MVC .Net Cascade Deleting when using EF Code First Approach

Question

I\'m pretty new to MVC and i\'m having troubles with cascade deleting. For my model I the following 2 classes:

    public class Blog
    {
        [Key]
                 


        

Answer 1

That is because EF by default does not enforce cascade deletes for optional relationships. The relationship in your model is inferred as optional.

You can add a non nullable scalar property(BlogId) of the FK

public class BlogEntry
{
    [Key]
    public int Id { get; set; }
    [Required]
    public string Title { get; set; }
    [Required]
    public string Summary { get; set; }
    [Required]
    public string Body { get; set; }
    public List Comments { get; set; }
    public List Tags { get; set; }
    public DateTime CreationDateTime { get; set; }
    public DateTime UpdateDateTime { get; set; }

    public int ParentBlogId { get; set; }

    public virtual Blog ParentBlog { get; set; }
}

Or configure this using fluent API

   modelBuilder.Entity()
            .HasRequired(b => b.ParentBlog)
            .WithMany(b => b.BlogEntries)
            .WillCascadeOnDelete(true);