Question

我正在使用PostGre作为我的RoleProvider。那是我的DbContext。

public class MembershipDbContext : DbContext
{
    public DbSet<User> Users { get; set; }
    public DbSet<Role> Roles { get; set; }
    public DbSet<RoleUser> RoleUsers { get; set; }

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        modelBuilder.Entity<User>().ToTable("Users");
        modelBuilder.Entity<Role>().ToTable("Roles");
        modelBuilder.Entity<RoleUser>().ToTable("RoleUser");
    }
}

模特：

public class User
{
    public virtual ICollection<Role> Roles { get; set; }

    public int UserId { get; set; }
    public string UserName { get; set; }
    public string Password { get; set; }
    public string PasswordSalt { get; set; }
}

public class Role
{
    public virtual ICollection<User> Users { get; set; }

    public int RoleId { get; set; }
    public string Name { get; set; }
}

public class RoleUser
{
    [Key, ForeignKey("Role"), Column(Order = 0)]
    public int RoleId { get; set; }
    [Key, ForeignKey("User"), Column(Order = 1)]
    public int UserId { get; set; }

    public virtual Role Role { get; set; }
    public virtual User User { get; set; }
}

问题示例：

    var dbContext = new MembershipDbContext();

    var users = dbContext.Users.ToList();
    var roles = dbContext.Roles.ToList();

    //it says: "ERROR: 42P01: relation "dbo.RoleUser1" not exist"
    var rolesOfFirstUser = users[0].Roles;//not working 
    var usersOfFirstRole = roles[0].Users;//not working

    var roleUsers = dbContext.RoleUsers.ToList();//all links works perfect

我该怎么做才能让它发挥作用？ This answer fixes它，但我不知道EF在哪里创建“RoleUsers”链接表。我需要它。

P.S。抱歉英文不好。

Answer 1

您实际上应该将这些集合（在两个文件上）指向RoleUser，即以下内容：

public virtual ICollection<RoleUser> RoleUsers {get;set;}

实体框架中的链接表

1 个答案: