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POEntity Framework Code First navigational properties returning null fields
 

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  1. POEntity Framework Code First navigational properties returning null fields
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    <p>For a program I'm using EF code first for the first time. In the past I used linq to SQL en EF DbFirst. When retreiving the main record'I'm unable to load the subrecords using the navigational properties. I get an empty subrecord with all record-fields are 0 or null.</p> <p>When I want to apply eager loading. the .Include(x=>x.......) isn't showing my navigationals.</p> <p>I have set up the following classes:</p> <pre><code>public Record() { Shipping = new ShippingData(); Delivery = new DeliveryData(); Items = new List&lt;Item&gt;(); ImportDate = DateTime.Now; } [Key] public int RecordId { get; set; } public int ShippingId { get; set; } public int DeliveryId { get; set; } public DateTime ImportDate { get; set; } public virtual ShippingData Shipping { get; set; } public virtual DeliveryData Delivery { get; set; } public virtual List&lt;Item&gt; Items { get; set; } public virtual Collecting CollectingOrder { get; set; } </code></pre> <p>with the following context:</p> <pre><code>public class TweemansContext : DbContext { public TweemansContext() : base("xxxx") { } public DbSet&lt;Add.Record&gt; Records { get; set; } public DbSet&lt;Add.ShippingData&gt; Shipping { get; set; } public DbSet&lt;Add.DeliveryData&gt; Delivery { get; set; } public DbSet&lt;Add.Item&gt; ProductItems { get; set; } public DbSet&lt;Add.Kolli&gt; Kolli { get; set; } public DbSet&lt;Add.Collecting&gt; CollectingOrders { get; set; } protected override void OnModelCreating(DbModelBuilder modelBuilder) { base.OnModelCreating(modelBuilder); modelBuilder.Entity&lt;Record&gt;().HasRequired(s =&gt; s.Shipping) .WithMany() .HasForeignKey(s =&gt; s.ShippingId); modelBuilder.Entity&lt;Record&gt;().HasRequired(d =&gt; d.Delivery) .WithMany() .HasForeignKey(d =&gt; d.DeliveryId); modelBuilder.Entity&lt;Record&gt;().HasOptional(c =&gt; c.CollectingOrder) .WithOptionalDependent(a =&gt; a.Record).Map(p =&gt; p.MapKey("CollectionID")); } } </code></pre> <p>the delivery class is a public class as wel as follows:</p> <pre><code> public class DeliveryData { [Key] public int DeliveryId { get; set; } public virtual Record Record { get; set; } ....lots of public properties </code></pre> <p>now when I try to use lazy loading all my properties of the delivery class are null using the following code:</p> <pre><code>using (TweemansContext context = new TweemansContext()) { var imported = (from record in context.Records where record.ImportDate.Year == date.Year &amp;&amp; record.ImportDate.Month == date.Month &amp;&amp; record.ImportDate.Day == date.Day select record).ToList(); foreach (var Record in imported) { string email; string telnr; CustomerService service = new CustomerService(connectionString); **string servicenr = Record.Delivery.AccountNumber.Substring(2, 8);** service.GetUserData(servicenr, out email, out telnr); Record.Delivery.Email = email; Record.Delivery.TelephoneNbr = telnr; } context.SaveChanges(); } </code></pre> <p>on the rows with the ** my debugger is telling me that delivery exists but all of it's properties are null.</p> <p>When wanting to apply an include as follows the .include isn't showing my navigation:</p> <pre><code> var imported = (from record in context.Records.Include(x=&gt;x.) where record.ImportDate.Year == date.Year &amp;&amp; record.ImportDate.Month == date.Month &amp;&amp; record.ImportDate.Day == date.Day select record).ToList(); </code></pre> <p>What am I doing wrong, or which part have i misuderstood??</p>
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    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USLuuk Krijnen
    1. USLuuk Krijnen
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
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      1. PTAnswer
    2. PO
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      1. PTAnswer
    1. VO
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      1. POEntity Framework Code First navigational properties returning null fields
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
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      1. POEntity Framework Code First navigational properties returning null fields
      1. This table or related slice is empty.
      1. VTUpMod
    1. COin your Context constructor add these lines: `Configuration.LazyLoadingEnabled = true; Configuration.ProxyCreationEnabled = true;`
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      1. POEntity Framework Code First navigational properties returning null fields
      1. USManish Mishra
    2. COTried it but without any succes to my problem.
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      1. POEntity Framework Code First navigational properties returning null fields
      1. USLuuk Krijnen
 

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