop('label_func', force_text)
super(CustomLabelModelChoiceField, self).__init__(*args, **kwargs)
def label_from_instance(self, obj):
return self._label_from_instance(obj)
而我的HTML文件：
{% extends 'Base_BirthCertificate_Naissance.html' %}
{% load staticfiles %}
{% block title %}
<h3> <span class="glyphicon glyphicon-file"></span>Acte de Naissance à partir d'un numéro unique</align> </h3>
{% endblock %}
{% block content %}
<style>
form > input {
width:20%;
}
form {
list-style: none;
}
</style>
<!-- ############### -->
<!-- Page principale -->
<!-- ############### -->
<form class = "form" method="GET" action="">
<h4> Numéro unique de l'individu : </h4>
<input type="text" name="social_number" placeholder="N° unique de l'individu" value="{{request.GET.social_number}}">
<h4> Nom de famille du père et de la mère : </h4>
<input type="text" name="social_number_father" placeholder="N° unique du père" value="{{ request.GET.social_number_father }}">
<input type="text" name="social_number_mother" placeholder="N° unique de la mère" value="{{ request.GET.social_number_mother }}">
<input class="button" type="submit" value="Valider">
<br></br>
</form>
<form class = "form" method='POST' action=''> {% csrf_token %}
<br></br>
{{ form.as_p}} <!-- Display child part formulary -->
{{ value|date:"%d/%m/%Y" }}
<br></br>
<input class="button" type ="submit" value="Valider l'acte de naissance" />
</form>
{% endblock content %}
编辑2：
我从POST数据恢复的图片，这是一个可能解释我的错误expected string or buffer！我有int，我不知道为什么
你应该调试request.POST领域检查你正在接收哪种数据类型 – lapinkoira
我只需要做'print type（something）'？我认为这个错误可能是生日场的类型。因为在我的模型中它是一个DateTime格式，当我填充我的表单时，它是一个字符串对吗？ – Deadpool
你可以给你的'CustomLabelModelChoiceField'的代码吗？ – albar