ValueError: dictionary update sequence element #0 has length 1; 2 is required

Question

I can not locate this error. Error is genereted after I added one field in disease that is contact and taggable manager in models If that is correct than is this error is generated due to Id field that I gave manually Help to me get out of this!!

• personal(myapp)/urls.py

   urlpatterns = [ url(r'^.*doctorsu/$', views.doctorsu.as_view(), name = 'doctorsu'), url(r'^.*disease/$', views.AddDisease.as_view(), name = 'AddDisease'), ] 

• mysite/urls.py

   urlpatterns = [ url(r'^$',include('personal.urls')), url(r'^taggit/',include('taggit_selectize.urls')), ] 

• models.py

   class DoctorSignup(models.Model): contact_regex = RegexValidator(regex=r'^[789]\\d{9}$',message="Phone number must be start with 7,8 or 9") doid = models.AutoField(verbose_name='Doctor Id',primary_key=True,default=0) email = models.CharField(max_length=50) contact = models.CharField(validators=[contact_regex]) class TaggedSymptoms(TaggedItemBase): content_object = models.ForeignKey("Disease") class TaggedMedicine(TaggedItemBase): content_object = models.ForeignKey("Disease") class Disease(models.Model): did = models.AutoField(verbose_name='Disease Id', primary_key=True,default=0) dName = models.CharField(max_length=20) dtype = models.CharField(max_length=10) symptoms = TaggableManager(through=TaggedSymptoms) symptoms.rel.related_name = "+" medi = TaggableManager(through=TaggedMedicine) medi.rel.related_name = "+" 

• views.py

   class doctorsu(TemplateView): template_name = 'personal/doctorsu.html' def get(self, request): dsform = DoctorSignupForm() data = DoctorSignup.objects.all() args = {'dsform': dsform,'data': data} return render(request,self.template_name,args) def post(self, request): dsform = DoctorSignupForm(request.POST) if dsform.is_valid(): dsform.save() cd = dsform.cleaned_data args = {'dsform': dsform , 'cd': cd} return render(request,self.template_name,args) return render(request, 'personal/doctorsu.html') class AddDisease(TemplateView): template_name = 'personal/disease.html' def get(self, request): dform = DiseaseForm() ddata = Disease.objects.all() args = {'dform': dform,'ddata': ddata} return render(request,self.template_name,args) def post(self, request): dform = DiseaseForm(request.POST) if dform.is_valid(): dform.save() cd = dform.cleaned_data args = {'dform': dform , 'cd': cd} return render(request,self.template_name,args) 

• forms.py

   class DoctorSignupForm(forms.ModelForm): dname = forms.CharField() email = forms.EmailField() contact = forms.RegexField(regex=r'^[789]\\d{9}$',error_messages="Enter valid phone no.") class Meta: model = DoctorSignup fields = "__all__" class DiseaseForm(ModelForm): dName = forms.CharField(help_text="Enter disease") symptoms = TagField(help_text="Enter symptoms separated by comma") medicine = TagField() class Meta: model = Disease fields = "__all__" 

• Traceback

  Traceback (most recent call last):

    File "manage.py", line 22, in <module> execute_from_command_line(sys.argv) File "C:\\Users\\Charmi Shah\\AppData\\Local\\Programs\\Python\\Python35-32\\lib\\site-packages\\django\\core\\management\\__init__.py", line 363, in execute_from_command_line utility.execute() File "C:\\Users\\Charmi Shah\\AppData\\Local\\Programs\\Python\\Python35-32\\lib\\site-packages\\django\\core\\management\\__init__.py", line 355, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File "C:\\Users\\Charmi Shah\\AppData\\Local\\Programs\\Python\\Python35-32\\lib\\site-packages\\django\\core\\management\\base.py", line 283, in run_from_argv self.execute(*args, **cmd_options) File "C:\\Users\\Charmi Shah\\AppData\\Local\\Programs\\Python\\Python35-32\\lib\\site-packages\\django\\core\\management\\base.py", line 327, in execute self.check() File "C:\\Users\\Charmi Shah\\AppData\\Local\\Programs\\Python\\Python35-32\\lib\\site-packages\\django\\core\\management\\base.py", line 359, in check include_deployment_checks=include_deployment_checks, File "C:\\Users\\Charmi Shah\\AppData\\Local\\Programs\\Python\\Python35-32\\lib\\site-packages\\django\\core\\management\\base.py", line 346, in _run_checks return checks.run_checks(**kwargs) File "C:\\Users\\Charmi Shah\\AppData\\Local\\Programs\\Python\\Python35-32\\lib\\site-packages\\django\\core\\checks\\registry.py", line 81, in run_checks new_errors = check(app_configs=app_configs) File "C:\\Users\\Charmi Shah\\AppData\\Local\\Programs\\Python\\Python35-32\\lib\\site-packages\\django\\core\\checks\\urls.py", line 16, in check_url_config return check_resolver(resolver) File "C:\\Users\\Charmi Shah\\AppData\\Local\\Programs\\Python\\Python35-32\\lib\\site-packages\\django\\core\\checks\\urls.py", line 26, in check_resolver return check_method() File "C:\\Users\\Charmi Shah\\AppData\\Local\\Programs\\Python\\Python35-32\\lib\\site-packages\\django\\urls\\resolvers.py", line 254, in check for pattern in self.url_patterns: File "C:\\Users\\Charmi Shah\\AppData\\Local\\Programs\\Python\\Python35-32\\lib\\site-packages\\django\\utils\\functional.py", line 35, in __get__ res = instance.__dict__[self.name] = self.func(instance) File "C:\\Users\\Charmi Shah\\AppData\\Local\\Programs\\Python\\Python35-32\\lib\\site-packages\\django\\urls\\resolvers.py", line 405, in url_patterns patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module) File "C:\\Users\\Charmi Shah\\AppData\\Local\\Programs\\Python\\Python35-32\\lib\\site-packages\\django\\utils\\functional.py", line 35, in __get__ res = instance.__dict__[self.name] = self.func(instance) File "C:\\Users\\Charmi Shah\\AppData\\Local\\Programs\\Python\\Python35-32\\lib\\site-packages\\django\\urls\\resolvers.py", line 398, in urlconf_module return import_module(self.urlconf_name) File "C:\\Users\\Charmi Shah\\AppData\\Local\\Programs\\Python\\Python35-32\\lib\\importlib\\__init__.py", line 126, in import_module return _bootstrap._gcd_import(name[level:], package, level) File "<frozen importlib._bootstrap>", line 986, in _gcd_import File "<frozen importlib._bootstrap>", line 969, in _find_and_load File "<frozen importlib._bootstrap>", line 958, in _find_and_load_unlocked File "<frozen importlib._bootstrap>", line 673, in _load_unlocked File "<frozen importlib._bootstrap_external>", line 665, in exec_module File "<frozen importlib._bootstrap>", line 222, in _call_with_frames_removed File "E:\\IT\\project\\program\\20-8-17\\mysite\\mysite\\urls.py", line 7, in <module> url(r'^$',include('personal.urls')), File "C:\\Users\\Charmi Shah\\AppData\\Local\\Programs\\Python\\Python35-32\\lib\\site-packages\\django\\conf\\urls\\__init__.py", line 50, in include urlconf_module = import_module(urlconf_module) File "C:\\Users\\Charmi Shah\\AppData\\Local\\Programs\\Python\\Python35-32\\lib\\importlib\\__init__.py", line 126, in import_module return _bootstrap._gcd_import(name[level:], package, level) File "<frozen importlib._bootstrap>", line 986, in _gcd_import File "<frozen importlib._bootstrap>", line 969, in _find_and_load File "<frozen importlib._bootstrap>", line 958, in _find_and_load_unlocked File "<frozen importlib._bootstrap>", line 673, in _load_unlocked File "<frozen importlib._bootstrap_external>", line 665, in exec_module File "<frozen importlib._bootstrap>", line 222, in _call_with_frames_removed File "E:\\IT\\project\\program\\20-8-17\\mysite\\personal\\urls.py", line 2, in <module> from . import views File "E:\\IT\\project\\program\\20-8-17\\mysite\\personal\\views.py", line 3, in <module> from personal.forms import * File "E:\\IT\\project\\program\\20-8-17\\mysite\\personal\\forms.py", line 50, in <module> class DoctorSignupForm(forms.ModelForm): File "E:\\IT\\project\\program\\20-8-17\\mysite\\personal\\forms.py", line 90, in DoctorSignupForm contact = forms.RegexField(regex=r'^[789]\\d{9}$',error_messages="Enter valid phone no.") File "C:\\Users\\Charmi Shah\\AppData\\Local\\Programs\\Python\\Python35-32\\lib\\site-packages\\django\\forms\\fields.py", line 517, in __init__ super(RegexField, self).__init__(max_length, min_length, *args, **kwargs) File "C:\\Users\\Charmi Shah\\AppData\\Local\\Programs\\Python\\Python35-32\\lib\\site-packages\\django\\forms\\fields.py", line 228, in __init__ super(CharField, self).__init__(*args, **kwargs) File "C:\\Users\\Charmi Shah\\AppData\\Local\\Programs\\Python\\Python35-32\\lib\\site-packages\\django\\forms\\fields.py", line 122, in __init__ messages.update(error_messages or {}) ValueError: dictionary update sequence element #0 has length 1; 2 is required 

Answer 1

error_messages should be a dict, not a string.

See the docs .