|
private Execute ( |
||
| providerInfo | ||
| connection | IDbConnection | |
| transaction | IDbTransaction | |
| direction | MigrationDirection | |
| commandExecutor | IDbCommandExecutor | |
| 리턴 | void | |
private PersistedVersioning GetPersistedVersioning(IDbConnection connection, IDbTransaction transaction, IDbCommandExecutor executor)
{
if (_persistedVersioning == null)
{
var history = new History(_versioningTableName, _providerMetadata);
if (!_versioningTableExists.Value)
{
Debug.Assert(connection != null, "At this point, an upgrade of the versioning table is requested. This always takes part of a running migration step and therefore already has an associated connection (and possibly a transaction).");
// execute the boostrap migration to create the versioning table
var step = new BootstrapMigrationStep(new BootstrapMigration(_versioningTableName), _provider, _providerMetadata);
step.Execute(connection, transaction, MigrationDirection.Up, executor);
_versioningTableExists = new Lazy <bool>(() => true); // now, the versioning table exists
}
else
{
// load the existing entries from the versioning table
IDbConnection c = connection ?? _connectionFactory.OpenConnection(_connectionInfo);
try
{
history.Load(c, transaction);
}
finally
{
if (connection == null) // we had to open a connection ourselves
{
c.Dispose();
}
}
}
_persistedVersioning = new PersistedVersioning(history);
}
Debug.Assert(_persistedVersioning != null);
return(_persistedVersioning);
}
private PersistedVersioning GetPersistedVersioning(IDbConnection connection, IDbTransaction transaction, IDbCommandExecutor executor)
{
if (_persistedVersioning == null)
{
var history = new History(_versioningTableName, _configuration.ProviderInfo.Metadata);
if (!_versioningTableExists.Value)
{
Debug.Assert(connection != null, "At this point, an upgrade of the versioning table is requested. This always takes part of a running migration step and therefore already has an associated connection (and possibly a transaction).");
// execute the boostrap migration to create the versioning table
var step = new BootstrapMigrationStep(new BootstrapMigration(_versioningTableName), null);
step.Execute(_configuration.ProviderInfo, connection, transaction, MigrationDirection.Up, executor);
_versioningTableExists = new Lazy<bool>(() => true); // now, the versioning table exists
}
else
{
// load the existing entries from the versioning table
IDbConnection c = connection ?? _configuration.OpenConnection();
try
{
history.Load(c, transaction);
}
finally
{
if (connection == null) // we had to open a connection ourselves
{
c.Dispose();
}
}
}
_persistedVersioning = new PersistedVersioning(history);
}
Debug.Assert(_persistedVersioning != null);
return _persistedVersioning;
}