修复没创建时间和更改时间时空指针问题

zhangqian

2024-01-03 e5e5b080f500871d8baa5af78915d9a9d32a1d8b

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package test
 
type ServiceGroup struct {
    SupplierTypeService
    IndustryService
    SupplierService
    ContractService
    ProductService
    MemberService
}