public void MigrateDown(
MongoDbContext context,
string downVersion)
{
try
{
if (context.MigrationsAssembly == null)
{
throw new NullReferenceException("Не указана сборка с миграциями");
}
if (downVersion.Length != 14 ||
!long.TryParse(downVersion, out _))
{
throw new InvalidOperationException("Указана невалидная версия");
}
context.ExecuteTransaction(database =>
{
var migrationVersions = GetMigrationsInfo(database, context.MigrationsAssembly);
var tempVersion = GetTempVersion(database, out var collection);
var sortedMigrationVersions = migrationVersions
.OrderBy(x => long.Parse(x.Version))
.Where(x => long.Parse(x.Version) > long.Parse(downVersion))
.Where(x => long.Parse(x.Version) <= long.Parse(tempVersion));
var collectionExists = GetVersionCollectionExists(database);
if (!collectionExists)
{
database.CreateCollection(VERSION_INFO_COLLECTION);
}
foreach (var migrationInfo in sortedMigrationVersions)
{
var migration = migrationInfo.Migration;
migration.Down();
var versionInfo = new MongoVersionInfo
{
Date = DateTime.UtcNow,
Description = migrationInfo.Description,
ToVersion = migrationInfo.Version,
FromVersion = tempVersion
};
collection.InsertOne(versionInfo);
}
});
}
catch (Exception e)
{
var message = $"Ошибка во время откатывания " +
$"миграций из сборки {context.MigrationsAssembly} " +
$"до версии {downVersion}";
throw new MongoException(message, e);
}
}
public void MigrateUp(MongoDbContext context)
{
try
{
if (context.MigrationsAssembly == null)
{
throw new NullReferenceException("Не указана сборка с миграциями");
}
context.ExecuteTransaction(database =>
{
var migrationData = GetMigrationsInfo(database, context.MigrationsAssembly);
var tempVersion = GetTempVersion(database, out var collection);
var sortedMigrationData = migrationData
.OrderBy(x => long.Parse(x.Version))
.Where(x => long.Parse(x.Version) > long.Parse(tempVersion))
.ToArray();
var collectionExists = GetVersionCollectionExists(database);
if (!collectionExists)
{
database.CreateCollection(VERSION_INFO_COLLECTION);
}
foreach (var migrationInfo in sortedMigrationData)
{
var migration = migrationInfo.Migration;
migration.Up();
var versionInfo = new MongoVersionInfo
{
Date = DateTime.UtcNow,
Description = migrationInfo.Description,
ToVersion = migrationInfo.Version,
FromVersion = tempVersion
};
collection.InsertOne(versionInfo);
}
});
}
catch (Exception e)
{
var message = $"Ошибка во время накатывания " +
$"миграций из сборки {context.MigrationsAssembly}";
throw new MongoException(message, e);
}
}
