实体框架映射联接表字段

Question

I have a join table that has a field in it that I need to get into an Entity and have it updatable. I have the Table setup below, the column I need is " PersonelleID " in the " Account " table. Now, there may be multiple, so in that case, there's a concept of primary (think of it as if you were a student who went from one school to another, you'd have the same account but multiple schools).

Any idea how I can bring this into the Entity world? Generating the database ignores this field on the join table (probably because it doesn't know where to put it).

Trying to see what the best route to go is.

Answer 1

if you are using the Code-First approach you would create an entity for the join table that has foreign keys to both Account and School and your extra properties.

public class Account
{
    public int AccountId { get; set; }
    public string UserName { get; set;}
}

public class AccountSchool
{
    [ForeignKey("Account")]
    public int AccountId { get; set; }

    [ForeignKey("School")]
    public string CEEBCodeId { get; set; }

    public string PersonelleID { get; set; }
}

public class School
{
    [Key]
    public string CEEBCodeId { get; set; }
    public string Name { get; set;}
}

This is how I've done it and here's is an article explaining how to do it as well: http://www.itq.nl/blogs/post/Code-First-Entity-Framework-Additional-properties-on-many-to-many-join-tables.aspx