Many to Many Relationship in MVC 5 EF6 - asp.net-mvc

Question

Im using MVC 5 and EF 6.
There are 3 tables in my code: "Leads", "Phones", "LeadStatus" and a junction table "LeadPhones".
I want to show following properties in Index View:
Leads.FullName
LeadStatus.Status
Phones.PhoneID
How should I configure the LeadController?
public partial class Leads
{
public Leads()
{
this.LeadPhones = new HashSet<LeadPhones>();
}
[Key]
public int LeadID { get; set; }
public string Title { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public string FullName { get { return NamePrefix + " " + FirstName + " " + LastName; } }
public int LeadStatusID { get; set; }
public virtual LeadStatus LeadStatus { get; set; }
public virtual ICollection<LeadPhones> LeadPhones { get; set; }
}
and
public partial class Phones
{
public Phones()
{
this.AccountPhones = new HashSet<AccountPhones>();
this.ContactPhones = new HashSet<ContactPhones>();
this.EmployeePhones = new HashSet<EmployeePhones>();
this.LeadPhones = new HashSet<LeadPhones>();
}
[Key]
public int PhoneID { get; set; }
public string PhoneNo { get; set; }
public virtual ICollection<LeadPhones> LeadPhones { get; set; }
}
and
public partial class LeadPhones
{
[Key]
public int LeadPhoneID { get; set; }
public int LeadID { get; set; }
public int PhoneID { get; set; }
public virtual Leads Leads { get; set; }
public virtual Phones Phones { get; set; }
}
and
public partial class LeadStatus
{
public LeadStatus()
{
this.Leads = new HashSet<Leads>();
}
[Key]
public int LeadStatusID { get; set; }
public string Status { get; set; }
public virtual ICollection<Leads> Leads { get; set; }
}
the following does not work:
public ActionResult Index()
{
var leads = db.Leads.Include(l => l.LeadStatus).Include(l => l.LeadPhones);
return View(leads);
}
The main problem is the "PhoneNo". How could I get that from a junction table?

Answer 1

Remove the LeadPhoneID column from the LeadPhones table -- It isn't necessary and will only cause problems for you. Remove all references to LeadPhones in your classes. Leads a virtual property to Phones (not LeadPhones). LeadPhones has a virtual property to Leads (not LeadPhones).
After you do that, then you should be able to:
var leads = db.Leads.Include(l => l.LeadStatus).Include(l => l.Phones);
public partial class Lead
{
public Lead()
{
this.Phones = new HashSet<Phone>();
}
[Key]
public int LeadID { get; set; }
public string Title { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public string FullName { get { return NamePrefix + " " + FirstName + " " + LastName; } }
public int LeadStatusID { get; set; }
public virtual LeadStatus LeadStatus { get; set; }
public virtual ICollection<Phone> Phones { get; set; }
}
public partial class Phone
{
public Phone()
{
this.AccountPhones = new HashSet<AccountPhones>();
this.ContactPhones = new HashSet<ContactPhones>();
this.EmployeePhones = new HashSet<EmployeePhones>();
this.Leads = new HashSet<Lead>();
}
[Key]
public int PhoneID { get; set; }
public string PhoneNo { get; set; }
public virtual ICollection<Lead> Leads { get; set; }
}
public partial class LeadStatus
{
public LeadStatus()
{
this.Leads = new HashSet<Lead>();
}
[Key]
public int LeadStatusID { get; set; }
public string Status { get; set; }
public virtual ICollection<Lead> Leads { get; set; }
}
I've also corrected the plurality of your classes. Lead vs Leads. The class describes a single lead, so it should be called Lead not Leads. Phone vs Phones.