// TODO: DRY (file names)
public virtual MigrationFiles RemoveMigration([NotNull] string projectDir, [NotNull] string rootNamespace)
{
Check.NotEmpty(projectDir, nameof(projectDir));
Check.NotEmpty(rootNamespace, nameof(rootNamespace));
var files = new MigrationFiles();
var modelSnapshot = _migrationsAssembly.ModelSnapshot;
if (modelSnapshot == null)
{
throw new InvalidOperationException(CommandsStrings.NoSnapshot);
}
var language = _migrationCodeGenerator.FileExtension;
IModel model = null;
var migrations = _migrationsAssembly.Migrations
.Select(m => _migrationsAssembly.CreateMigration(m.Value, _activeProvider))
.ToList();
if (migrations.Count != 0)
{
var migration = migrations[migrations.Count - 1];
model = migration.TargetModel;
if (!_modelDiffer.HasDifferences(model, modelSnapshot.Model))
{
if (_historyRepository.GetAppliedMigrations().Any(
e => e.MigrationId.Equals(migration.GetId(), StringComparison.OrdinalIgnoreCase)))
{
throw new InvalidOperationException(CommandsStrings.UnapplyMigration(migration.GetId()));
}
var migrationFileName = migration.GetId() + language;
var migrationFile = TryGetProjectFile(projectDir, migrationFileName);
if (migrationFile != null)
{
_logger.Value.LogInformation(CommandsStrings.RemovingMigration(migration.GetId()));
File.Delete(migrationFile);
files.MigrationFile = migrationFile;
}
else
{
_logger.Value.LogWarning(CommandsStrings.NoMigrationFile(migrationFileName, migration.GetType().FullName));
}
var migrationMetadataFileName = migration.GetId() + ".Designer" + language;
var migrationMetadataFile = TryGetProjectFile(projectDir, migrationMetadataFileName);
if (migrationMetadataFile != null)
{
File.Delete(migrationMetadataFile);
files.MetadataFile = migrationMetadataFile;
}
else
{
_logger.Value.LogDebug(CommandsStrings.NoMigrationMetadataFile(migrationMetadataFileName));
}
model = migrations.Count > 1
? migrations[migrations.Count - 2].TargetModel
: null;
}
else
{
_logger.Value.LogDebug(CommandsStrings.ManuallyDeleted);
}
}
var modelSnapshotName = modelSnapshot.GetType().Name;
var modelSnapshotFileName = modelSnapshotName + language;
var modelSnapshotFile = TryGetProjectFile(projectDir, modelSnapshotFileName);
if (model == null)
{
if (modelSnapshotFile != null)
{
_logger.Value.LogInformation(CommandsStrings.RemovingSnapshot);
File.Delete(modelSnapshotFile);
files.SnapshotFile = modelSnapshotFile;
}
else
{
_logger.Value.LogWarning(
CommandsStrings.NoSnapshotFile(modelSnapshotFileName, modelSnapshot.GetType().FullName));
}
}
else
{
var modelSnapshotNamespace = modelSnapshot.GetType().Namespace;
var modelSnapshotCode = _migrationCodeGenerator.GenerateSnapshot(
modelSnapshotNamespace,
_contextType,
modelSnapshotName,
model);
if (modelSnapshotFile == null)
{
modelSnapshotFile = Path.Combine(
GetDirectory(projectDir, null, GetSubNamespace(rootNamespace, modelSnapshotNamespace)),
modelSnapshotFileName);
}
_logger.Value.LogInformation(CommandsStrings.RevertingSnapshot);
File.WriteAllText(modelSnapshotFile, modelSnapshotCode);
}
return(files);
}