“DatabaseOperations”对象没有属性“geo\u db\u type”

Question

因此，我目前刚接触Django，正在开发一个GeoDjango应用程序，我需要用户能够将形状文件和点特征上传到数据库中。 我目前正在使用PostgreSQL作为我的数据库

运行： python manage.py makemigrations根本不是问题。当我尝试使用以下方法进行迁移时，会出现问题： python manage.py migrate

我得到'DatabaseOperations'对象没有属性'geo\u db\u type错误

我的models.py文件如下所示

class Beacon(models.Model):
    land_id = models.OneToOneField(Land, on_delete=models.CASCADE)
    lon = models.FloatField()
    lat = models.FloatField()
    mpoly = models.MultiPolygonField()
    beacons = models.MultiPointField()

我的settings.py文件中的数据库配置部分如下所示

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql',
        'NAME': 'LIMS',
        'USER': 'postgres',
        'PASSWORD': '<my_password_is_here>',
        'HOST': 'localhost'
    }
}

我已经在互联网上搜索过了，但所有的解决方案都不适合我，而且似乎大多数都在使用PostGIS作为数据库。 如果有人能在这个问题上提供帮助，我们将不胜感激

下面我还包括了错误的完整摘要

(LIMS) C:\Users\Surveyor Jr\Desktop\Projects\Django\LIMS\LIMS>python manage.py migrate
Operations to perform:
  Apply all migrations: admin, auth, contenttypes, farm_inventory, sessions, users
Running migrations:
  Applying farm_inventory.0023_auto_20201225_1304...Traceback (most recent call last):
  File "C:\Users\Surveyor Jr\Desktop\Projects\Django\LIMS\LIMS\manage.py", line 22, in <module>
    main()
  File "C:\Users\Surveyor Jr\Desktop\Projects\Django\LIMS\LIMS\manage.py", line 18, in main
    execute_from_command_line(sys.argv)
  File "C:\Users\Surveyor Jr\Envs\LIMS\lib\site-packages\django\core\management\__init__.py", line 401, in execute_from_command_line
    utility.execute()
  File "C:\Users\Surveyor Jr\Envs\LIMS\lib\site-packages\django\core\management\__init__.py", line 395, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "C:\Users\Surveyor Jr\Envs\LIMS\lib\site-packages\django\core\management\base.py", line 330, in run_from_argv
    self.execute(*args, **cmd_options)
  File "C:\Users\Surveyor Jr\Envs\LIMS\lib\site-packages\django\core\management\base.py", line 371, in execute
    output = self.handle(*args, **options)
  File "C:\Users\Surveyor Jr\Envs\LIMS\lib\site-packages\django\core\management\base.py", line 85, in wrapped
    res = handle_func(*args, **kwargs)
  File "C:\Users\Surveyor Jr\Envs\LIMS\lib\site-packages\django\core\management\commands\migrate.py", line 243, in handle
    post_migrate_state = executor.migrate(
  File "C:\Users\Surveyor Jr\Envs\LIMS\lib\site-packages\django\db\migrations\executor.py", line 117, in migrate
    state = self._migrate_all_forwards(state, plan, full_plan, fake=fake, fake_initial=fake_initial)
  File "C:\Users\Surveyor Jr\Envs\LIMS\lib\site-packages\django\db\migrations\executor.py", line 147, in _migrate_all_forwards
    state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)
  File "C:\Users\Surveyor Jr\Envs\LIMS\lib\site-packages\django\db\migrations\executor.py", line 227, in apply_migration
    state = migration.apply(state, schema_editor)
  File "C:\Users\Surveyor Jr\Envs\LIMS\lib\site-packages\django\db\migrations\migration.py", line 124, in apply
    operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
  File "C:\Users\Surveyor Jr\Envs\LIMS\lib\site-packages\django\db\migrations\operations\fields.py", line 104, in database_forwards
    schema_editor.add_field(
  File "C:\Users\Surveyor Jr\Envs\LIMS\lib\site-packages\django\db\backends\base\schema.py", line 455, in add_field
    definition, params = self.column_sql(model, field, include_default=True)
  File "C:\Users\Surveyor Jr\Envs\LIMS\lib\site-packages\django\db\backends\base\schema.py", line 212, in column_sql
    db_params = field.db_parameters(connection=self.connection)
  File "C:\Users\Surveyor Jr\Envs\LIMS\lib\site-packages\django\db\models\fields\__init__.py", line 717, in db_parameters
    type_string = self.db_type(connection)
  File "C:\Users\Surveyor Jr\Envs\LIMS\lib\site-packages\django\contrib\gis\db\models\fields.py", line 105, in db_type
    return connection.ops.geo_db_type(self)
AttributeError: 'DatabaseOperations' object has no attribute 'geo_db_type'

Answer 1

由于db引擎不是地理空间引擎，因此会出现错误，您可以找到受支持的here

当使用Postgres作为数据库时，您必须使用PostGIS扩展才能让Geodjango工作

按照官方文档中的steps启用Geodjango支持

Answer 2

您使用了错误的引擎后端，它应该是documented

     'ENGINE': 'django.contrib.gis.db.backends.postgis',

还要确保您完成了所有其余步骤，并安装了所需的扩展和工具