对一个字段使用 wtform 验证时 "Not a valid choice" 是什么意思？
What is meant by "Not a valid choice" when using wtform validation for one field?
我在使用动态选项验证时收到一条无法理解的错误消息（其中一个 select 字段中的选项取决于另一个 select 字段中的选择。但是我不能 select 一个地区一旦 select 就成为一个城市。为什么不呢？必须做什么？
for city in montaomodel.City.all().fetch(99999): # TODO: only do this for the region
try:
form.area.choices.insert(long(city.key().id()),
(str(city.key().id()), 'Select...'))
except:
pass
我用于插入和验证的整个代码块如下。
class AdLister(BaseRequestHandler,
blobstore_handlers.BlobstoreUploadHandler):
csrf_protect = False
def post(self):
logging.info("i post")
ad = Ad()
if users.get_current_user():
ad.user = users.get_current_user()
if self.current_user is not None:
try:
ad.usr = self.current_user
except Exception, e:
logging.info('exception %s' % str(e))
logging.info("i post2")
if self.request.get('type'):
ad.type = self.request.get('type')
if self.request.get('address'):
ad.address = self.request.get('address')
if self.request.get('rooms'):
ad.number_of_rooms = int(self.request.get('rooms'))
if self.request.get('size'):
ad.size = float(self.request.get('size'))
if self.request.get('regdate'):
ad.regdate = int(self.request.get('regdate'))
if self.request.get('mileage'):
ad.mileage = int(self.request.get('mileage'))
ad.category = self.request.get('category_group')
form = AdForm(self.request.params)
logging.info("i post23")
if self.request.get('area'):
for city in montaomodel.City.all().fetch(99999): # TODO: only do this for the region
#logging.info("i post232")
#logging.info("region%s" , city.region.key().id())
try:
form.area.choices.insert(str(long(city.key().id())),
(str(city.key().id()), 'Select...'))
except:
pass
logging.info("i post3")
if form.validate():
title = to_unicode_or_bust(form.title.data)
#unicode(form.title.data, 'utf-8')
ad.title = title
self.session['title'] = ad.title
name = to_unicode_or_bust(form.name.data) #, 'utf-8')
ad.name = name
self.session['name'] = ad.name
ad.email = form.email.data
self.session['email'] = ad.email
ad.phoneview = form.phoneview.data
self.session['phoneview'] = ad.phoneview
try:
if form.phonenumber.data:
ad.phonenumber = form.phonenumber.data
self.session['phonenumber'] = ad.phonenumber
except:
pass
text = to_unicode_or_bust(form.text.data) # , 'utf8')
titletest = to_unicode_or_bust(form.title.data)
ad.text = text
self.session['text'] = ad.text
ad.price = form.price.data.replace(' ', '').replace(',00',
'').replace('.00', '')
try:
if form.price.data:
ad.integer_price = form.price.data.replace(' ', ''
).replace(',00', '').replace('.00', '')
except:
pass
self.session['price'] = ad.price
ad.url = self.request.host
self.session['url'] = self.request.host
ad.place = self.request.get('place')
self.session['place'] = ad.place
ad.postaladress = self.request.get('place')
self.session['postaladress'] = ad.postaladress
ad.put()
self.session['ad_id'] = ad.key().id()
else:
self.render('createnewad.html', {
'user': self.current_user,
'session': self.auth.get_user_by_session(),
'request': self.request,
'form': form,
'name': to_unicode_or_bust(form.name.data) #.encode('utf-8')
})
return
if self.request.get('currency'):
ad.currency = self.request.get('currency')
self.session['currency'] = ad.currency
if self.request.get('cg'):
ad.category = self.request.get('cg')
self.session['category'] = ad.category
if self.request.get('company_ad') == '1':
ad.company_ad = True
self.session['company_ad'] = 'True'
ad.put()
ad.url = self.request.host
for upload in self.get_uploads():
try:
img = Image(reference=ad)
img.primary_image = upload.key()
image_url = images.get_serving_url(str(upload.key()), size=640)
img.put()
ad.hasimages = True
ad.image_url = images.get_serving_url(str(upload.key()), size=640)
ad.put()
ad.blobs.append(upload.key())
ad.put()
except Exception, e:
logging.error('There was an exception:%s' % str(e))
pass
ad.published = False
if self.request.get('area'):
city = \
montaomodel.City.get_by_id(long(self.request.get('area'
)))
region = montaomodel.Region.get(city.region.key())
ad.cities.append(city.key())
ad.regions.append(region.key())
ad.city = unicode(city.name)
ad.region = unicode(region.name)
ad.put()
if self.current_user:
ad.userID = str(self.current_user.auth_ids[0])
ad.put()
ad.usr = self.current_user.key.to_old_key()
ad.put()
image = ad.matched_images.get()
image_url = None
if image:
if image.primary_image:
try:
image_url = \
images.get_serving_url(str(image.primary_image.key()),
size=640)
except Exception, e:
image_url = '/images/' + str(image.key().id()) \
+ '_small.jpg'
else:
image_url = '/images/' + str(image.key().id()) \
+ '_small.jpg'
imv = []
for i in ad.matched_images:
if i.primary_image:
try:
i1 = \
images.get_serving_url(str(i.primary_image.key()))
imv.append(i1)
except Exception, e:
i1 = '/images/' + str(image.key().id()) \
+ '_small.jpg'
imv.append(i1)
if ad.price: # and doesn't contain separators
try:
price = \
i18n.I18n(self.request).format_decimal(int(ad.price))
except Exception, e:
price = ad.price
else:
price = ad.price
self.render('preview.html', {
'user': self.current_user,
'session': self.auth.get_user_by_session(),
'request': self.request,
'ad': ad,
'image_url': image_url,
'imv': imv,
'len': len(imv),
'form': PreviewAdForm(),
'price': price,
})
我的表格 class 如下所示。
class AdForm(Form):
categories = [
('1', _('All categories')),
('disabled', _('VEHICLES')),
('2010', _('Cars')),
('3', _('Motorcycles')),
('4', _('Accessories & Parts')),
('disabled', _('PROPERTIES')),
('7', _('Apartments')),
('8', _('Houses')),
('9', _('Commercial properties')),
('10', _('Land')),
('disabled', _('ELECTRONICS')),
('12', _('Mobile phones & Gadgets')),
('13', _('TV/Audio/Video/Cameras')),
('14', _('Computers')),
('disabled', _('HOME & PERSONAL ITEMS')),
('16', _('Home & Garden')),
('17', _('Clothes/Watches/Accessories')),
('18', _('For Children')),
('disabled', _('LEISURE/SPORTS/HOBBIES')),
('20', _('Sports & Outdoors')),
('21', _('Hobby & Collectables')),
('22', _('Music/Movies/Books')),
('23', _('Pets')),
('20', _('BUSINESS TO BUSINESS')),
('24', _('Hobby & Collectables')),
('25', _('Professional/Office equipment')),
('26', _('Business for sale')),
('disabled', _('JOBS & SERVICES')),
('28', _('Jobs')),
('29', _('Services')),
('30', _('Events & Catering')),
('31', _('Others')),
('1000', _('Sports & Outdoors')),
('1010', _('Hobby & Collectables')),
('1020', _('Hobby & Collectables')),
('1030', _('Music/Movies/Books')),
('1050', _('Pets')),
('1080', _('BUSINESS TO BUSINESS')),
('1100', _('Hobby & Collectables')),
('1090', _('Professional/Office equipment')),
('2010', _('Business for sale')),
('2030', _('Sports & Outdoors')),
('2040', _('Hobby & Collectables')),
('2080', _('Music/Movies/Books')),
('2070', _('Pets')),
('3000', _('BUSINESS TO BUSINESS')),
('3040', _('Hobby & Collectables')),
('3050', _('Professional/Office equipment')),
('3060', _('Business for sale')),
('4000', _('Sports & Outdoors')),
('4010', _('Hobby & Collectables')),
('4020', _('Music/Movies/Books')),
('4040', _('Pets')),
('4030', _('BUSINESS TO BUSINESS')),
('4090', _('Hobby & Collectables')),
('4060', _('Professional/Office equipment')),
('4070', _('Business for sale')),
('5030', _('Music/Movies/Books')),
('5020', _('Pets')),
('5010', _('BUSINESS TO BUSINESS')),
('5040', _('Hobby & Collectables')),
('6010', _('Professional/Office equipment')),
('6020', _('Business for sale')),
('6030', _('Music/Movies/Books')),
('6040', _('Pets')),
('7010', _('BUSINESS TO BUSINESS')),
('Other', _('Hobby & Collectables')),
]
regions = [('', _('Choose')), ('3', _('Delhi')), ('4', _('Maharasta'
)), ('7', _('Gujarat'))]
cities = [('', _('«Choose city»')), ('3', _('Mumbai')), ('4',
_('Delhi'))]
nouser = HiddenField(_('No user')) # dummy variable to know whether user is logged in
name = TextField(_('Name'),
[validators.Required(message=_('Name is required'
))], widget=MontaoTextInput())
title = TextField(_('Subject'),
[validators.Required(message=_('Subject is required'
))], widget=MontaoTextInput())
text = TextAreaField(_('Ad text'),
[validators.Required(message=_('Text is required'
))], widget=MontaoTextArea())
phonenumber = TextField(_('Phone'), [validators.Optional()])
type = TextField(_('Type'),
[validators.Required(message=_('Type is required'
))])
phoneview = BooleanField(_('Display phone number on site'))
price = TextField(_('Price'), [validators.Regexp('^[0-9]+$',
message=_(
'This is not an integer number, please see the example and try again'
)), validators.Optional()], widget=MontaoTextInput())
email = TextField(_('Email'),
[validators.Required(message=_('Email is required'
)),
validators.Email(message=_('Your email is invalid'
))], widget=MontaoTextInput())
area = SelectField(_('City'), choices=cities,
validators=[validators.Optional()])
category_group = SelectField(_('Category'), choices=categories,
validators=[validators.Required(message=_('Category is required'
))])
def validate_name(form, field):
if len(field.data) > 50:
raise ValidationError(_('Name must be less than 50 characters'
))
def validate_email(form, field):
if len(field.data) > 60:
raise ValidationError(_('Email must be less than 60 characters'
))
def validate_price(form, field):
if len(field.data) > 8:
raise ValidationError(_('Price must be less than 9 integers'
))
def validate_area(form, field):
if len(field.data) > 888:
raise ValidationError(_('Dummy validator'
))
这里有一个代码示例（1个省有N个城市）：
class ProvinceField(forms.ModelChoiceField):
def __init__(self, query=Province.objects.all().order_by('name')):
super(ProvinceField, self).__init__(queryset=query)
class CityField(forms.ModelChoiceField):
def __init__(self, query=City.objects.none()):
super(CityField, self).__init__(queryset=query)
class CityForm(forms.Form)):
province = ProvinceField()
city = CityField()
def __init__(self, *args, **kwargs):
super(CityForm, self).__init__(*args, **kwargs)
if kwargs and kwargs.get('data').get('province'):
try:
province = Province.objects.get(pk=kwargs.get('data').get('province'))
except ObjectDoesNotExist:
self.fields['city'].queryset = City.objects.none()
else:
self.fields['city'].queryset = province.cities.all().order_by('name')
else:
self.fields['city'].queryset = City.objects.none()
希望这段代码对您有所帮助！
我在使用动态选项验证时收到一条无法理解的错误消息（其中一个 select 字段中的选项取决于另一个 select 字段中的选择。但是我不能 select 一个地区一旦 select 就成为一个城市。为什么不呢？必须做什么？
for city in montaomodel.City.all().fetch(99999): # TODO: only do this for the region
try:
form.area.choices.insert(long(city.key().id()),
(str(city.key().id()), 'Select...'))
except:
pass
我用于插入和验证的整个代码块如下。
class AdLister(BaseRequestHandler,
blobstore_handlers.BlobstoreUploadHandler):
csrf_protect = False
def post(self):
logging.info("i post")
ad = Ad()
if users.get_current_user():
ad.user = users.get_current_user()
if self.current_user is not None:
try:
ad.usr = self.current_user
except Exception, e:
logging.info('exception %s' % str(e))
logging.info("i post2")
if self.request.get('type'):
ad.type = self.request.get('type')
if self.request.get('address'):
ad.address = self.request.get('address')
if self.request.get('rooms'):
ad.number_of_rooms = int(self.request.get('rooms'))
if self.request.get('size'):
ad.size = float(self.request.get('size'))
if self.request.get('regdate'):
ad.regdate = int(self.request.get('regdate'))
if self.request.get('mileage'):
ad.mileage = int(self.request.get('mileage'))
ad.category = self.request.get('category_group')
form = AdForm(self.request.params)
logging.info("i post23")
if self.request.get('area'):
for city in montaomodel.City.all().fetch(99999): # TODO: only do this for the region
#logging.info("i post232")
#logging.info("region%s" , city.region.key().id())
try:
form.area.choices.insert(str(long(city.key().id())),
(str(city.key().id()), 'Select...'))
except:
pass
logging.info("i post3")
if form.validate():
title = to_unicode_or_bust(form.title.data)
#unicode(form.title.data, 'utf-8')
ad.title = title
self.session['title'] = ad.title
name = to_unicode_or_bust(form.name.data) #, 'utf-8')
ad.name = name
self.session['name'] = ad.name
ad.email = form.email.data
self.session['email'] = ad.email
ad.phoneview = form.phoneview.data
self.session['phoneview'] = ad.phoneview
try:
if form.phonenumber.data:
ad.phonenumber = form.phonenumber.data
self.session['phonenumber'] = ad.phonenumber
except:
pass
text = to_unicode_or_bust(form.text.data) # , 'utf8')
titletest = to_unicode_or_bust(form.title.data)
ad.text = text
self.session['text'] = ad.text
ad.price = form.price.data.replace(' ', '').replace(',00',
'').replace('.00', '')
try:
if form.price.data:
ad.integer_price = form.price.data.replace(' ', ''
).replace(',00', '').replace('.00', '')
except:
pass
self.session['price'] = ad.price
ad.url = self.request.host
self.session['url'] = self.request.host
ad.place = self.request.get('place')
self.session['place'] = ad.place
ad.postaladress = self.request.get('place')
self.session['postaladress'] = ad.postaladress
ad.put()
self.session['ad_id'] = ad.key().id()
else:
self.render('createnewad.html', {
'user': self.current_user,
'session': self.auth.get_user_by_session(),
'request': self.request,
'form': form,
'name': to_unicode_or_bust(form.name.data) #.encode('utf-8')
})
return
if self.request.get('currency'):
ad.currency = self.request.get('currency')
self.session['currency'] = ad.currency
if self.request.get('cg'):
ad.category = self.request.get('cg')
self.session['category'] = ad.category
if self.request.get('company_ad') == '1':
ad.company_ad = True
self.session['company_ad'] = 'True'
ad.put()
ad.url = self.request.host
for upload in self.get_uploads():
try:
img = Image(reference=ad)
img.primary_image = upload.key()
image_url = images.get_serving_url(str(upload.key()), size=640)
img.put()
ad.hasimages = True
ad.image_url = images.get_serving_url(str(upload.key()), size=640)
ad.put()
ad.blobs.append(upload.key())
ad.put()
except Exception, e:
logging.error('There was an exception:%s' % str(e))
pass
ad.published = False
if self.request.get('area'):
city = \
montaomodel.City.get_by_id(long(self.request.get('area'
)))
region = montaomodel.Region.get(city.region.key())
ad.cities.append(city.key())
ad.regions.append(region.key())
ad.city = unicode(city.name)
ad.region = unicode(region.name)
ad.put()
if self.current_user:
ad.userID = str(self.current_user.auth_ids[0])
ad.put()
ad.usr = self.current_user.key.to_old_key()
ad.put()
image = ad.matched_images.get()
image_url = None
if image:
if image.primary_image:
try:
image_url = \
images.get_serving_url(str(image.primary_image.key()),
size=640)
except Exception, e:
image_url = '/images/' + str(image.key().id()) \
+ '_small.jpg'
else:
image_url = '/images/' + str(image.key().id()) \
+ '_small.jpg'
imv = []
for i in ad.matched_images:
if i.primary_image:
try:
i1 = \
images.get_serving_url(str(i.primary_image.key()))
imv.append(i1)
except Exception, e:
i1 = '/images/' + str(image.key().id()) \
+ '_small.jpg'
imv.append(i1)
if ad.price: # and doesn't contain separators
try:
price = \
i18n.I18n(self.request).format_decimal(int(ad.price))
except Exception, e:
price = ad.price
else:
price = ad.price
self.render('preview.html', {
'user': self.current_user,
'session': self.auth.get_user_by_session(),
'request': self.request,
'ad': ad,
'image_url': image_url,
'imv': imv,
'len': len(imv),
'form': PreviewAdForm(),
'price': price,
})
我的表格 class 如下所示。
class AdForm(Form):
categories = [
('1', _('All categories')),
('disabled', _('VEHICLES')),
('2010', _('Cars')),
('3', _('Motorcycles')),
('4', _('Accessories & Parts')),
('disabled', _('PROPERTIES')),
('7', _('Apartments')),
('8', _('Houses')),
('9', _('Commercial properties')),
('10', _('Land')),
('disabled', _('ELECTRONICS')),
('12', _('Mobile phones & Gadgets')),
('13', _('TV/Audio/Video/Cameras')),
('14', _('Computers')),
('disabled', _('HOME & PERSONAL ITEMS')),
('16', _('Home & Garden')),
('17', _('Clothes/Watches/Accessories')),
('18', _('For Children')),
('disabled', _('LEISURE/SPORTS/HOBBIES')),
('20', _('Sports & Outdoors')),
('21', _('Hobby & Collectables')),
('22', _('Music/Movies/Books')),
('23', _('Pets')),
('20', _('BUSINESS TO BUSINESS')),
('24', _('Hobby & Collectables')),
('25', _('Professional/Office equipment')),
('26', _('Business for sale')),
('disabled', _('JOBS & SERVICES')),
('28', _('Jobs')),
('29', _('Services')),
('30', _('Events & Catering')),
('31', _('Others')),
('1000', _('Sports & Outdoors')),
('1010', _('Hobby & Collectables')),
('1020', _('Hobby & Collectables')),
('1030', _('Music/Movies/Books')),
('1050', _('Pets')),
('1080', _('BUSINESS TO BUSINESS')),
('1100', _('Hobby & Collectables')),
('1090', _('Professional/Office equipment')),
('2010', _('Business for sale')),
('2030', _('Sports & Outdoors')),
('2040', _('Hobby & Collectables')),
('2080', _('Music/Movies/Books')),
('2070', _('Pets')),
('3000', _('BUSINESS TO BUSINESS')),
('3040', _('Hobby & Collectables')),
('3050', _('Professional/Office equipment')),
('3060', _('Business for sale')),
('4000', _('Sports & Outdoors')),
('4010', _('Hobby & Collectables')),
('4020', _('Music/Movies/Books')),
('4040', _('Pets')),
('4030', _('BUSINESS TO BUSINESS')),
('4090', _('Hobby & Collectables')),
('4060', _('Professional/Office equipment')),
('4070', _('Business for sale')),
('5030', _('Music/Movies/Books')),
('5020', _('Pets')),
('5010', _('BUSINESS TO BUSINESS')),
('5040', _('Hobby & Collectables')),
('6010', _('Professional/Office equipment')),
('6020', _('Business for sale')),
('6030', _('Music/Movies/Books')),
('6040', _('Pets')),
('7010', _('BUSINESS TO BUSINESS')),
('Other', _('Hobby & Collectables')),
]
regions = [('', _('Choose')), ('3', _('Delhi')), ('4', _('Maharasta'
)), ('7', _('Gujarat'))]
cities = [('', _('«Choose city»')), ('3', _('Mumbai')), ('4',
_('Delhi'))]
nouser = HiddenField(_('No user')) # dummy variable to know whether user is logged in
name = TextField(_('Name'),
[validators.Required(message=_('Name is required'
))], widget=MontaoTextInput())
title = TextField(_('Subject'),
[validators.Required(message=_('Subject is required'
))], widget=MontaoTextInput())
text = TextAreaField(_('Ad text'),
[validators.Required(message=_('Text is required'
))], widget=MontaoTextArea())
phonenumber = TextField(_('Phone'), [validators.Optional()])
type = TextField(_('Type'),
[validators.Required(message=_('Type is required'
))])
phoneview = BooleanField(_('Display phone number on site'))
price = TextField(_('Price'), [validators.Regexp('^[0-9]+$',
message=_(
'This is not an integer number, please see the example and try again'
)), validators.Optional()], widget=MontaoTextInput())
email = TextField(_('Email'),
[validators.Required(message=_('Email is required'
)),
validators.Email(message=_('Your email is invalid'
))], widget=MontaoTextInput())
area = SelectField(_('City'), choices=cities,
validators=[validators.Optional()])
category_group = SelectField(_('Category'), choices=categories,
validators=[validators.Required(message=_('Category is required'
))])
def validate_name(form, field):
if len(field.data) > 50:
raise ValidationError(_('Name must be less than 50 characters'
))
def validate_email(form, field):
if len(field.data) > 60:
raise ValidationError(_('Email must be less than 60 characters'
))
def validate_price(form, field):
if len(field.data) > 8:
raise ValidationError(_('Price must be less than 9 integers'
))
def validate_area(form, field):
if len(field.data) > 888:
raise ValidationError(_('Dummy validator'
))
这里有一个代码示例（1个省有N个城市）：
class ProvinceField(forms.ModelChoiceField):
def __init__(self, query=Province.objects.all().order_by('name')):
super(ProvinceField, self).__init__(queryset=query)
class CityField(forms.ModelChoiceField):
def __init__(self, query=City.objects.none()):
super(CityField, self).__init__(queryset=query)
class CityForm(forms.Form)):
province = ProvinceField()
city = CityField()
def __init__(self, *args, **kwargs):
super(CityForm, self).__init__(*args, **kwargs)
if kwargs and kwargs.get('data').get('province'):
try:
province = Province.objects.get(pk=kwargs.get('data').get('province'))
except ObjectDoesNotExist:
self.fields['city'].queryset = City.objects.none()
else:
self.fields['city'].queryset = province.cities.all().order_by('name')
else:
self.fields['city'].queryset = City.objects.none()
希望这段代码对您有所帮助！