感谢Jeffcky大佬的博客：

EntityFramework Core 2.0全局过滤 （HasQueryFilter）

什么是值对象

没有唯一的标识，固定不变的，表示一个具体的概念，用来描述一个东西的特征，代表是什么，使用时直接添加或替换，值对象在迁移时，会以字段的形式迁移到数据库中

软删除

定义删除的接口

public interface ISoftDelete         {            bool IsDeleted { get; set; }         }

创建模型实现ISoftDelete接口

public class UserInfo : IAggregationRoot, ISoftDelete        {                 public Guid Id { get; set; }          public string UserName { get; private set; }          public string UserPassword { get; private set; }          public string UserPhone { get; private set; }          public Address Address { get; private set; }          public bool IsDeleted { get; set; }        }        [Owned]        public class Address:IValueObject        {           public string Province { get;private set; }          public string City { get; private set; }          public string County { get; private set; }          public string AddressDetails { get; private set; }            }

Lamda的扩展以及Code First 迁移配置

protected override void OnModelCreating(ModelBuilder modelBuilder)        {                      //设置软删除            foreach (var entityType in modelBuilder.Model.GetEntityTypes())            {                               var parameter = Expression.Parameter(entityType.ClrType);                //查询类上面是否有Owned（值对象）的特性                var ownedModelType = parameter.Type;                var ownedAttribute = Attribute.GetCustomAttribute(ownedModelType, typeof(OwnedAttribute));                if (ownedAttribute == null)                {                    var propertyMethodInfo = typeof(EF).GetMethod("Property").MakeGenericMethod(typeof(bool));                    var isDeletedProperty =                        Expression.Call(propertyMethodInfo, parameter, Expression.Constant("IsDeleted"));                    BinaryExpression compareExpression = Expression.MakeBinary(ExpressionType.Equal, isDeletedProperty,                        Expression.Constant(false));                    var lambda = Expression.Lambda(compareExpression, parameter);                    modelBuilder.Entity(entityType.ClrType).HasQueryFilter(lambda);                }                  }        }

在这里需要过滤掉值对象的类，在值对象的类上面声明一个特性，通过该特性过滤掉该值对象， 如果该类是值对象就直接跳过，不过滤值对象EF CORE会给值对象附加一个IsDeleted的字段，EF CORE执行中会报错，提示找不到该字段

Owned是EF CORE 配置值对象的特性，可以去自定义特性，在每一个值对象上面声明，在OnModelCreating 过滤掉包含这个特性的类

最终实现的代码：

public async Task>> GetUserList(SearchUserDto input)         {            Expression> where = e => e.IsDisable == false;            if (!string.IsNullOrEmpty(input.SearchName))            {                where = where.And(e => e.UserName.Contains(input.SearchName));            }            if (!string.IsNullOrEmpty(input.SearchPwd))            {                where = where.And(e => e.UserPhone.Contains(input.SearchPwd));            }                     var userList = await _userRepository.LoadEntityListAsync(where, e => e.UserName, "asc", input.PageIndex, input.Pagesize);            var total = await _userRepository.GetEntitiesCountAsync(where);            var userDtoList = userList.MapToList();            HeaderResult> result = new HeaderResult>            {                IsSucceed = true,                Result = userDtoList,                Total = total            };            return result;        }