[英]EF Core / AutoMapper - How to map related data when there is no corresponding collection in the scaffolded classes?
[英]EF Core related data is null with AutoMapper
在我的應用中,一個案例可以有很多公司。
我的模型:
public class Case
{
[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public Guid Id { get; set; }
public string Name { get; set; }
public IList<CaseCompany> CaseCompanies { get; set; }
}
public class CaseInput
{
public Guid Id { get; set; }
[Required]
public string Name { get; set; }
public IList<CaseCompanyInput> CaseCompanyInputs { get; set; }
}
public class Company
{
[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public Guid Id { get; set; }
public string Name { get; set; }
}
public class CompanyInput
{
public Guid Id { get; set; }
[Required]
public string Name { get; set; }
}
public class CaseCompany
{
[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public Guid Id { get; set; }
public Guid CaseId { get; set; }
public Guid CompanyId { get; set; }
public class Case Case { get; set; }
public class Company Company { get; set; }
}
public class CaseCompanyInput
{
public Guid Id { get; set; }
public Guid CaseId { get; set; }
public Guid CompanyId { get; set; }
public class CaseInput CaseInput { get; set; }
public class CompanyInput CompanyInput { get; set; }
}
AutoMapperProfiles.cs:
// In Startup.cs: services.AddAutoMapper(typeof(AutoMapperProfiles));
public class AutoMapperProfiles : Profile
{
public AutoMapperProfiles()
{
CreateMap<Case, CaseInput>().ReverseMap();
CreateMap<CaseCompany, CaseCompanyInput>().ReverseMap();
CreateMap<Company, CompanyInput>().ReverseMap();
}
}
編輯案例.cs:
private readonly DBContext _dbContext;
private readonly IMapper _mapper;
[BindProperty]
public CaseInput CaseInput { get; set; }
public EditCase(DBContext dbContext, IMapper mapper)
{
_dbContext = dbContext;
_mapper = mapper;
}
public async Task<IActionResult> OnGetAsync(Guid caseId)
{
var getCase = await _dbContext.Cases.Include(x => x.CaseCompanies).ThenInclude(x => x.Company).FirstOrDefaultAsync(x => x.Id == caseId);
CaseInput = _mapper.Map<CaseInput>(getCase);
Console.WriteLine(getCase.CaseCompanies[0].Company.Name) // gets the company name
Console.WriteLine(CaseInput.CaseCompanyInputs[0].CompanyInput.Name) // CaseInput.Name is not null but CaseCompanyInputs is null
return Page();
}
我也試過:
CaseInput = await _dbContext.Cases.ProjectTo<CaseInput>(_mapper.ConfigurationProvider).FirstOrDefaultAsync(x => x.Id == caseId);
和
CaseInput = await _dbContext.Cases.Include(x => x.CaseCompanies).ThenInclude(x => x.Company).ProjectTo<CaseInput>(_mapper.ConfigurationProvider).FirstOrDefaultAsync(x => x.Id == caseId);
結果相同: CaseCompanyInputs
為 null。
我最好的猜測是輸入模型的關系有錯誤,但我就是看不到。 我相信我已經遵循命名約定來使關系正確。
任何幫助,將不勝感激。
要使自動映射起作用,您必須將您的目標屬性名稱重命名為與源屬性名稱相同
public class CaseInput
{
public Guid Id { get; set; }
public string Name { get; set; }
//public IList<CaseCompanyInput> CaseCompanyInputs { get; set; }
public IList<CaseCompanyInput> CaseCompanies { get; set; }
}
public class CaseCompanyInput
{
public Guid Id { get; set; }
public Guid CaseId { get; set; }
public Guid CompanyId { get; set; }
//public CaseInput CaseInput { get; set; }
public CaseInput Case { get; set; }
//public CompanyInput CompanyInput { get; set; }
public CompanyInput Company { get; set; }
}
如果您不想更改屬性名稱,請將您的配置更改為以下內容。
CreateMap<Case, CaseInput>()
.ForMember(dest => dest.CaseCompanyInputs, opt => opt.MapFrom(src => src.CaseCompanies));
CreateMap<CaseCompany, CaseCompanyInput>()
.ForMember(dest => dest.CaseInput, opt => opt.MapFrom(src => src.Case))
.ForMember(dest => dest.CompanyInput, opt => opt.MapFrom(src => src.Company));
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