我該如何解決這個問題？ 我正在嘗試運行我的 django 應用程序並收到此錯誤

Question

myapp.AuthPermission.content_type: (fields.E300) 字段定義了與 model 'DjangoContentType' 的關系，它要么未安裝，要么是抽象的。

myapp.AuthPermission.content_type: (fields.E307) 字段 myapp.AuthPermission.content_type 是用對“myapp.djangocontenttype”的惰性引用聲明的，但應用程序“myapp”不提供 model“djangocontenttype”。

我的 model.py

從 django.db 導入模型

class AuthGroup(models.Model):
    name = models.CharField(unique=True, max_length=150)

    class Meta:
        managed = False
        db_table = 'auth_group'


class AuthGroupPermissions(models.Model):
    group = models.ForeignKey(AuthGroup, models.DO_NOTHING)
    permission = models.ForeignKey('AuthPermission', models.DO_NOTHING)

    class Meta:
        managed = False
        db_table = 'auth_group_permissions'
        unique_together = (('group', 'permission'),)


class AuthPermission(models.Model):
    name = models.CharField(max_length=255)
    content_type = models.ForeignKey('DjangoContentType', models.DO_NOTHING)
    codename = models.CharField(max_length=100)

    class Meta:
        managed = False
        db_table = 'auth_permission'
        unique_together = (('content_type', 'codename'),)


class BackgroundTask(models.Model):
    task_name = models.CharField(max_length=190)
    task_params = models.TextField()
    task_hash = models.CharField(max_length=40)
    verbose_name = models.CharField(max_length=255, blank=True, null=True)
    priority = models.IntegerField()
    run_at = models.DateTimeField()
    repeat = models.BigIntegerField()
    repeat_until = models.DateTimeField(blank=True, null=True)
    queue = models.CharField(max_length=190, blank=True, null=True)
    attempts = models.IntegerField()
    failed_at = models.DateTimeField(blank=True, null=True)
    last_error = models.TextField()
    locked_by = models.CharField(max_length=64, blank=True, null=True)
    locked_at = models.DateTimeField(blank=True, null=True)
    creator_object_id = models.IntegerField(blank=True, null=True)
    creator_content_type = models.ForeignKey('DjangoContentType', models.DO_NOTHING, blank=True, null=True)

    class Meta:
        managed = False
        db_table = 'background_task'


class BackgroundTaskCompletedtask(models.Model):
    task_name = models.CharField(max_length=190)
    task_params = models.TextField()
    task_hash = models.CharField(max_length=40)
    verbose_name = models.CharField(max_length=255, blank=True, null=True)
    priority = models.IntegerField()
    run_at = models.DateTimeField()
    repeat = models.BigIntegerField()
    repeat_until = models.DateTimeField(blank=True, null=True)
    queue = models.CharField(max_length=190, blank=True, null=True)
    attempts = models.IntegerField()
    failed_at = models.DateTimeField(blank=True, null=True)
    last_error = models.TextField()
    locked_by = models.CharField(max_length=64, blank=True, null=True)
    locked_at = models.DateTimeField(blank=True, null=True)
    creator_object_id = models.IntegerField(blank=True, null=True)
    creator_content_type = models.ForeignKey('DjangoContentType', models.DO_NOTHING, blank=True, null=True)

    class Meta:
        managed = False
        db_table = 'background_task_completedtask'


class DjangoAdminLog(models.Model):
    action_time = models.DateTimeField()
    object_id = models.TextField(blank=True, null=True)
    object_repr = models.CharField(max_length=200)
    action_flag = models.SmallIntegerField()
    change_message = models.TextField()
    content_type = models.ForeignKey('DjangoContentType', models.DO_NOTHING, blank=True, null=True)
    user = models.ForeignKey('MyappUser', models.DO_NOTHING)

    class Meta:
        managed = False
        db_table = 'django_admin_log'


class DjangoCeleryBeatClockedschedule(models.Model):
    clocked_time = models.DateTimeField()

    class Meta:
        managed = False
        db_table = 'django_celery_beat_clockedschedule'


class DjangoCeleryBeatCrontabschedule(models.Model):
    minute = models.CharField(max_length=240)
    hour = models.CharField(max_length=96)
    day_of_week = models.CharField(max_length=64)
    day_of_month = models.CharField(max_length=124)
    month_of_year = models.CharField(max_length=64)
    timezone = models.CharField(max_length=63)

    class Meta:
        managed = False
        db_table = 'django_celery_beat_crontabschedule'


class DjangoCeleryBeatIntervalschedule(models.Model):
    every = models.IntegerField()
    period = models.CharField(max_length=24)

    class Meta:
        managed = False
        db_table = 'django_celery_beat_intervalschedule'


class DjangoCeleryBeatPeriodictask(models.Model):
    name = models.CharField(unique=True, max_length=200)
    task = models.CharField(max_length=200)
    args = models.TextField()
    kwargs = models.TextField()
    queue = models.CharField(max_length=200, blank=True, null=True)
    exchange = models.CharField(max_length=200, blank=True, null=True)
    routing_key = models.CharField(max_length=200, blank=True, null=True)
    expires = models.DateTimeField(blank=True, null=True)
    enabled = models.BooleanField()
    last_run_at = models.DateTimeField(blank=True, null=True)
    total_run_count = models.IntegerField()
    date_changed = models.DateTimeField()
    description = models.TextField()
    crontab = models.ForeignKey(DjangoCeleryBeatCrontabschedule, models.DO_NOTHING, blank=True, null=True)
    interval = models.ForeignKey(DjangoCeleryBeatIntervalschedule, models.DO_NOTHING, blank=True, null=True)
    solar = models.ForeignKey('DjangoCeleryBeatSolarschedule', models.DO_NOTHING, blank=True, null=True)
    one_off = models.BooleanField()
    start_time = models.DateTimeField(blank=True, null=True)
    priority = models.IntegerField(blank=True, null=True)
    headers = models.TextField()
    clocked = models.ForeignKey(DjangoCeleryBeatClockedschedule, models.DO_NOTHING, blank=True, null=True)
    expire_seconds = models.IntegerField(blank=True, null=True)

    class Meta:
        managed = False
        db_table = 'django_celery_beat_periodictask'


class DjangoCeleryBeatPeriodictasks(models.Model):
    ident = models.SmallIntegerField(primary_key=True)
    last_update = models.DateTimeField()

    class Meta:
        managed = False
        db_table = 'django_celery_beat_periodictasks'


class DjangoCeleryBeatSolarschedule(models.Model):
    event = models.CharField(max_length=24)
    latitude = models.DecimalField(max_digits=9, decimal_places=6)
    longitude = models.DecimalField(max_digits=9, decimal_places=6)

    class Meta:
        managed = False
        db_table = 'django_celery_beat_solarschedule'
        unique_together = (('event', 'latitude', 'longitude'),)


class DjangoContentType(models.Model):
    app_label = models.CharField(max_length=100)
    model = models.CharField(max_length=100)

    class Meta:
        managed = False
        db_table = 'django_content_type'
        unique_together = (('app_label', 'model'),)


class DjangoMigrations(models.Model):
    app = models.CharField(max_length=255)
    name = models.CharField(max_length=255)
    applied = models.DateTimeField()

    class Meta:
        managed = False
        db_table = 'django_migrations'


class DjangoSession(models.Model):
    session_key = models.CharField(primary_key=True, max_length=40)
    session_data = models.TextField()
    expire_date = models.DateTimeField()

    class Meta:
        managed = False
        db_table = 'django_session'



class MyappUserGroups(models.Model):
    user = models.ForeignKey(MyappUser, models.DO_NOTHING)
    group = models.ForeignKey(AuthGroup, models.DO_NOTHING)

    class Meta:
        managed = False
        db_table = 'Myapp_user_groups'
        unique_together = (('user', 'group'),)


class MyappUserUserPermissions(models.Model):
    user = models.ForeignKey(MyappUser, models.DO_NOTHING)
    permission = models.ForeignKey(AuthPermission, models.DO_NOTHING)

    class Meta:
        managed = False
        db_table = 'Myapp_user_user_permissions'
        unique_together = (('user', 'permission'),)

Answer 1

models.py看起來像是通過inspectdb命令從遺留數據庫生成的。 重新生成模型文件或將以下內容添加到您的models.py文件中 -

class DjangoContentType(models.Model):
    app_label = models.CharField(max_length=100)
    model = models.CharField(max_length=100)

    class Meta:
        managed = False
        db_table = 'django_content_type'
        unique_together = (('app_label', 'model'),)