entity-framework-4.1

I have a class called Client mapped to a database table using Entity Framework code first. The table has a computed field that I need available in my Client class, but I understand that it won't be possible to write to this field. Is there a way of configuring Entity Framework to ignore the property when saving, but include the property when reading? I have tried using the Ignore method in my configuration class, or using the [NotMapped] attribute, but these prevent the property from being read from the database. You can use DatabaseGeneratedAttribute with DatabaseGeneratedOption.Computed

I has two classes named Contact and ContactField as following. When the ContactField is added into Contact , I hope to assign SortOrder to ContactField automatically. Do I need to inherit DbSet and customize the Add method ? How to achieve it ? public class Foo { private MyDbContext _db = new MyDbContext(); public void HelloWorld() { Contact contact = ....; //< A contact from database. ContactField field = ....; ///< A new field .... ///< assign other properties into this `field` field.FieldType = FieldType.Phone; // How to automatically update `SortOrder` // when adding field into

I understand stored procedures mapping is not supported by my understanding is that I should be able to call stored procedures. I have quite a few complex stored procedures and with the designer I could create a complex type and I was all good. Now in code first let's suppose I have the following stored procedure, just put together something silly to give an idea. I want to return a student with 1 address. In code I have A Student and Address Entity. But no StudentAddressEntity as it's a link table. I have tried the following but I get an error Incorrect syntax near '."} System.Data.Common

I need to automatically insert the current date when I create a new order in my EF 4.1 MVC3 web application. I also need to automatically add the currently logged in user - I'm using forms authentication. After searching the web, I found that I need to override the SaveChanges() function and an article on StackOverflow showed how to do this: Entity Framework 4.1 Automatic date . However, I couldn't get the code to work. Where does this code go? How do I find out what is? Sorry if the question is trivial - I'm new to EF. B. You can override in your context class, public partial class

THE TABLES: Shop Product Category THE RELATIONSHIPS: (Shop) 1 <---> n (Categories) (Shop) 1 <---> n (Products) (Categories) n <---> n (Products) THE CASCADE DELETES: Shop ---> Categories ... I defined this using fluent API Shop ---> Products ... I defined this using fluent API Categories <---> Products ... EF 4.1 automatically defines cascade for "Category_Product" join table THE PROBLEM: Above results in a "multiple" cascade deletion path exception. POTENTIAL FIXES: Remove the ManyToManyConvention, but that means I must manually perform deletes for every join table in the system, which is

The situation: Sometimes a database schema is not what you would consider an ideal representation of the system's information and you may not be able to change it. We have been using Entity Framework to create a nicer conceptual model to code against in situations like this. This means updating the model from the database and then changing it ourselves, either through the designer or through the .edmx file directly using a text editor. The problem: When you update the model from the database, all your carefully made changes are thrown out the window. This can make adding new entities a real

I am relatively new to the Code First approach to Entity Framework. I have used the Database First approach for a while now, but the Code First seems to be a better fit for the application I am currently developing. I am working with an existing MS SQL database, and I am not allowed to make any changes whatsoever to the database. The reason why I am using Code First is because the Fluent API allows me to dynamically assign a table name to a class. That said, I have a predicament where I need to assign a relationship between 2 tables. One table, ArCodes, has a composite key made up of the