Django Fremdschlüssel (ManyToMany) Feld ist nicht auf DB-Tabelle hinzugefügt

Question

class Organization(models.Model): 
    mLeader = models.ForeignKey(User) 
    mName = models.CharField(max_length=30, default='-') 
    mTel = models.CharField(max_length=15, default='-') 
    mAddress = models.TextField(default='-') 
    mType = models.CharField(max_length=1, default='A') # A : Daycare Center, B : private educational institute, C : Church, D : ... 
    owner = models.ForeignKey('auth.User', related_name='Organization') 

    def __str__(self) : 
     return self.mName 

class OrganizationLeader(models.Model): 
    #private info 
    mUser = models.ForeignKey(User) 
    owner = models.ForeignKey('auth.User', related_name='Leader') 
    # mName = models.CharField(max_length=30, default='-') 

class BusLine(models.Model): 
    mOrganization = models.ForeignKey(Organization) 
    mName = models.CharField(max_length=30, default='-') 
    mIsPrivate = models.BooleanField(default=True) 
    mCreated = models.DateTimeField(auto_now_add=True) 
    mIsCycle = models.BooleanField(default=False) 

    owner = models.ForeignKey('auth.User', related_name='lines') 

    class Meta: 
     ordering = ('mCreated',) 

class BusStation(models.Model): 
    mName = models.CharField(max_length=30, default='-') 
    mCreated = models.DateTimeField(auto_now_add=True) 
    mOrder = models.IntegerField(default=None) 
    mIsStart = models.BooleanField(default=False) 
    mIsEnd = models.BooleanField(default=False) 
    mBusLine = models.ManyToManyField('BusLine', blank=True, null=True) 

    #변수명이 고정돼있어 접미사 붙이지 않음 
    mpoint = models.PointField(default=None) 
    objects = models.GeoManager() 
    Latitude = models.DecimalField(default=0.0, max_digits=10, decimal_places=6) 
    Longitude = models.DecimalField(default=0.0, max_digits=10, decimal_places=6) 

    owner = models.ForeignKey('auth.User', related_name='stations') 

    class Meta: 
     ordering = ['mOrder'] 

class Bus(models.Model): 
    mDriver = models.ForeignKey(User) 
    mDriving = models.BooleanField(default=False) 
    mCurrentStation = models.IntegerField(default=0) 
    mCreated = models.DateTimeField(auto_now_add=True) 
    mName = models.CharField(max_length=100) 
    mBusLine = models.ForeignKey('BusLine', on_delete=models.CASCADE, blank=True, null=True) 
    mArrive = models.BooleanField(default=False) 

    #LSB Data 
    #변수명이 고정돼있어 접미사 붙이지 않음 
    mpoint = models.PointField(default=None) 
    objects = models.GeoManager() 
    Latitude = models.DecimalField(default=0.0, max_digits=10, decimal_places=6) 
    Longitude = models.DecimalField(default=0.0, max_digits=10, decimal_places=6) 

    owner = models.ForeignKey('auth.User', related_name='buses') 

    def save(self, *args, **kwargs): 
     self.Latitude = self.mpoint.y 
     self.Longitude = self.mpoint.x 
     super(Bus, self).save(*args, **kwargs) 

    class Meta: 
     ordering = ('mCreated',) 

class PassengerLogManager(models.Manager): 
    def create_log(self, id): 
     log = self.create(mBusId = id) 
     return log 

class PassengerLog(models.Model): 
    mBusId = models.IntegerField() 
    mCreated = models.DateTimeField(auto_now_add=True,) 
    #JSON 필드에 버스의 한 회차 정류장당 탑승자 리스트가 저장됨 
    mLog = JSONField() 
    objects = PassengerLogManager() 

class AppUser(models.Model): 
    #private info 
    mUser = models.ForeignKey(User) 
    mBaseDestination = models.ForeignKey(
     BusStation, 
     verbose_name = 'BaseDestination', 
     default = '-', 
    ) 
    mName = models.CharField(
     verbose_name = 'UserName', 
     max_length=30, 
     blank = False, 
     default = '-' 
    ) 

    mChild = models.ManyToManyField(
     'self', 
     through = 'ParentToChildEntry', 
     verbose_name = 'Child', 
     through_fields = ('mParent','mChild'), 
     symmetrical = False, 
    ) 
    owner = models.ForeignKey('auth.User', related_name='User') 
    def __str__(self) : 
     return self.mName 

class ParentToChildEntry(models.Model) : 
    mName = models.CharField(
     max_length = 20, 
     verbose_name = 'Title', 
     blank = False, 
     default = '-' 
    ) 
    mParent = models.ForeignKey(
     AppUser, 
     verbose_name = 'Parent', 
     related_name = 'Parent', 
    ) 

    mChild = models.ManyToManyField(
     AppUser, 
     verbose_name = 'Child', 
     related_name = 'Child', 
    ) 
    def __str__(self) : 
     return self.mName 

class OrganizationToUserEntry(models.Model) : 
    mName = models.CharField(
     max_length = 20, 
     verbose_name = 'Title', 
     blank = False, 
     default ='-' 
    ) 
    mOrganizations = models.ForeignKey(
     Organization, 
     verbose_name = 'Organization' 
    ) 
    mUsers = models.ManyToManyField(
     AppUser, 
     verbose_name = 'Users' 
    ) 
    def __str__(self) : 
     return self.mName 

Der obige Code ist ein Bus Verwaltung Systemmodell. (Django Version 1.11.4) Erstens, wenn ich versuchte, diese zu starten und zu testen, in admin,

der Fehler (1054, "Unknown column 'DataMng_appuser.mBaseDestination_id' in 'Feldliste'")

erregt so gespült I DB und migrierten Modell.
jedoch Wenn ich dieses Modell zu migrieren versucht, zurück System mir

[WARNUNG: DataMng.BusStation.mBusLine:. (Fields.W340) null hat keine Auswirkung auf ManyToManyField]

I wiederholt gefunden, wie man dieses Problem löst, aber ich konnte nicht finden. Bitte sagen Sie mir, was ich T_T tun soll. Danke fürs Lesen.

Answer 1

und Sie können einfach Option entfernen null=True in Ihrem mBusLine

class BusStation(models.Model): 
    # other fields 
    mBusLine = models.ManyToManyField('BusLine', blank=True, null=True) 
    #              ^^^^^^^^^^