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              - from mch.models import AdministratorInfo, MaintenancemanInfo
 - def is_maintenanceman(brand_id, user_id):
 -     return MaintenancemanInfo.objects.filter(brand_id=brand_id, user_id=user_id, status=True).exists()
 - def is_admin(brand_id, admin_id):
 -     return AdministratorInfo.objects.filter(brand_id=brand_id, admin_id=admin_id, status=True).exists()
 
 
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