Entity Framework with MySQL 学习笔记一(复杂类型 Complex Types)

有时候我们希望在sql一个表里面的column, 一部分被分化成另一个class

典型的例子是 Address

直接看代码:

    [Table("member")]
    public class Member
    {
        [Key]
        public Int32 memberId { get; set; }
        public string name { get; set; }
        public virtual Address address { get; set; }
    }
    /*
        不能公开 - public DbSet<Address> addresss { get; set; } <-don‘t do this
    */
    [ComplexType] //写一个标签
    public class Address
    {
        /*
            这里一定要写 column 即使名字一样，因为defaul的命名法是 Address_postcode
        */
        [Column("postcode")]
        public string postcode { get; set; }
        [Column("country")]
        public string country { get; set; }
    }

insert

    db.members.Add(new Member
    {
        name = "lu xiao feng",
        address = new Address
        {
            country = "MALAYSIA",
            postcode = "81300"
        }
    });
    db.SaveChanges();