python – 期望的字符串或缓冲区,date_re.match(value)django错误
作者：互联网
我想在django官方网站上复制django.I复制粘贴代码中的自定义用户模型.当我想要迁移它时,它会抛出错误
TypeError: expected string or buffer
models.py
education=models.CharField(max_length=13)
from django.db import models
from django.contrib.auth.models import (
BaseUserManager, AbstractBaseUser
)
class MyUserManager(BaseUserManager):
def create_user(self, email, date_of_birth, password=None):
if not email:
raise ValueError('Users must have an email address')
user = self.model(
email=self.normalize_email(email),
date_of_birth=date_of_birth,
)
user.set_password(password)
user.save(using=self._db)
return user
def create_superuser(self, email, date_of_birth, password):
user = self.create_user(email,
password=password,
date_of_birth=date_of_birth
)
user.is_admin = True
user.save(using=self._db)
return user
class MyUser(AbstractBaseUser):
email = models.EmailField(
verbose_name='email address',
max_length=255,
unique=True,
)
date_of_birth = models.CharField(max_length=20)
is_active = models.BooleanField(default=True)
is_admin = models.BooleanField(default=False)
objects = MyUserManager()
USERNAME_FIELD = 'email'
REQUIRED_FIELDS = ['date_of_birth']
def get_full_name(self):
return self.email
def get_short_name(self):
return self.email
def __unicode__(self): # __unicode__ on Python 2
return self.email
def has_perm(self, perm, obj=None):
"Does the user have a specific permission?"
return True
def has_module_perms(self, app_label):
"Does the user have permissions to view the app `app_label`?"
return True
@property
def is_staff(self):
"Is the user a member of staff?"
return self.is_admin
admin.py
from django import forms
from django.contrib import admin
from django.contrib.auth.models import Group
from django.contrib.auth.admin import UserAdmin as BaseUserAdmin
from django.contrib.auth.forms import ReadOnlyPasswordHashField
from .models import MyUser
class UserCreationForm(forms.ModelForm):
password1 = forms.CharField(label='Password', widget=forms.PasswordInput)
password2 = forms.CharField(label='Password confirmation', widget=forms.PasswordInput)
class Meta:
model = MyUser
fields = ('email', 'date_of_birth')
def clean_password2(self):
password1 = self.cleaned_data.get("password1")
password2 = self.cleaned_data.get("password2")
if password1 and password2 and password1 != password2:
raise forms.ValidationError("Passwords don't match")
return password2
def save(self, commit=True):
user = super(UserCreationForm, self).save(commit=False)
user.set_password(self.cleaned_data["password1"])
if commit:
user.save()
return user
class UserChangeForm(forms.ModelForm):
password = ReadOnlyPasswordHashField()
class Meta:
model = MyUser
fields = ('email', 'password', 'date_of_birth', 'is_active', 'is_admin')
def clean_password(self):
return self.initial["password"]
class UserAdmin(BaseUserAdmin):
form = UserChangeForm
add_form = UserCreationForm
.
list_display = ('email', 'date_of_birth', 'is_admin')
list_filter = ('is_admin',)
fieldsets = (
(None, {'fields': ('email', 'password')}),
('Personal info', {'fields': ('date_of_birth',)}),
('Permissions', {'fields': ('is_admin',)}),
)
add_fieldsets = (
(None, {
'classes': ('wide',),
'fields': ('email', 'date_of_birth', 'password1', 'password2')}
),
)
search_fields = ('email',)
ordering = ('email',)
filter_horizontal = ()
admin.site.register(MyUser, UserAdmin)
admin.site.unregister(Group)
错误回溯
Rendering model states... DONE
Applying app.0002_auto_20160420_0647...Traceback (most recent call last):
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 338, in execute_from_command_line
utility.execute()
File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 330, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 390, in run_from_argv
self.execute(*args, **cmd_options)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 441, in execute
output = self.handle(*args, **options)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/commands/migrate.py", line 221, in handle
executor.migrate(targets, plan, fake=fake, fake_initial=fake_initial)
File "/usr/local/lib/python2.7/dist-packages/django/db/migrations/executor.py", line 110, in migrate
self.apply_migration(states[migration], migration, fake=fake, fake_initial=fake_initial)
File "/usr/local/lib/python2.7/dist-packages/django/db/migrations/executor.py", line 147, in apply_migration
state = migration.apply(state, schema_editor)
File "/usr/local/lib/python2.7/dist-packages/django/db/migrations/migration.py", line 115, in apply
operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
File "/usr/local/lib/python2.7/dist-packages/django/db/migrations/operations/fields.py", line 62, in database_forwards
field,
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/sqlite3/schema.py", line 176, in add_field
self._remake_table(model, create_fields=[field])
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/sqlite3/schema.py", line 74, in _remake_table
self.effective_default(field)
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/base/schema.py", line 207, in effective_default
default = field.get_db_prep_save(default, self.connection)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/fields/__init__.py", line 710, in get_db_prep_save
prepared=False)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/fields/__init__.py", line 1322, in get_db_prep_value
value = self.get_prep_value(value)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/fields/__init__.py", line 1317, in get_prep_value
return self.to_python(value)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/fields/__init__.py", line 1274, in to_python
parsed = parse_date(value)
File "/usr/local/lib/python2.7/dist-packages/django/utils/dateparse.py", line 60, in parse_date
match = date_re.match(value)
TypeError: expected string or buffer
0002_auto_20160420_0647.py的内容
# -*- coding: utf-8 -*-
from __future__ import unicode_literals
from django.db import models, migrations
class Migration(migrations.Migration):
dependencies = [
('app', '0001_initial'),
]
operations = [
migrations.AlterModelOptions(
name='myuser',
options={},
),
migrations.AlterModelManagers(
name='myuser',
managers=[
],
),
migrations.RemoveField(
model_name='myuser',
name='contact',
),
migrations.RemoveField(
model_name='myuser',
name='date_joined',
),
migrations.RemoveField(
model_name='myuser',
name='education',
),
migrations.RemoveField(
model_name='myuser',
name='first_name',
),
migrations.RemoveField(
model_name='myuser',
name='groups',
),
migrations.RemoveField(
model_name='myuser',
name='is_staff',
),
migrations.RemoveField(
model_name='myuser',
name='is_superuser',
),
migrations.RemoveField(
model_name='myuser',
name='last_name',
),
migrations.RemoveField(
model_name='myuser',
name='name',
),
migrations.RemoveField(
model_name='myuser',
name='user_permissions',
),
migrations.RemoveField(
model_name='myuser',
name='username',
),
migrations.AddField(
model_name='myuser',
name='date_of_birth',
field=models.DateField(default=1),
preserve_default=False,
),
migrations.AddField(
model_name='myuser',
name='is_admin',
field=models.BooleanField(default=False),
),
migrations.AlterField(
model_name='myuser',
name='email',
field=models.EmailField(unique=True, max_length=255, verbose_name=b'email address'),
),
migrations.AlterField(
model_name='myuser',
name='is_active',
field=models.BooleanField(default=True),
),
]
解决方法:
您的问题是迁移文件中的这一行：
field=models.DateField(default=1),
将其更改为
field=models.DateField(null=True),
要么
field=models.CharField(max_length=20),
标签：python,django,django-migrations 来源： https://codeday.me/bug/20190706/1395756.html