Question

错误消息很明确：

“必填列'CustomerId'不在搜索结果中 “ FromSql”操作

但是以某种方式我真的没想到有CustomerId吗？

错误发生在这里：

contacts = db.Contacts.FromSql("SIP_API_MONDIA_Contacts_sel").ToList();
addresses = db.Addresses.FromSql("SIP_API_MONDIA_Address_sel").ToList();

控制器：

  public IList<Customer> GetAllCustomers()
        {
            //Initialize the objects
            IList<Customer> customers = null;
            IList<Contacts> contacts = null;
            IList<Addresses> addresses = null;

            //Fetch the data from stored procedures
            customers = db.Customers.FromSql("SomeProcName").ToList();
            contacts = db.Contacts.FromSql("SomeProcName").ToList();
            addresses = db.Addresses.FromSql("SomeProcName").ToList();

            //Loop through customers and add the contact and addresses when required
            foreach(var item in customers)
            {
                item.Contacts = contacts.Where(x => x.Customer == item.Id).ToList();
                item.Addresses = addresses.Where(x => x.Customer == item.Id).ToList();
            }
            return customers;
        }

模型：

public class Customer
    {
        public Guid Id { get; set; }
        public string Code { get; set; }
        public string Name { get; set; }
        public string VatCode { get; set; }
        public string ChamberOfCommerceCode { get; set; }
        public DateTime Modified { get; set; }
        public DateTime Created { get; set; }
        public string LanguageCode { get; set; }
        public decimal Discount { get; set; }
        public string CustomerManager { get; set; }
        public Guid PriceList { get; set; }
        public Guid PaymentCondition { get; set; }
       // public bool VatLiable { get; set; }
        public bool IsBlocked { get; set; }
        public bool IsProspect { get; set; }
        public bool IsSuspect { get; set; }
        public string Website { get; set; }
        public string DashboardUrl { get; set; }
        public string Email { get; set; }
        public string Phone { get; set; }
        public string Fax { get; set; }
        //     public ICollection<FreeFields> FreeFields { get; set; }
        //      public Dictionary<string, string> UknownElements { get; set; }
        public ICollection<Contacts> Contacts { get; set; }
        public ICollection<Addresses> Addresses { get; set; }
    }

    public class FreeFields
    {
        public string Key { get; set; }
        public string Value { get; set; }
    }

    public class Contacts
    {
        public Guid Id { get; set; }
        public string FirstName { get; set; }
        public string MiddleName { get; set; }
        public string LastName { get; set; }
        public string Initials { get; set; }
        public string Function { get; set; }    
        public Guid Customer { get; set; }
        public string Email { get; set; }
        public string Phone { get; set; }
        public string Mobile { get; set; }
        public string LanguageCode { get; set; }
        public bool IsMainContact { get; set; }
        public string Gender { get; set; }
        public string Username { get; set; }
    }
    public class Addresses
    {
        public Guid Id { get; set; }
        public string AddressLine1 { get; set; }
        public string AddressLine2 { get; set; }
        public string AddressLine3 { get; set; }
        public string Postcode { get; set; }
        public string City { get; set; }
        public string Country { get; set; }
        public string CountryCode { get; set; }
        public string Type { get; set; }
        public Guid Customer { get; set; }// This Property should be GUID instead of String..
        public bool IsMainAddress { get; set; }
        public string Route { get; set; }
        public string State { get; set; }
    }

我不能完全确定“ CustomerId”错误代表什么意思存储过程返回模型的100％精确值。

编辑以添加sql结果集&& DbContext的打印scrn：

public class IsahContext : DbContext
    {
        public  IsahContext()
        {

        }

        public IsahContext(DbContextOptions<IsahContext> options)
            : base(options)
        {
        }

        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        {
            if (!optionsBuilder.IsConfigured)
            {
                optionsBuilder.UseSqlServer(Setting.ConnectionString);
            }
        }

        protected override void OnModelCreating(ModelBuilder modelBuilder)
        {
        }

        //Entities will come here 
        public DbSet<Customer> Customers { get; set; }
        public DbSet<Addresses> Addresses { get; set; }
        public DbSet<Contacts> Contacts { get; set; }

    }

Answer 1

CustomerId是由

引入的一对多关系的外键的常规名称。

public ICollection<Contacts> Contacts { get; set; }
public ICollection<Addresses> Addresses { get; set; }

Customer类的

集合导航属性。

尽管相关类Contacts和Addresses包含属性Guid Customer，但由于其名称，该属性未被识别为外键，因此它属于No Foreign Key Property类别。 EF Core假定一个名为CustomerId的阴影属性（和列）。 Shadow property convention的解释是：

可以通过约定在发现关系但在从属实体类中找不到外键属性的情况下创建阴影属性。在这种情况下，将引入影子外键属性。影子外键属性将命名为<navigation property name><principal key property name>（命名实体使用指向主实体的依赖实体上的导航）。如果主键属性名称包含导航属性的名称，则名称将仅为<principal key property name>。如果从属实体上没有导航属性，那么将使用主体类型名称代替。

为了将Customer属性映射为FK，您应该使用ForeignKey属性：

您可以使用数据注释来配置应将哪个属性用作给定关系的外键属性。通常在约定未发现外键属性的情况下完成此操作。

提示
  [ForeignKey]批注可以放置在关系中的任一导航属性上。不需要在从属实体类中继续导航属性。

例如（因为从属实体中没有导航属性）：

[ForeignKey(nameof(Contacts.Customer))]
public ICollection<Contacts> Contacts { get; set; }

[ForeignKey(nameof(Addresses.Customer))]
public ICollection<Addresses> Addresses { get; set; }

或Fluent API：

modelBuilder.Entity<Customer>()
    .HasMany(customer => customer.Contacts)
    .WithOne() // no nav property
    .HasForeignKey(contact => contact.Customer); // the FK property

modelBuilder.Entity<Customer>()
    .HasMany(customer => customer.Addresses)
    .WithOne() // no nav property
    .HasForeignKey(address => address.Customer); // the FK property

Answer 2

您是否还可以发布数据库上下文类的相关部分以及存储过程的示例结果。

没有这些，我只能猜测：

“身份”列没有标记为[Key]属性，也没有遵循“ EntityNameId”的标准命名约定，因此无法扣除身份列。

因此，我建议将[Key]属性添加到Id属性中：

[Key]
public Guid Id { get; set; }

如果这不起作用，请发布上下文和SP结果。

'FromSql'操作的结果中不存在必需的列'CustomerId'

2 个答案: