entity-framework-ctp5

I am using EF4 CTP 5, CodeFirst. Please see my classes first: public class Guest { [Key] public Guid GuestID { get; set; } public Language PreferredLanguage { get; set; } public Guid? LanguageID { get; set; } } public class Language { [Key] public Guid LanguageID { get; set; } [Required(ErrorMessage = "Enter language name")] [StringLength(50, ErrorMessage = "Language name is too long")] public string LanguageName { get; set; } // in origine language } My goal is to set a certain "Delete Rule" for the Guest-Language relationship. When a language is deleted, I do not want to delete the

I have a table Person : id, name I often have queries like: select * from Person where name Like "%abc%". I have 2 questions: How do I implement this query using code-first 5 (CTP5) How do I add an index on the name column to make data retrieval faster based on name like in the query? Like operator can be performed with Contains function: var query = from p in context.Persons where p.Name.Contains("abc") select p; Index must be added by SQL - there is no special construction in EF to create index. You can execute this SQL from DB initialization. First you must implement custom initializer:

With EF4 CTP5 DbContext, what is the equivalent of this public void Refresh(Document instance) { _ctx.Refresh(RefreshMode.StoreWins, instance); } I've tried this but it doesn't do the same thing, updating the instance public void Refresh(Document instance) { _ctx.ChangeTracker.DetectChanges(); } ? You must use this: public void Refresh(Document instance) { _ctx.Entry<Document>(instance).Reload(); } The above doesn't work. Reload() method does not correctly refresh the entity from the database. It performs SQL select query but does not build proxies for the navigational properties. See the

Here is my Model: public class Customer { public int ID { get; set; } public int MailingAddressID { get; set; } public virtual Address MailingAddress { get; set; } public virtual ICollection<Address> Addresses { get; set; } } public class Address { public int ID { get; set; } public int CustomerID { get; set; } public virtual Customer Customer { get; set; } } A customer can have any number of addresses, however only one of those addresses can be a mailing address. I can get the One to One relationship and the One to Many working just fine if I only use one, but when I try and introduce both I

I'm using the mvc-mini-profiler in my project built with ASP.Net MVC 3 and Entity Framework code-first. Everything works great until I attempt to add database profiling by wrapping the connection in the ProfiledDbConnection as described in the documentation. Since I'm using a DbContext, the way I am attempting to provide the connection is through the constructor using a static factory method: public class MyDbContext : DbContext { public MyDbContext() : base(GetProfilerConnection(), true) { } private static DbConnection GetProfilerConnection() { // Code below errors //return