NpgsqlEF7

ExampleContext.cs

    public string ConnectionString = @"Port=5432;Server=127.0.0.1;Database=eftest;UserId=dbuser;Password=dbpassword;";

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

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        // Make Blog.Url required
        modelBuilder.Entity<Blog>()
            .Property(b => b.url)
            .IsRequired();

        modelBuilder.Entity<Blog>()
            .Property(b => b.uuid)
            .HasDefaultValueSql("uuid_generate_v1()");

        modelBuilder.Entity<Post>()
            .Property(x => x.uuid)
            .HasDefaultValueSql("uuid_generate_v1()");
    }

    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
    {
        var path = PlatformServices.Default.Application.ApplicationBasePath;
        optionsBuilder.UseNpgsql(ConnectionString);
    }
    
    public void ConfigureServices(IServiceCollection services)
    {
        var ctx = new BloggingContext();
        services.AddEntityFramework()
            .AddNpgsql()
            .AddDbContext<BloggingContext>(options => options.UseNpgsql(ctx.ConnectionString));
    }