Entity Framework AutoHistory

Definition

Microsoft.EntityFrameworkCore.AutoHistory is a plugin for Microsoft.EntityFrameworkCore to support automatically recording data changes history.

AutoHistory records all the data changing history in a table named AutoHistories, this table will recording data UPDATE, DELETE history.

Enable AutoHistory

To enable the automatic recording change history, override the OnModelCreating method in your DbContext class and call EnableAutoHistory() extension method with ModelBuilder object.

public class BloggingContext : DbContext
{
    public BloggingContext(DbContextOptions<BloggingContext> options)
        : base(options)
    { }

    public DbSet<Blog> Blogs { get; set; }
    public DbSet<Post> Posts { get; set; }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        // enable auto history functionality.
        modelBuilder.EnableAutoHistory();
    }
}

Ensure AutoHistory

To ensure the automatic history, call EnsureAutoHistory() extension method with DbContext object.

using (var context = new BloggingContext())
{
    context.EnsureAutoHistory();
    // code here
}

Requirements

Entity Framework Version

• Entity Framework Core

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