internal override void RevertMigration(
string migrationId,
DbMigration migration,
XDocument targetModel)
{
IEnumerable <MigrationOperation> systemOperations = Enumerable.Empty <MigrationOperation>();
string defaultSchema = DbMigrator.GetDefaultSchema(migration);
XDocument historyModel1 = this.GetHistoryModel(defaultSchema);
if (object.ReferenceEquals((object)targetModel, (object)this._emptyModel.Value) && !this._historyRepository.IsShared())
{
systemOperations = (IEnumerable <MigrationOperation>) this._modelDiffer.Diff(historyModel1, this._emptyModel.Value, (Lazy <ModificationCommandTreeGenerator>)null, (MigrationSqlGenerator)null, (string)null, (string)null);
}
else
{
string lastDefaultSchema = this.GetLastDefaultSchema(migrationId);
if (!string.Equals(lastDefaultSchema, defaultSchema, StringComparison.Ordinal))
{
XDocument historyModel2 = this.GetHistoryModel(lastDefaultSchema);
systemOperations = (IEnumerable <MigrationOperation>) this._modelDiffer.Diff(historyModel1, historyModel2, (Lazy <ModificationCommandTreeGenerator>)null, (MigrationSqlGenerator)null, (string)null, (string)null);
}
}
migration.Down();
this.ExecuteOperations(migrationId, new VersionedModel(targetModel, (string)null), migration.Operations, systemOperations, true, false);
}
internal override void RevertMigration(
string migrationId, DbMigration migration, XDocument targetModel)
{
var systemOperations = Enumerable.Empty <MigrationOperation>();
var migrationSchema = GetDefaultSchema(migration);
var historyModel = GetHistoryModel(migrationSchema);
if (ReferenceEquals(targetModel, _emptyModel.Value) &&
!_historyRepository.IsShared())
{
systemOperations = _modelDiffer.Diff(historyModel, targetModel);
}
else
{
var lastMigrationSchema = GetLastDefaultSchema(migrationId);
if (!string.Equals(lastMigrationSchema, migrationSchema, StringComparison.Ordinal))
{
var lastHistoryModel = GetHistoryModel(lastMigrationSchema);
systemOperations = _modelDiffer.Diff(historyModel, lastHistoryModel);
}
}
migration.Down();
ExecuteOperations(migrationId, targetModel, migration.Operations, systemOperations, downgrading: true);
}
internal override void RevertMigration(string migrationId, DbMigration migration, XDocument sourceModel, XDocument targetModel)
{
bool?includeSystemOps = null;
if (ReferenceEquals(targetModel, _emptyModel.Value) &&
!_historyRepository.IsShared())
{
includeSystemOps = true;
if (!sourceModel.HasSystemOperations())
{
// upgrade scenario, inject the history model
AttachHistoryModel(sourceModel);
}
}
var systemOperations
= _modelDiffer.Diff(sourceModel, targetModel, includeSystemOps)
.Where(o => o.IsSystem);
migration.Down();
ExecuteOperations(migrationId, targetModel, migration.Operations.Concat(systemOperations), downgrading: true);
}