FrontLook.IAutoHistory 8.24.525.22

AutoHistory

A plugin for Microsoft.EntityFrameworkCore to support automatically recording data changes history.

How to use

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

1. Install AutoHistory Package

Run the following command in the Package Manager Console to install Microsoft.EntityFrameworkCore.AutoHistory

PM> Install-Package Microsoft.EntityFrameworkCore.AutoHistory

2. Enable AutoHistory

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();
    }
}

3. Ensure AutoHistory in DbContext. This must be called before bloggingContext.SaveChanges() or bloggingContext.SaveChangesAsync().

bloggingContext.EnsureAutoHistory()

Use Custom AutoHistory Entity

You can use a custom auto history entity by extending the Microsoft.EntityFrameworkCore.AutoHistory class.

class CustomAutoHistory : AutoHistory
{
    public String CustomField { get; set; }
}

Then register it in the db context like follows:

modelBuilder.EnableAutoHistory<CustomAutoHistory>(o => { });

Then provide a custom history entity creating factory when calling EnsureAutoHistory. The example shows using the factory directly, but you should use a service here that fills out your history extended properties(The properties inherited from AutoHistory will be set by the framework automatically).

db.EnsureAutoHistory(() => new CustomAutoHistory()
                    {
                        CustomField = "CustomValue"
                    });

Integrate AutoHistory into other Package

Microsoft.EntityFrameworkCore.UnitOfWork had integrated this package.