实体框架：子表中的记录未插入

Question

Records in parent table are saving successfully but child table records are not saving and no error is coming, using Entity Framework with repository pattern available here .

Below is the sample schema design of my tables, might be a special case.

Considering above tables if I try to insert records in Table2 and Table3 together no record inserted into Table3.

Please let me know if need further clarification on the question.

Thanks in advance!!

EDIT 1

Below is the code I am using to insert parent and child records together.

    var parent = new Table2()
    {
        Table1Id = 1,
        SecondColumn = 1
    };

    parent.Tables3.Add(new Table3()
    {
        Table1Id = 1,
        SecondColumn = 1,
        AnotherColumn = 1
    });

    context.Set<Table2>().Attach(parent);
    context.Entry<Table2>(parent).State = EntityState.Added;
    context.SaveChanges();

EDIT 2

public partial class Table2
{
    public Table2()
    {
        this.Tables3 = new HashSet<Table3>();
    }

    public int Table1Id { get; set; }
    public int SecondColumn { get; set; }

    public virtual ICollection<Table3> Tables3 { get; set; }
}

public partial class Table3
{
    public int Table1Id { get; set; }
    public int SecondColumn { get; set; }
    public int AnotherColumn { get; set; }
}

Answer 1

You should do one of two:

1. Use add instead of attach

   var parent = new Table2() { Table1Id = 1, SecondColumn = 1 }; parent.Tables3.Add(new Table3() { Table1Id = 1, SecondColumn = 1, AnotherColumn = 1 }); context.Set<Table2>().Add(parent); context.SaveChanges();

In this case all navigation properties will also be added.

2. Paint your whole graph with state after attach (now you set state only to parent table).