Question

I’m fairly new to entity framework and patterns. How would I insert data into a child table?

I inserted the information into the parent table. Do I have to return the identity of the row and then issue another insert?

User Table and User Role.

I’ve been trying to find a solution for a day now, but I think its because I’m searching the wrong results. My structure is set up using Unit of Work/Repository Pattern.

Any help would be helpful. Thanks!

Answer 1

Get the Parent object. Add the child record to it’s navigation property.

something like this

int orderId=33;

var parent=dbContext.Orders.Where(x=>x.Id==orderId);

parent.Details.Add(new OrderDetail{ Quantity=4, ItemId=37});
parent.Details.Add(new OrderDetail{ Quantity=2, ItemId=48});

dbContext.SaveChanges();

Assuming Order is your Master entity and Detail is your child entity and dbContext is your DBContext class object.

EDIT : If you are adding it together,

Order parent=new Order { CustomerId=35, Discount=43.63 };
parent.Details.Add(new OrderDetail{ Quantity=4, ItemId=37});
parent.Details.Add(new OrderDetail{ Quantity=2, ItemId=48});

dbContext.Orders.Add(parent);
dbContext.SaveChanges();