Add project files.

MyOffice.DbContext/AppDbContextFactory.cs

@@ -0,0 +1,45 @@
+namespace MyOffice.DbContext;
+
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Design;
+
+public class AppDbContextFactory : IDesignTimeDbContextFactory<AppDbContext>
+{
+	public static AppDbContextFactory Instance = new();
+
+	public AppDbContext CreateDbContext()
+	{
+		return CreateDbContext(null);
+	}
+
+	public AppDbContext CreateDbContext(string[]? args)
+	{
+		var connection = RepositoryInitializer.ConnectionString;
+
+		var builder = new DbContextOptionsBuilder<AppDbContext>();
+
+		var provider = connection?.Provider ?? args?[0] ?? "";
+		var connectionString = connection?.ConnectionString ?? args?[1] ?? "";
+
+		if (!Enum.TryParse<AppDbContextProvidersEnum>(provider, out var providerEnum))
+			throw new InvalidOperationException($"No such provider: [{provider}]");
+
+		switch (providerEnum)
+		{
+			case AppDbContextProvidersEnum.npgsql:
+				builder.UseNpgsql(connectionString, x => x.MigrationsAssembly("MyOffice.Migrations.Postgres"));
+				break;
+			case AppDbContextProvidersEnum.sqlite:
+				builder.UseSqlite(connectionString, x => x.MigrationsAssembly("MyOffice.Migrations.Sqlite"));
+				break;
+
+			default:
+				throw new NotSupportedException($"No such provider: [{provider}]");
+		}
+
+		var db = new AppDbContext(providerEnum, builder.Options);
+		db.ChangeTracker.QueryTrackingBehavior = QueryTrackingBehavior.NoTracking;
+
+		return db;
+	}
+}