EF Core + Cosmos Db - 一些构造函数参数 map 但不是其他的

Question

我在 Cosmos Db 中有以下 class 和数据。 从数据存储中检索数据时，某些属性在存储的数据中不存在，EF 会将它们 map 作为 null（例如MiddleName ），但DateOfBirth和PhysicalAddress参数抛出“可为空的 object 必须具有值”。 错误。 我无法找出为什么用户参数的处理方式不同。 如果数据存储中未定义/不可用，我希望将任何缺少的属性设置为 null。

public class User
    {
private User(UserId userId, IdpId idpId, string firstName, string middleName, string lastName, string suffix,
            string email, string phoneNumber, DateOnly dateOfBirth)
        {
            UserId = userId;
            IdpId = idpId;
            FirstName = firstName;
            MiddleName = middleName;
            LastName = lastName;
            Suffix = suffix;
            Email = email;
            PhoneNumber = phoneNumber;
            DateOfBirth = dateOfBirth;
        }
        public UserId UserId { get; } = UserId.New();
        public IdpId IdpId { get; set; }
        public string FirstName { get; set; }

        public string MiddleName { get; set; }
        public string LastName { get; set; }
        public string Suffix { get; set; }
        public string Email { get; set; }
        public Address PhysicalAddress { get; set; }
        public string PhoneNumber { get; set; }

        public DateOnly DateOfBirth { get; set; }
        public string ETag { get; set; }
    }

public class Address
{
    public string StreetLine1 { get; init; }
    public string StreetLine2 { get; init; }
    public string City { get; init; }
    public string State { get; init; }
    public static string Country => "US";
    public string PostalCode { get; init; }
}

存储在 Cosmos db 中的项目

{
  "UserId": "C8282366-A13C-48DF-9893-A5400DD73264",
  "Created": "2021-06-27T12:09:54.556736-04:00",
  "CreatedBy": "C8282366-A13C-48DF-9893-A5400DD73264@clients",
  "Discriminator": "User",
  "Email": "bob@bob.com",
  "FirstName": "Bob",
  "IdpId": "google-oauth2|111111111111111111111",
  "LastModified": "2021-06-28T22:16:39.068558-04:00",
  "LastModifiedBy": "C8282366-A13C-48DF-9893-A5400DD73264@clients",
  "LastName": "King",
  "id": "User|C8282366-A13C-48DF-9893-A5400DD73264"
}

调用以检索所有用户

var userList = await _dbContext.Users.ToListAsync(cancellationToken);

Answer 1

对于可能遇到此问题的任何人。 DateOnly 属性需要在构造函数和记录 class 中标记为可为空。Address 属性不能用于构造函数绑定。 请参阅： 具有构造函数的实体类型

最终记录class：

public record User
    {
private User(UserId userId, IdpId idpId, string firstName, string middleName, string lastName, string suffix,
            string email, string phoneNumber, DateOnly? dateOfBirth)
        {
            UserId = userId;
            IdpId = idpId;
            FirstName = firstName;
            MiddleName = middleName;
            LastName = lastName;
            Suffix = suffix;
            Email = email;
            PhoneNumber = phoneNumber;
            DateOfBirth = dateOfBirth;
        }
        public UserId UserId { get; } = UserId.New();
        public IdpId IdpId { get; set; }
        public string FirstName { get; set; }
        public string MiddleName { get; set; }
        public string LastName { get; set; }
        public string Suffix { get; set; }
        public string Email { get; set; }
        public Address PhysicalAddress { get; set; }
        public string PhoneNumber { get; set; }
        public DateOnly? DateOfBirth { get; set; } 
        public string ETag { get; set; }
}