Razor/MVC 3 Entity Framework Error Regarding Primary Key - asp.net-mvc

Question

I'm using VS 2010 with Razor/MVC 3 to create a form where User 1 submits information to a database using RequestQueue Model (this is just a queue table). User 2 then pulls this information, approves it, and the data is sent to the main database via DbRequestForm Model. This model, however, consists of several sub-models (Data_Dictionary, SERVER_DATABASE, and DatabaseRequestInfo) because the submitted data needs to go to three separate tables.
The problems is, whenever I approve the data for submission from RequestQueue to DbRequestForm, I get an error saying there is no primary key for DbRequestForm. However, there is a PK for each sub-model. I have also tried adding [Key] public int SrvrDB_ID { get; set; } and other variations to DbRequestForm to no avail.
Initial Model:
public class RequestQueue
{
[Key]
public int SrvrDB_ID { get; set; }
public string dbName { get; set; }
public int InitialSpaceNeeded { get; set; }
public string ScheduledJobSetup { get; set; }
public string PII_data { get; set; }
}
Encapsulating Model:
public class DbRequestForm
{
public Data_Dictionary Data_Dictionary { get; set; }
public DatabaseRequestInfo DatabaseRequestInfo { get; set; }
public SERVER_DATABASE SERVER_DATABASE { get; set; }
}
Models based on final three tables:
public class Data_Dictionary
{
[Key]
public int SrvrDB_ID { get; set; }
public string PII_data { get; set; }
}
public class SERVER_DATABASE
{
[Key]
public int SrvrDB_ID { get; set; }
public string dbName { get; set; }
}
public class DatabaseRequestInfo
{
[Key]
public int SrvrDB_ID { get; set; }
public int InitialSpaceNeeded { get; set; }
public string ScheduledJobSetup { get; set; }
}
Any ideas how to avoid this error? Thanks in advance!
EDIT: The specific error is '
System.Data.Edm.EdmEntityType: : EntityType 'DbRequestForm' has no key
defined. Define the key for this EntityType.
System.Data.Edm.EdmEntitySet: EntityType: EntitySet DbRequestForms is
based on type DbRequestForm that has no keys '

Answer 1

The error tells that you need to define key for DBRequestForm.
Code First would infer that a property is a primary key if the property is called ‘Id’ or ‘class name Id’.
In your case you have to add
[Key]
public int DBRequestFormId { get; set; }
This concrete error won't appear anymore.
here is detailed information how code first works
http://blogs.msdn.com/b/efdesign/archive/2010/06/01/conventions-for-code-first.aspx
see the Primary Key section