public void Should_be_able_to_roundtrip_model_through_gzip()
{
var modelBuilder = new DbModelBuilder();
modelBuilder.Entity<MigrationsCustomer>();
var model = modelBuilder.Build(new DbProviderInfo(DbProviders.Sql, "2008"));
var edmxString = new StringBuilder();
using (var xmlWriter = XmlWriter.Create(edmxString, new XmlWriterSettings { Indent = true }))
{
EdmxWriter.WriteEdmx(model, xmlWriter);
}
var modelCompressor = new ModelCompressor();
var bytes = modelCompressor.Compress(model.ToXDocument());
Assert.True(bytes.Length > 2000);
var edmxXDocument = modelCompressor.Decompress(bytes);
using (var stringWriter = new StringWriter())
{
edmxXDocument.Save(stringWriter);
Assert.Equal(edmxString.ToString(), stringWriter.ToString());
}
}
public void Should_be_able_to_roundtrip_model_through_gzip()
{
var modelBuilder = new DbModelBuilder();
modelBuilder.Entity <MigrationsCustomer>();
var model = modelBuilder.Build(new DbProviderInfo(DbProviders.Sql, "2008"));
var edmxString = new StringBuilder();
using (var xmlWriter = XmlWriter.Create(
edmxString, new XmlWriterSettings
{
Indent = true
}))
{
EdmxWriter.WriteEdmx(model, xmlWriter);
}
var modelCompressor = new ModelCompressor();
var bytes = modelCompressor.Compress(model.GetModel());
Assert.True(bytes.Length > 2000);
var edmxXDocument = modelCompressor.Decompress(bytes);
using (var stringWriter = new StringWriter())
{
edmxXDocument.Save(stringWriter);
Assert.Equal(edmxString.ToString(), stringWriter.ToString());
}
}
internal ScaffoldedMigration Scaffold(string migrationName, string @namespace, bool ignoreChanges)
{
string migrationId = null;
var rescaffolding = false;
var pendingMigrations = GetPendingMigrations().ToList();
if (pendingMigrations.Any())
{
var lastMigration = pendingMigrations.Last();
if (!lastMigration.EqualsIgnoreCase(migrationName)
&& !lastMigration.MigrationName().EqualsIgnoreCase(migrationName))
{
throw Error.MigrationsPendingException(pendingMigrations.Join());
}
rescaffolding = true;
migrationId = lastMigration;
migrationName = lastMigration.MigrationName();
}
XDocument sourceModel = null;
CheckLegacyCompatibility(() => sourceModel = _currentModel);
string sourceMigrationId = null, sourceModelVersion = null;
sourceModel
= sourceModel
?? (_historyRepository.GetLastModel(out sourceMigrationId, out sourceModelVersion)
?? _emptyModel.Value);
var migrationOperations
= ignoreChanges
? Enumerable.Empty<MigrationOperation>()
: _modelDiffer.Diff(
sourceModel,
_currentModel,
_modificationCommandTreeGenerator,
SqlGenerator,
sourceModelVersion: sourceModelVersion)
.ToList();
if (!rescaffolding)
{
migrationName = _migrationAssembly.UniquifyName(migrationName);
migrationId = MigrationAssembly.CreateMigrationId(migrationName);
}
var modelCompressor = new ModelCompressor();
var scaffoldedMigration
= _configuration.CodeGenerator.Generate(
migrationId,
migrationOperations,
(sourceModel == _emptyModel.Value)
|| (sourceModel == _currentModel)
|| !sourceMigrationId.IsAutomaticMigration()
? null
: Convert.ToBase64String(modelCompressor.Compress(sourceModel)),
Convert.ToBase64String(modelCompressor.Compress(_currentModel)),
@namespace,
migrationName);
scaffoldedMigration.MigrationId = migrationId;
scaffoldedMigration.Directory = _configuration.MigrationsDirectory;
scaffoldedMigration.IsRescaffold = rescaffolding;
scaffoldedMigration.Resources.Add(DefaultSchemaResourceKey, _defaultSchema);
return scaffoldedMigration;
}
internal override void ApplyMigration(DbMigration migration, DbMigration lastMigration)
{
var migrationMetadata = (IMigrationMetadata)migration;
var compressor = new ModelCompressor();
var lastModel = GetLastModel(lastMigration, migrationMetadata.Id);
var targetModel = compressor.Decompress(Convert.FromBase64String(migrationMetadata.Target));
if (migrationMetadata.Source != null)
{
var sourceModel
= compressor.Decompress(Convert.FromBase64String(migrationMetadata.Source));
if (IsModelOutOfDate(sourceModel, lastMigration))
{
base.AutoMigrate(
migrationMetadata.Id.ToAutomaticMigrationId(),
lastModel,
sourceModel,
downgrading: false);
lastModel = sourceModel;
}
}
bool? includeSystemOps = null;
if (ReferenceEquals(lastModel, _emptyModel.Value))
{
includeSystemOps = true;
if (!targetModel.HasSystemOperations())
{
// upgrade scenario, inject the history model
_historyRepository
.AppendHistoryModel(
targetModel,
new DbProviderInfo(_usersContextInfo.ConnectionProviderName, _providerManifestToken));
}
}
var systemOperations = _modelDiffer.Diff(lastModel, targetModel, includeSystemOps)
.Where(o => o.IsSystem);
migration.Up();
ExecuteOperations(migrationMetadata.Id, targetModel, migration.Operations.Concat(systemOperations), false);
}
internal ScaffoldedMigration Scaffold(string migrationName, string @namespace, bool ignoreChanges)
{
XDocument sourceModel = null;
CheckLegacyCompatibility(() => sourceModel = _currentModel);
string sourceMigrationId = null;
sourceModel = sourceModel ?? (_historyRepository.GetLastModel(out sourceMigrationId) ?? _emptyModel.Value);
var modelCompressor = new ModelCompressor();
var migrationOperations
= ignoreChanges
? Enumerable.Empty<MigrationOperation>()
: _modelDiffer.Diff(sourceModel, _currentModel, false)
.ToList();
string migrationId;
if (migrationName.IsValidMigrationId())
{
migrationId = migrationName;
migrationName = migrationName.MigrationName();
}
else
{
migrationName = _migrationAssembly.UniquifyName(migrationName);
migrationId = MigrationAssembly.CreateMigrationId(migrationName);
}
var generatedMigration
= _configuration.CodeGenerator.Generate(
migrationId,
migrationOperations,
(sourceModel == _emptyModel.Value)
|| (sourceModel == _currentModel)
|| !sourceMigrationId.IsAutomaticMigration()
? null
: Convert.ToBase64String(modelCompressor.Compress(sourceModel)),
Convert.ToBase64String(modelCompressor.Compress(_currentModel)),
@namespace,
migrationName);
generatedMigration.MigrationId = migrationId;
generatedMigration.Directory = _configuration.MigrationsDirectory;
return generatedMigration;
}
internal override void ApplyMigration(DbMigration migration, DbMigration lastMigration)
{
var migrationMetadata = (IMigrationMetadata)migration;
var compressor = new ModelCompressor();
if (migrationMetadata.Source != null)
{
var sourceModel
= compressor.Decompress(Convert.FromBase64String(migrationMetadata.Source));
if (IsModelOutOfDate(sourceModel, lastMigration))
{
base.AutoMigrate(
migrationMetadata.Id + "_" + Strings.AutomaticMigration,
GetLastModel(lastMigration, migrationMetadata.Id),
sourceModel,
downgrading: false);
}
}
migration.Up();
var targetModel = compressor.Decompress(Convert.FromBase64String(migrationMetadata.Target));
ExecuteOperations(migrationMetadata.Id, targetModel, migration.Operations.ToList(), false);
}
internal override void ApplyMigration(DbMigration migration, DbMigration lastMigration)
{
DebugCheck.NotNull(migration);
var migrationMetadata = (IMigrationMetadata)migration;
var compressor = new ModelCompressor();
var lastModel = GetLastModel(lastMigration, migrationMetadata.Id);
var targetModel = compressor.Decompress(Convert.FromBase64String(migrationMetadata.Target));
if (migrationMetadata.Source != null)
{
var sourceModel
= compressor.Decompress(Convert.FromBase64String(migrationMetadata.Source));
if (IsModelOutOfDate(sourceModel, lastMigration))
{
base.AutoMigrate(
migrationMetadata.Id.ToAutomaticMigrationId(),
lastModel,
sourceModel,
downgrading: false);
lastModel = sourceModel;
}
}
var migrationSchema = GetDefaultSchema(migration);
var historyModel = GetHistoryModel(migrationSchema);
var systemOperations = Enumerable.Empty<MigrationOperation>();
if (ReferenceEquals(lastModel, _emptyModel.Value)
&& !base.HistoryExists())
{
systemOperations = _modelDiffer.Diff(lastModel, historyModel);
}
else
{
var lastMigrationSchema = GetLastDefaultSchema(migrationMetadata.Id);
if (!string.Equals(lastMigrationSchema, migrationSchema, StringComparison.Ordinal))
{
var lastHistoryModel = GetHistoryModel(lastMigrationSchema);
systemOperations = _modelDiffer.Diff(lastHistoryModel, historyModel);
}
}
migration.Up();
ExecuteOperations(migrationMetadata.Id, targetModel, migration.Operations, systemOperations, false);
}
private IEnumerable<string> GetHistorySchemas()
{
var modelCompressor = new ModelCompressor();
return
from migrationId in _migrationAssembly.MigrationIds
let migrationMetadata = (IMigrationMetadata)_migrationAssembly.GetMigration(migrationId)
from entitySet in
modelCompressor
.Decompress(Convert.FromBase64String(migrationMetadata.Target))
.Descendants(EdmXNames.Ssdl.EntitySetNames)
where entitySet.IsSystem()
select entitySet.SchemaAttribute();
}
