Automapper没有忽视嵌套属性 [英] Automapper not ignoring nested property
问题描述
我已经通过各种类似的职位的外观,但不能当场我与此一方式错误。基本上我有一个设置对象的两个视图其中更新不同的部分。视图模型包含两个属性中的一个,并根据在其上被设置,应忽略其他。它正常工作时,它的视图模型==>实体直接但当Automapper尝试更新嵌套对象失败
I've had a look through the various similar posts but can't spot the error of my ways with this one. Basically I have two views which update different parts of a "Settings" object. The view models contain one of two properties and depending on which is being set, should ignore the other. It works fine when it's ViewModel ==> Entity direct but when Automapper tries to update the nested object it fails.
我有以下对象结构:
public class Account
{
public int AccountId { get; set; }
public DateTime DateToBeIgnored { get; set; }
public AccountSetting Settings { get; set; }
}
public class AccountSetting
{
public string PropertyOne { get; set; }
public string PropertyTwo { get; set; }
}
public class AccountViewModel
{
public int AccountId { get; set; }
public DateTime DateToBeIgnored { get; set; }
public AccountSettingViewModel Settings { get; set; }
}
public class AccountSettingViewModel
{
public string PropertyTwo { get; set; }
}
public class OtherAccountSettingViewModel
{
public string PropertyOne { get; set; }
}
通过映射:
void WireUpMappings()
{
// From the entities to the view models
Mapper.CreateMap<Account, AccountViewModel>();
Mapper.CreateMap<AccountSetting, AccountSettingViewModel>();
Mapper.CreateMap<AccountSetting, OtherAccountSettingViewModel>();
// From the view models to the entities
Mapper.CreateMap<AccountViewModel, Account>()
.ForMember(dest => dest.DateToBeIgnored, opt => opt.Ignore());
Mapper.CreateMap<AccountSettingViewModel, AccountSetting>()
.ForMember(dest => dest.PropertyTwo, opt => opt.Ignore());
Mapper.CreateMap<OtherAccountSettingViewModel, AccountSetting>()
.ForMember(dest => dest.PropertyOne, opt => opt.Ignore());
Mapper.AssertConfigurationIsValid();
}
在映射[OtherAccountSettingViewModel - > AccountSetting],只有财产PropertyTwo 。分配(和PropertyOne的原始值保持不变) - 这是我所期望的。
When mapping [OtherAccountSettingViewModel --> AccountSetting], only the property "PropertyTwo" is assigned (and the original value for "PropertyOne" remains unchanged) -this is what I would expect.
不过映射[AccountViewModel - >帐户]当DateToBeIgnored是被有意忽略,而Account.AccountSetting.PropertyTwo的前值被替换为空。
However when mapping [AccountViewModel --> Account] "DateToBeIgnored" is ignored as intended whereas Account.AccountSetting.PropertyTwo's previous value is replaced with "null".
任何人都可以发现我的方式错误?
Can anyone spot the error of my ways?
推荐答案
下面是解决方案:
[TestMethod]
public void TestMethod1()
{
Mapper.CreateMap<AccountViewModel, Account>()
.ForMember(dest => dest.DateToBeIgnored, opt => opt.Ignore())
.ForMember(dest=>dest.Settings, opt=>opt.UseDestinationValue());
Mapper.CreateMap<AccountSettingViewModel, AccountSetting>()
.ForMember(dest=>dest.PropertyOne, opt=>opt.Ignore())
.ForMember(dest => dest.PropertyTwo, opt => opt.MapFrom(a => a.PropertyTwo));
Mapper.AssertConfigurationIsValid();
AccountViewModel viewmodel = new AccountViewModel()
{
AccountId = 3,
DateToBeIgnored = DateTime.Now,
Settings = new AccountSettingViewModel() { PropertyTwo = "AccountSettingViewModelPropTwo" }
};
Account account = new Account()
{
AccountId = 10,
DateToBeIgnored = DateTime.Now,
Settings = new AccountSetting() { PropertyOne = "AccountPropOne", PropertyTwo = "AccountPropTwo" }
};
account = Mapper.Map<AccountViewModel, Account>(viewmodel, account);
Assert.IsNotNull(account);
}
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