django.core.exceptions.FieldError: Unknown field(s) (is_admin) specified for freelancer -

models.py

class myusermanager(baseusermanager):     def create_user(self, name, skills, password=none):          if not name:             raise valueerror('users must have unique name ')          user = self.model(             name=self.name,             skills=skills,         )         user.set_password(password)         user.save(using=self._db)         return user      def create_superuser(self, name, skills, password):         """         creates , saves superuser given email, date of         birth , password.         """         user = self.create_user(             name,             password=password,             skills=skills,         )         user.is_admin = true         user.save(using=self._db)         return user   class freelancer(abstractbaseuser, permissionsmixin):     name = models.charfield(max_length=20, unique='true')     password = models.charfield(max_length=20)     field_of_interest = models.charfield(max_length=200)     skills = models.textfield()     experience = models.textfield()      username_field = 'name'     required_fields = ['skills']      class meta:         verbose_name = _('user')         verbose_name_plural = _('users')      def get_absolute_url(self):         return "/users/%s/" % urlquote(self.name)      def get_short_name(self):         return self.name      def get_full_name(self):         return self.name      def __str__(self):  # __unicode__ on python 2         return self.name     #     # def has_perm(self, perm, obj=none):     #     # "does user have specific permission?"     #     # # simplest possible answer: yes,     #     return true      def has_module_perms(self, applabel):         # "does user have permissions view app `app_label`?"         # simplest possible answer: yes,         return true      # @property     # def is_staff(self):     #     # "is user member of staff?"     #     # "simplest possible answer: admins staf"     #     return self.is_admin 

and exact error i'm getting

  file "/usr/lib/python2.7/dist-packages/django/forms/models.py", line 294, in __new__     raise fielderror(message) django.core.exceptions.fielderror: unknown field(s) (is_admin) specified freelancer 

i got solution need add these 2 lines in class freelancer here line-- is_active = models.booleanfield(default=true) is_admin = models.booleanfield(default=false)