DbContextを継承したクラスの実装例

Context.cs

using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Logging.Console;

namespace SampleProject.Models
{
    public class Context : DbContext
    {

        public Context() { }

        public Context(DbContextOptions<Context> options) : base(options) { }

        public virtual DbSet<User> Users { get; set; }

        public virtual DbSet<Role> Roles { get; set; }

        public virtual DbSet<UserRole> UserRoles { get; set; }

        public static readonly LoggerFactory SampleLoggerFactory = new LoggerFactory(new[] { new ConsoleLoggerProvider((category, level) => category == DbLoggerCategory.Database.Command.Name && level == LogLevel.Information, true) });

        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        {
            if (!optionsBuilder.IsConfigured)
                optionsBuilder
                    .UseLoggerFactory(SampleLoggerFactory)
                    .UseNpgsql("Server=localhost;Database=sso;Username=*****;Password=*****;");
        }

        protected override void OnModelCreating(ModelBuilder modelBuilder)
        {
            modelBuilder.Entity<User>(entity =>
            {
                entity.ToTable(nameof(User));
                entity.Property(e => e.Id).HasColumnName(nameof(User.Id));
                entity.Property(e => e.Name).HasColumnName(nameof(User.Name));
                entity.Property(e => e.LastUpdated).HasColumnName(nameof(User.LastUpdated));
                entity.Property(e => e.GCRecord).HasColumnName(nameof(User.GCRecord));
            });
            modelBuilder.Entity<Role>(entity => {
                entity.ToTable(nameof(Role));
                entity.Property(e => e.Id).HasColumnName(nameof(Role.Id));
                entity.Property(e => e.Name).HasColumnName(nameof(Role.Name));
                entity.Property(e => e.LastUpdated).HasColumnName(nameof(Role.LastUpdated));
                entity.Property(e => e.GCRecord).HasColumnName(nameof(Role.GCRecord));
            });
            modelBuilder.Entity<UserRole>(entity =>
            {
                entity.ToTable(nameof(UserRole));
                entity.Property(e => e.Id).HasColumnName(nameof(UserRole.Id));
                entity.Property(e => e.UserId).HasColumnName(nameof(UserRole.UserId));
                entity.Property(e => e.RoleId).HasColumnName(nameof(UserRole.RoleId));
                entity.Property(e => e.LastUpdated).HasColumnName(nameof(UserRole.LastUpdated));
                entity.Property(e => e.GCRecord).HasColumnName(nameof(UserRole.GCRecord));
            });
        }

    }
}