Как создать и работать с двумя базами в django?

class ProjectDbRouter(object):
    """A router to control all database operations on models in the myapp application"""
 
    def db_for_read(self, model, **hints):
        """Suggest the database that should be used for read operations for objects of type model."""
        if model._meta.app_label == "home":
            return "overhead_data"
        return None
 
    def db_for_write(self, model, **hints):
        """Suggest the database that should be used for writes of objects of type Model."""
        if model._meta.app_label == "home":
            return "overhead_data"
        return None
 
    def allow_relation(self, obj1, obj2, **hints):
        """Deny any relation if a model in specialapp is involved"""
        if obj1._meta.app_label == "home" or \
                obj2._meta.app_label == "home":
            return False
        return None
 
    def allow_syncdb(self, db, model):
        """Deny sync db for the specialapp models"""
        if model._meta.app_label == "home":
            return False
        if db == "overhead_data":
            return False
        return None

from django.db.models import *
 
# Create your models here.
 
class Services(Model):
    name_en = CharField(max_length = 50, unique=True)
    name_ru = CharField(max_length = 50)
    priority = IntegerField()
 
    class Meta:
        db_table = 'services'
        # managed = False
 
class Comfort(Model):
    name_en = CharField(max_length = 50, unique = True)
    name_ru = CharField(max_length = 50)
    type_point = TextField()
 
    class Meta:
        db_table = 'confort'
        # managed = False
 
class Countries(Model):
    name_en = CharField(max_length = 50, unique = True)
    name_ru = CharField(max_length = 50)
    border = TextField() #svg текст с контуром страны
    flag = TextField() #svg текст с изображением флага
    active = BooleanField() #участвует в поиске (да/нет)
 
    class Meta:
        db_table = 'countries'
        # managed = False
 
class Regions(Model):
    country = IntegerField() #id страны
    name_en = CharField(max_length = 50)
    name_ru = CharField(max_length = 50)
 
    class Meta:
        db_table = 'regions'
        # managed = False
 
class Cities(Model):
    country = IntegerField()
    region = IntegerField()
    name_en = CharField(max_length = 50)
    name_ru = CharField(max_length = 50)
    important = BooleanField() #главный в регионе
 
    class Meta:
        db_table = 'cities'
        # managed = False