public void AddMigration(Migration migration)
{
var migrationsAffected = new MigrationHistoryBuilder();
migrationsAffected.Append(migration);
string[] rollbackSql = migration.GenerateRollbackSql(migrationsAffected, this);
var mementos = migrationsAffected.MigrationHistory.GetMementos().ToList();
string[] deleteStatements = GenerateDeleteStatements(_databaseName, mementos);
_sql = _sql.InsertRange(0, deleteStatements);
_sql = _sql.InsertRange(0, rollbackSql);
_ahead = _ahead.Subtract(migrationsAffected.MigrationHistory);
}
public bool AddMigration(Migration migration)
{
if (_working.Contains(migration))
{
return(false);
}
foreach (var prerequisite in migration.AllPrerequisites
.Where(p => _difference.Contains(p)))
{
if (!AddMigration(prerequisite))
{
return(false);
}
}
_working = _working.Push(migration);
var migrationsAffected = new MigrationHistoryBuilder();
migrationsAffected.Append(migration);
string[] result = migration.GenerateSql(migrationsAffected, this);
_sql = _sql.AddRange(result);
var mementos = migrationsAffected.MigrationHistory.GetMementos().ToList();
_sql = _sql.Add(GenerateInsertStatement(_databaseName, mementos));
if (mementos.SelectMany(m => m.Prerequisites).SelectMany(p => p.Value).Any())
{
_sql = _sql.Add(GeneratePrerequisiteInsertStatements(_databaseName, mementos));
}
_difference = _difference.Subtract(migrationsAffected.MigrationHistory);
_working = _working.Pop();
return(true);
}
public ForwardGenerator(string databaseName, MigrationDelta difference)
{
_databaseName = databaseName;
_difference = difference;
}
public RollbackGenerator(string databaseName, MigrationDelta ahead)
{
_databaseName = databaseName;
_ahead = ahead;
}