using Microsoft.EntityFrameworkCore; using Microsoft.EntityFrameworkCore.Design; namespace Example.Data; public sealed class PostgresApplicationDbContextFactory : IDesignTimeDbContextFactory { public PostgresApplicationDbContext CreateDbContext(string[] args) { var configuration = DesignTimeConfiguration.Create(includeDevelopmentSettings: false); var connectionString = configuration.GetConnectionString("DefaultConnection") ?? throw new InvalidOperationException("Connection string 'DefaultConnection' was not found."); var optionsBuilder = new DbContextOptionsBuilder(); optionsBuilder.UseNpgsql(connectionString); return new PostgresApplicationDbContext(optionsBuilder.Options); } }