public void Migrate(PersistenceMigratorRequest request, PersistenceMigratorResult result)
{
string targetMigration = null;
string connString = null;
if (request.PreviousVersion != null)
{
result.AddInfoMessage("EF Plugin: Executing rollback");
connString = request.GetConnectionString();
using (var ctx = _migratorFactory.CreateDbContext(connString))
{
var repo = _migratorFactory.CreateMigrationRepository(ctx);
targetMigration = repo.GetTargetMigration(request.PreviousVersion.Alias);
if (repo.EnsureDoesNotExist(request.Version.Alias))
{
ctx.SaveChanges();
result.AddInfoMessage($"EF Plugin: removed '{targetMigration}' from migration mapping history");
}
}
}
if (null == targetMigration)
{
result.AddInfoMessage("EF Plugin: There were no previous model migrations so nothing needed to rollback.");
}
else
{
var migrator = _migratorFactory.CreateMigrator(connString);
migrator.Update(targetMigration);
result.AddInfoMessage($"EF Plugin: Rolled back schema to migration target '{targetMigration}'");
}
}
public void Migrate(PersistenceMigratorRequest request, PersistenceMigratorResult result)
{
var connString = request.GetConnectionString();
var migrator = _migratorFactory.CreateMigrator(connString);
var lastMigration = migrator.GetLocalMigrations().OrderByDescending(s => s).FirstOrDefault();
if (null == lastMigration)
{
result.AddInfoMessage("EF Plugin: There were no model changes found so no migrations applied");
if (request.PreviousVersion != null)
{
//We have to bring the migration forward to the current version, or we won't know what to rollback to.
using (var ctx = _migratorFactory.CreateDbContext(connString))
{
_migratorFactory.CreateMigrationRepository(ctx)
.Copy(request.PreviousVersion.Alias, request.Version.Alias);
ctx.SaveChanges();
result.AddInfoMessage("EF Plugin: Added record to migration mapping history");
}
}
}
else
{
migrator.Update();
result.AddInfoMessage($"EF Plugin: Successfully executed EF migration up to '{lastMigration}'");
using (var ctx = _migratorFactory.CreateDbContext(connString))
{
_migratorFactory.CreateMigrationRepository(ctx)
.AddOrUpdate(request.Version.Alias, lastMigration);
ctx.SaveChanges();
}
result.AddInfoMessage("EF Plugin: Added record to migration mapping history");
}
}