（fields.E331）フィールドは

Question

ERRORSインストールされていないモデルのmodels_groups 'を介して多対多の関係を指定：login.Freelancer.groups：（fields.E331）フィールドが多 を指定します「」がインストールされていないモデル 'login.Freelancer_groups'を介して多少の関係があります。 login.Freelancer.user_permissions： （fields.E331）フィールドは、インストールされていないモデル 'login.Freelancer_user_permissions'を介して多対多関係を指定します。 message_board.Post.author：（fields.E301）フィールドは、スワップアウトされたモデル 'auth.User'を というリレーションで定義します。 ヒント：リレーションを 'settings.AUTH_USER_MODEL'を指すように更新します。

models.py

from django.contrib.auth.tests.custom_user import CustomUserManager 
from django.db import models 
from django.utils import timezone 
from django.utils.http import urlquote 
from django.utils.translation import ugettext_lazy as _ 
from django.contrib.auth.models import AbstractBaseUser, BaseUserManager, PermissionsMixin 
from crm import settings 


class FreelancerManager(BaseUserManager): 
    def create_user(self, name, skills, password=None): 
     if not name: 
      raise ValueError('Users must have a 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 and saves a superuser with the given email, date of 
     birth and 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(verbose_name='name', 
          max_length=20, 
          unique=True,) 

    field_of_interest = models.CharField(max_length=200) 
    skills = models.TextField() 
    experience = models.TextField() 

    is_active = models.BooleanField(default=True) 
    is_admin = models.BooleanField(default=False) 

    objects = FreelancerManager() 

    USERNAME_FIELD = 'name' 
    REQUIRED_FIELDS = ['skills'] 

    class Meta: 
     db_table = 'auth_user' 
     verbose_name = _('user') 
     verbose_name_plural = _('users') 

    def get_absolute_url(self): 
     return "https://stackoverflow.com/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 the user have a specific permission?" 
     # # Simplest possible answer: Yes, always 
     return True 

    def has_module_perms(self, applabel): 
     # "Does the user have permissions to view the app `app_label`?" 
     # Simplest possible answer: Yes, always 
     return True 

    @property 
    def is_staff(self): 
     # "Is the user a member of staff?" 
     # "Simplest possible answer: All admins are staf" 
     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 Freelancer 


class UserCreationForm(forms.ModelForm): 
    """A form for creating new users. Includes all the required 
    fields, plus a repeated password.""" 
    password1 = forms.CharField(label='Password', widget=forms.PasswordInput) 
    password2 = forms.CharField(label='Password confirmation', widget=forms.PasswordInput) 

    class Meta: 
     model = Freelancer 
     fields = ('name', 'skills') 

    def clean_password2(self): 
     # Check that the two password entries match 
     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): 
     # Save the provided password in hashed format 
     user = super(UserCreationForm, self).save(commit=False) 
     user.set_password(self.cleaned_data["password1"]) 
     if commit: 
      user.save() 
     return user 


class UserChangeForm(forms.ModelForm): 
    """A form for updating users. Includes all the fields on 
    the user, but replaces the password field with admin's 
    password hash display field. 
    """ 
    password = ReadOnlyPasswordHashField() 

    class Meta: 
     model = Freelancer 
     fields = ('name', 'password', 'skills','is_admin') 

    def clean_password(self): 
     # Regardless of what the user provides, return the initial value. 
     # This is done here, rather than on the field, because the 
     # field does not have access to the initial value 
     return self.initial["password"] 


class FreelancerAdmin(BaseUserAdmin): 
    # The forms to add and change user instances 
    form = UserChangeForm 
    add_form = UserCreationForm 

    # The fields to be used in displaying the User model. 
    # These override the definitions on the base UserAdmin 
    # that reference specific fields on auth.User. 
    list_display = ('name', 'skills', 'is_admin') 
    list_filter = ('is_admin',) 
    fieldsets = (
     (None, {'fields': ('name', 'password')}), 
     ('Personal info', {'fields': ('skills',)}), 
     ('Permissions', {'fields': ('is_admin',)}), 
    ) 
    # add_fieldsets is not a standard ModelAdmin attribute. UserAdmin 
    # overrides get_fieldsets to use this attribute when creating a user. 
    add_fieldsets = (
     (None, { 
      'classes': ('wide',), 
      'fields': ('name', 'skills', 'password1', 'password2')} 
     ), 
    ) 
    search_fields = ('name',) 
    ordering = ('name',) 
    filter_horizontal =() 


# Now register the new UserAdmin... 
admin.site.register(Freelancer, FreelancerAdmin) 
admin.site.unregister(Group) 

settings.py

import os 

# Build paths inside the project like this: os.path.join(BASE_DIR, ...) 
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__))) 


# Quick-start development settings - unsuitable for production 
# See https://docs.djangoproject.com/en/1.9/howto/deployment/checklist/ 
# SECURITY WARNING: keep the secret key used in production secret! 
SECRET_KEY = '&_j_tz#06jbpo5shiy62x$qxa*t68_n@q4@$pee4(a()5vyt#9' 

# SECURITY WARNING: don't run with debug turned on in production! 
DEBUG = True 


ALLOWED_HOSTS = [] 

AUTH_USER_MODEL = 'auth.User' 
AUTH_USER_MODEL = 'login.Freelancer' 
# Application definition 

INSTALLED_APPS = [ 
    'django.contrib.admin', 
    'django.contrib.auth', 
    'django.contrib.contenttypes', 
    'django.contrib.sessions', 
    'django.contrib.messages', 
    'django.contrib.staticfiles', 
    'login', 
    'message_board' 
] 

MIDDLEWARE_CLASSES = [ 
    'django.middleware.security.SecurityMiddleware', 
    'django.contrib.sessions.middleware.SessionMiddleware', 
    'django.middleware.common.CommonMiddleware', 
    'django.middleware.csrf.CsrfViewMiddleware', 
    'django.contrib.auth.middleware.AuthenticationMiddleware', 
    'django.contrib.auth.middleware.SessionAuthenticationMiddleware', 
    'django.contrib.messages.middleware.MessageMiddleware', 
    'django.middleware.clickjacking.XFrameOptionsMiddleware', 
] 

ROOT_URLCONF = 'crm.urls' 

TEMPLATES = [ 
    { 
     'BACKEND': 'django.template.backends.django.DjangoTemplates', 
     'DIRS': [], 
     'APP_DIRS': True, 
     'OPTIONS': { 
      'context_processors': [ 
       'django.template.context_processors.debug', 
       'django.template.context_processors.request', 
       'django.contrib.auth.context_processors.auth', 
       'django.contrib.messages.context_processors.messages', 
      ], 
     }, 
    }, 
] 

WSGI_APPLICATION = 'crm.wsgi.application' 


# Database 
# https://docs.djangoproject.com/en/1.9/ref/settings/#databases 

DATABASES = { 
    'default': { 
     'ENGINE': 'django.db.backends.sqlite3', 
     'NAME': os.path.join(BASE_DIR, 'db.sqlite3'), 
    } 
} 

# Password validation 
# https://docs.djangoproject.com/en/1.9/ref/settings/#auth-password-validators 

AUTH_PASSWORD_VALIDATORS = [ 
    { 
     'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator', 
    }, 
    { 
     'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator', 
    }, 
    { 
     'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator', 
    }, 
    { 
     'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator', 
    }, 
] 


# Internationalization 
# https://docs.djangoproject.com/en/1.9/topics/i18n/ 

LANGUAGE_CODE = 'en-us' 

TIME_ZONE = 'Asia/Kolkata' 

USE_I18N = True 

USE_L10N = True 

USE_TZ = True 


# Static files (CSS, JavaScript, Images) 
# https://docs.djangoproject.com/en/1.9/howto/static-files/ 

STATIC_URL = '/static/' 
STATIC_ROOT = os.path.join(BASE_DIR, 'static') 

と私はmodels.pyがここ

message_boardアプリケーションのmodels.py

class Post(models.Model): 
    author = models.ForeignKey('auth.User') 
    title = models.CharField(max_length=200) 
    text = models.TextField() 
    created_date = models.DateTimeField(
      default=timezone.now) 
    published_date = models.DateTimeField(
      blank=True, null=True) 

    def publish(self): 
     self.published_date = timezone.now() 
     self.save() 

    def __str__(self): 
     return self.title 

Answer 1

があるというエラーからそのが既に明らかである1以上という名前のアプリmessage_boardを持っていますauth.Userといい、authorと指しています。それを変更してください。

どちらかFreelanceまたはsettings.AUTH_USER_MODEL

from login.models import Freelancer 

class Post(models.Model): 
    author = models.ForeignKey('settings.AUTH_USER_MODEL', on_delete=models.CASCADE)