protected virtual IReadOnlyList <SqlBatch> ApplyMigration([NotNull] Migration migration)
{
Check.NotNull(migration, nameof(migration));
var migrationBuilder = new MigrationBuilder();
migration.Up(migrationBuilder);
var operations = migrationBuilder.Operations.ToList();
operations.Add(_historyRepository.GetInsertOperation(new HistoryRow(migration.Id, ProductVersion)));
var targetModel = _modelFactory.CreateModel(migration.BuildTargetModel);
return(_migrationSqlGenerator.Generate(operations, targetModel));
}
public MigrationAssembly(
[NotNull] DbContext context,
[NotNull] IEntityOptions options,
[NotNull] IMigrationModelFactory modelFactory)
{
Check.NotNull(context, nameof(context));
Check.NotNull(options, nameof(options));
Check.NotNull(modelFactory, nameof(modelFactory));
var contextType = context.GetType();
var assemblyName = RelationalOptionsExtension.Extract(options)?.MigrationsAssembly;
var assembly = assemblyName == null
? contextType.GetTypeInfo().Assembly
: Assembly.Load(new AssemblyName(assemblyName));
_migrations = new LazyRef <IReadOnlyList <Migration> >(
() => GetMigrationTypes(assembly)
.Where(t => TryGetContextType(t) == contextType)
.Select(t => (Migration)Activator.CreateInstance(t.AsType()))
.OrderBy(m => m.Id)
.ToList());
_modelSnapshot = new LazyRef <ModelSnapshot>(
() => (
from t in GetTypes(assembly)
where t.IsSubclassOf(typeof(ModelSnapshot)) &&
TryGetContextType(t) == contextType
select(ModelSnapshot) Activator.CreateInstance(t.AsType()))
.FirstOrDefault());
_lastModel = new LazyRef <IModel>(
() =>
{
if (_modelSnapshot.Value == null)
{
return(null);
}
return(modelFactory.CreateModel(_modelSnapshot.Value.BuildModel));
});
}
// 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 = _migrationAssembly.ModelSnapshot;
if (modelSnapshot == null)
{
throw new InvalidOperationException(Strings.NoSnapshot);
}
var lastModel = _migrationAssembly.LastModel;
var language = _migrationCodeGenerator.Language;
IModel model = null;
var migrations = _migrationAssembly.Migrations;
if (migrations.Count != 0)
{
var migration = migrations.Last();
model = _modelFactory.CreateModel(migration.BuildTargetModel);
if (!_modelDiffer.HasDifferences(model, lastModel))
{
if (_historyRepository.GetAppliedMigrations().Any(
e => e.MigrationId.Equals(migration.Id, StringComparison.OrdinalIgnoreCase)))
{
throw new InvalidOperationException(Strings.UnapplyMigration(migration.Id));
}
var migrationFileName = migration.Id + language;
var migrationFile = TryGetProjectFile(projectDir, migrationFileName);
if (migrationFile != null)
{
_logger.Value.LogInformation(Strings.RemovingMigration(migration.Id));
// TODO: Test version control. If broken, delete and write files in the commands
File.Delete(migrationFile);
files.MigrationFile = migrationFile;
}
else
{
_logger.Value.LogWarning(Strings.NoMigrationFile(migrationFileName, migration.GetType().FullName));
}
var migrationMetadataFileName = migration.Id + ".Designer" + language;
var migrationMetadataFile = TryGetProjectFile(projectDir, migrationMetadataFileName);
if (migrationMetadataFile != null)
{
File.Delete(migrationMetadataFile);
files.MigrationMetadataFile = migrationMetadataFile;
}
else
{
_logger.Value.LogVerbose(Strings.NoMigrationMetadataFile(migrationMetadataFileName));
}
model = migrations.Count > 1
? _modelFactory.CreateModel(migrations[migrations.Count - 2].BuildTargetModel)
: null;
}
else
{
_logger.Value.LogVerbose(Strings.ManuallyDeleted);
}
}
var modelSnapshotName = modelSnapshot.GetType().Name;
var modelSnapshotFileName = modelSnapshotName + language;
var modelSnapshotFile = TryGetProjectFile(projectDir, modelSnapshotFileName);
if (model == null)
{
if (modelSnapshotFile != null)
{
_logger.Value.LogInformation(Strings.RemovingSnapshot);
File.Delete(modelSnapshotFile);
files.ModelSnapshotFile = modelSnapshotFile;
}
else
{
_logger.Value.LogWarning(
Strings.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(Strings.RevertingSnapshot);
File.WriteAllText(modelSnapshotFile, modelSnapshotCode);
}
return(files);
}