Sonarr/src/NzbDrone.Core/Datastore/Migration/103_fix_metadata_file_extensions.cs

using System;
using System.Data;
using FluentMigrator;
using NzbDrone.Core.Datastore.Migration.Framework;

namespace NzbDrone.Core.Datastore.Migration
{
    [Migration(103)]
    public class fix_metadata_file_extensions : NzbDroneMigrationBase
    {
        protected override void MainDbUpgrade()
        {
            Execute.WithConnection(SetMetadataFileExtension);
        }

        private void SetMetadataFileExtension(IDbConnection conn, IDbTransaction tran)
        {
            using (var cmd = conn.CreateCommand())
            {
                cmd.Transaction = tran;
                cmd.CommandText = "SELECT Id, Extension FROM MetadataFiles";

                using (var reader = cmd.ExecuteReader())
                {
                    while (reader.Read())
                    {
                        var id = reader.GetInt32(0);
                        var extension = reader.GetString(1);
                        extension = extension.Substring(extension.LastIndexOf(".", StringComparison.InvariantCultureIgnoreCase));

                        using (var updateCmd = conn.CreateCommand())
                        {
                            updateCmd.Transaction = tran;
                            updateCmd.CommandText = "UPDATE MetadataFiles SET Extension = ? WHERE Id = ?";
                            updateCmd.AddParameter(extension);
                            updateCmd.AddParameter(id);

                            updateCmd.ExecuteNonQuery();
                        }
                    }
                }
            }
        }
    }
}