Same table relationship in Entity Framework

How to create a relationship between table and view in the Entity Framework

Yes, you can do this, but the GUI designer won't be able to infer it for you....The first thing the need to do is ...configure the view correctly.... The designer cannot infer the primary key, so you will need to supply that information....You can now right-click in the empty space in the designer and then choose to add an association. Define the a...

Entity Framework - querying a many-to-many relationship table

The relationship between the tables Role and Employee is represented as a navigation property - each ...Employees... property in the ...Role... entity will only contain the Employees that have this particular role....Putting it the other way round - every Employee's ...Roles... property only contains the roles that particular employee has. ...Given...

Entity Framework Code First: One-to-Many and Many-to-Many relationships to same table

EF doesn't know where ...User.Events... has to be mapped to. It could be ...Event.CreatedBy... or it could be ...Event.Users.... Both would result in a valid model. You must give EF a little hint what you want by applying the ...[InverseProperty]... attribute:...public class User { ... [InverseProperty("Users")] public virtual ICollecti...

Entity Framework 6 multiple table to one foreign key relationship code first

You can also do like the following where you make a 1 to many relationship between ...Table_1... and ...Table_2... with ...Table_3... respectively:...modelBuilder.Entity<Table_3>().HasOptional(/*Nav Prop*/).WithMany(m => m.Table_3s).HasForeignKey(f => f.ParentId).WillCascadeOnDelete(false); modelBuilder.Entity<Table_3>().HasOptional(/*Nav Prop*/).W...

Entity Framework - How to Insert to table with foreign keys without retrieving foreign table rows first

You can just include foreign key properties in addition to the navigation properties and then set them using the ids you have. If you do this will not have to go to the database to get related entities for just a sake of setting the relationship.

Delete row in table with self-referencing many-to-many relationship in Entity Framework Code First

OK, I finally managed to figure this out....The solution is modifying the Delete() stub in PersonController, like this : ...using (var context = new DataContext()) { Person person= context.Persons.Find(id); foreach (var child in person.Children.ToList()) { person.Child...

Entity Framework 1to1 relationship via association table not working in EDMX

The relationship you've shown in your first graphic is not a 1to1 relationship as far as EF is concerned....It's a many to many relationship between ...Foo... and ...Bar...Think about it this way:...Possible combinations with the following ...Foo... and ...Bar... values...Foo 1 2 3 Bar 1 2 3 FooBar 1, 1 1, 2 1, 3 2, 1 2, 2 2, 3 3, 1 3, 2 3, 3 ...

One to many relationship with junction table using Entity Framework code first

If you do not want to store the key of ...foo... in your ...bar... then you have to go for a many to many relationship. The way you will make it act like a one to many relationship is up to your implementation after, there is still a way to make sure ...bar... has only one ...foo... , but for EF6 to make the junction table, the only way to go is ma...

Insert list into multiple tables with foreign key relationship Entity Framework

You can use ...AddRange... to save the Documents list the way you want. But because you need a separate object for each Connector_Document row, you will still need a way to create them. I would suggest something like this:...using (Entities context = new Entities()) { using (var dbContextTransaction = context.Database.BeginTransaction()) { ...

Insert records into tables with master/detail relationship with Entity Framework and MVC

In ...CreateBudget... method, change the end. Something like:...context.BudgetDetails.Add(detailBudget); } _context.SaveChanges(); return detailBudget.Id; ...It gives you the created detailBudget id from EF.