c# - Controller and repository bound to one type- how to use second entity? -

i think worded title poorly.. here's problem:

i'm creating mvc app using ef , have implemented repository layer allow me create unit tests (with addition of ninject).

i have simplified below sake of question , please note i'm extending existing system , cannot combine two. have campaign model

public partial class campaign {     public int campaignid { get; set; }     public string name { get; set; }      public virtual campaigndetails campaigndetail { get; set; } }  public partial class campaigndetails {     public int campaigndetailsid { get; set; }     public int campaignid { get; set; }     public system.datetime? sentout { get; set; }     public string sentoutby { get; set; }     public system.datetime? lastmodified { get; set; }     public string lastmodifiedby { get; set; }      public virtual campaign campaign { get; set; } } 

every time campaign created want create campaigndetails` record.

my controller looks this:

    private readonly icampaignrepository campaignrepository;      public campaigncontroller(icampaignrepository campaignrepository)     {         this.campaignrepository = campaignrepository;     }     [httppost]     public actionresult create(campaign campaign)     {         if (modelstate.isvalid)         {             try             {                 campaignrepository.insert(campaign);                 campaignrepository.save();                 return redirecttoaction("index");             }             catch (exception ex)             {                 modelstate.addmodelerror(string.empty, "something went wrong. message: " + ex.message);             }         }          return view(campaign);     } 

as can see strongly-typed use campaign, so should create campaigndetails?

would have separate campaigndetail controller (that has no ui) , repository, , call campaigndetailcontroller.add(campaign.id) ?

or services come in handy?

 [httppost]     public actionresult create(campaign campaign,campaigndetails campaigndetails   )     {         if (modelstate.isvalid)         {             try             {                 //get campaigndetails  http parameters or seed in other way                 campaign.campaigndetails = campaigndetails;                 campaignrepository.insert(campaign);                 campaignrepository.save();                 return redirecttoaction("index");             }             catch (exception ex)             {                 modelstate.addmodelerror(string.empty, "something went wrong. message: " + ex.message);             }         }          return view(campaign);     }