Django中多个应用程序的多个数据库-无法路由到特定应用程序的相关数据库

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': 'default_db',
        'USER': 'username',
        'PASSWORD': 'password',
        'HOST': 'localhost',
        'PORT': '3306',
    },
    'app1_db': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': 'app1_db',
        'USER': 'username',
        'PASSWORD': 'password',
        'HOST': 'localhost',
        'PORT': '3306',
    },
    'app2_db': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': 'app2_db',
        'USER': 'username',
        'PASSWORD': 'password',
        'HOST': 'localhost',
        'PORT': '3306',
    },
}

# app1/models.py
from django.db import models

class App1Model(models.Model):
    # 模型字段定义
    ...

    class Meta:
        app_label = 'app1'
        db_table = 'app1_model'
        using = 'app1_db'

# app2/models.py
from django.db import models

class App2Model(models.Model):
    # 模型字段定义
    ...

    class Meta:
        app_label = 'app2'
        db_table = 'app2_model'
        using = 'app2_db'

# app1/urls.py
from django.urls import path
from app1.views import App1View
from app1.router import database_router

app_name = 'app1'

urlpatterns = [
    path('app1/', App1View.as_view(), name='app1'),
]

database_router.register_app('app1', 'app1_db')

# app2/urls.py
from django.urls import path
from app2.views import App2View
from app2.router import database_router

app_name = 'app2'

urlpatterns = [
    path('app2/', App2View.as_view(), name='app2'),
]

database_router.register_app('app2', 'app2_db')