如何在.NET Standard 2.0映射中指定删除时不执行任何操作？ PostgreSQL的

Question

I want to define on delete no action in my .NET Standard 2.0 mapping, but I don't find how can I do it.

This is an example of my mappings:

protected override void OnModelCreating(ModelBuilder modelBuilder)
{
    modelBuilder.Entity<task>()
                .HasOne<job>(x => x.job).WithMany();
}

I'm tried using OnDelete method, but it just has options Restrict , SetNULL , Cascade and ClientSetNULL . If I don't specify OnDelete method, by default it is set to Restrict .

How can I specify no action in my mappings?

Answer 1

Table mapping independent database on entity framework. You will be use the example;

protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
    modelBuilder.Entity<Student>()
        .HasOptional<Standard>(s => s.Standard)
        .WithMany()
        .WillCascadeOnDelete(false);
}

referans: https://docs.microsoft.com/tr-tr/ef/core/saving/cascade-delete