How to automatically set CreatedOn fields with Entity Framework on saved entity and its child properties

Entity Framework via Code First, nullable property to entity field

Making use of the data annotation...Required... like this:...[Required] public int somefield {get; set;} ...somefield... will be set to...Not Null... How can I configure database ...somefield... to accept NULLs? , While using SQL Server Management Studio, I attempted to change it, but Entity Framework changed it back to ...Not Null....

How to include all underlying navigation properties automatically with entity framework

Situation: I want to add an entity with navigation properties to the database, and ...that... entity has navigation properties, and so on. In essence, every table in the database is linked to every other table....I don't want to enable Lazy loading because I use EF4.3 and the context/request pattern; it would simply take too long to load the entity...

Does Entity Framework save related classes automatically?

Assume we have these types of classes....public class A{ string someField { get; set; } public virtual B B {get; set; } } public class B { int someIntField {get; set; } [ForeignKey("Id")] [Required] public virtual A A { get; set; } } ...I make new instances of both of them in the code and make relationships like:...A a = new ...

Entity Framework will only set related entity property to "null" if I first get the property

Edit... This appears to be the case for ...any... Entity property that makes a direct connection to another entity. To put it another way, in the example below, the information that...Bar... overrides It seems like equality is unimportant....Let's say I have the upcoming classes:...public class Foo { public int? Id { get; set; } public vir...

Entity Framework 6: Adding child object to parent's list vs. setting child's navigation property to parent

I currently have a database with two tables....MailServers... and ...MailDomains... in it....MailDomains... features a foreign key column....MailServerId... indicating the...Id... foremost column in...MailServers... In this case, there is a one-to-many link....I followed ...this piece...'s instructions and used the Entity Data Model Wizard's "Code...

Entity Framework - Updating entity with added/modified child and grandchild entities

I need advise because I'm not sure if I'm going about this the appropriate manner....I have an entity, and this entity has a collection of child entities, each of which has its own collection of child entities. comparable to this (simplified example)...public MyEntity() { public long Id { get; set; } public ICollection<MyChild> Children { g...

Why child entites binds to parent automatically in entity framework

I'm unsure of whether this is a good or negative thing, or how to adjust it....Parent-child relationships are straightforward and evident. Nothing major. The code is displayed below:...Child Object:...public class Parent { public int Id {get;set;} public List<Child> Childs {get;set;} } ...Young Object...public class Child { public int I...

Entity Framework Fetch count of child entities as a property

I have two entities that show...Post... , and...Comments... ....public class Post { public int Id { get; set; } public ICollection<Comment> Comments { get; set; } //other properties //Unmapped property public int NumberOfComments { get; set; } } public class Comment { public int Id { get; set; } public Post Post { ...

EF entity is not saving child property of same entity type on update

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Entity Framework will only save navigation properties for new entities, not updates

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