Npgsql.EntityFrameworkCore.PostgreSQL.NodaTime 6.0.1 Prefix Reserved

Npgsql Entity Framework Core provider for PostgreSQL

Npgsql.EntityFrameworkCore.PostgreSQL is the open source EF Core provider for PostgreSQL. It allows you to interact with PostgreSQL via the most widely-used .NET O/RM from Microsoft, and use familiar LINQ syntax to express queries.

This package is a plugin which allows you to use the NodaTime date/time library when interacting with PostgreSQL; this provides a better and safer API for dealing with date and time data.

To use the plugin, simply add UseNodaTime as below and use NodaTime types in your entity properties:

await using var ctx = new BlogContext();
await ctx.Database.EnsureDeletedAsync();
await ctx.Database.EnsureCreatedAsync();

// Insert a Blog
ctx.Blogs.Add(new()
{
    Name = "FooBlog",
    CreationTime = SystemClock.Instance.GetCurrentInstant()
});
await ctx.SaveChangesAsync();

// Query all blogs created in 2020 or after
var newBlogs = await ctx.Blogs.Where(b => b.CreationTime >= Instant.FromUtc(2020, 1, 1, 0, 0, 0)).ToListAsync();

public class BlogContext : DbContext
{
    public DbSet<Blog> Blogs { get; set; }

    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        => optionsBuilder.UseNpgsql(
            @"Host=myserver;Username=mylogin;Password=mypass;Database=mydatabase",
            o => o.UseNodaTime());
}

public class Blog
{
    public int Id { get; set; }
    public string Name { get; set; }
    public Instant CreationTime { get; set; }
}

The plugin also supports translating most NodaTime methods and properties into corresponding PostgreSQL date/time operations. For more information, see the NodaTime plugin documentation page.