public EntityFrameworkModelProcessor(
string dbContextFullTypeName,
ModelType modelTypeSymbol,
string areaName,
ICodeGenAssemblyLoadContext loader,
IDbContextEditorServices dbContextEditorServices,
IModelTypesLocator modelTypesLocator,
Workspace workspace,
IProjectContext projectContext,
IApplicationInfo applicationInfo,
IFileSystem fileSystem,
ILogger logger)
{
if (string.IsNullOrEmpty(dbContextFullTypeName))
{
throw new ArgumentException(nameof(dbContextFullTypeName));
}
_dbContextFullTypeName = dbContextFullTypeName;
_modelTypeSymbol = modelTypeSymbol;
_areaName = areaName;
_dbContextEditorServices = dbContextEditorServices;
_modelTypesLocator = modelTypesLocator;
_logger = logger;
_loader = loader;
_projectContext = projectContext;
_applicationInfo = applicationInfo;
_fileSystem = fileSystem;
_workspace = workspace;
_assemblyAttributeGenerator = GetAssemblyAttributeGenerator();
}
private async Task GenerateNewDbContextAndRegister(ModelType startupType, ModelType programType)
{
AssemblyAttributeGenerator assemblyAttributeGenerator = GetAssemblyAttributeGenerator();
_startupEditResult = new EditSyntaxTreeResult()
{
Edited = false
};
ValidateEFSqlServerDependency();
// Create a new Context
_logger.LogMessage(string.Format(MessageStrings.GeneratingDbContext, _dbContextFullTypeName));
var dbContextTemplateModel = new NewDbContextTemplateModel(_dbContextFullTypeName, _modelTypeSymbol, programType);
_dbContextSyntaxTree = await _dbContextEditorServices.AddNewContext(dbContextTemplateModel);
ContextProcessingStatus = ContextProcessingStatus.ContextAdded;
if (startupType != null)
{
_startupEditResult = _dbContextEditorServices.EditStartupForNewContext(startupType,
dbContextTemplateModel.DbContextTypeName,
dbContextTemplateModel.DbContextNamespace,
dataBaseName: dbContextTemplateModel.DbContextTypeName + "-" + Guid.NewGuid().ToString());
}
if (!_startupEditResult.Edited)
{
ContextProcessingStatus = ContextProcessingStatus.ContextAddedButRequiresConfig;
// The created context would anyway fail to fetch metadata with a crypic message
// It's better to throw with a meaningful message
throw new InvalidOperationException(string.Format("{0} {1}", MessageStrings.FailedToEditStartup, MessageStrings.EnsureStartupClassExists));
}
_logger.LogMessage(MessageStrings.CompilingWithAddedDbContext);
var projectCompilation = await _workspace.CurrentSolution.Projects
.First(project => project.AssemblyName == _projectContext.AssemblyName)
.GetCompilationAsync();
_reflectedTypesProvider = GetReflectedTypesProvider(
projectCompilation,
c =>
{
c = c.AddSyntaxTrees(assemblyAttributeGenerator.GenerateAttributeSyntaxTree());
c = c.AddSyntaxTrees(_dbContextSyntaxTree);
if (_startupEditResult.Edited)
{
c = c.ReplaceSyntaxTree(_startupEditResult.OldTree, _startupEditResult.NewTree);
}
return(c);
});
var compilationErrors = _reflectedTypesProvider.GetCompilationErrors();
_dbContextError = string.Format(
MessageStrings.DbContextCreationError,
(compilationErrors == null
? string.Empty
: string.Join(Environment.NewLine, compilationErrors)));
_dbContextSyntaxTree = _dbContextSyntaxTree.WithFilePath(GetPathForNewContext(dbContextTemplateModel.DbContextTypeName, _areaName));
}
public async Task <ContextProcessingResult> GetModelMetadata(string dbContextFullTypeName, ModelType modelTypeSymbol, string areaName)
{
Type dbContextType;
SyntaxTree dbContextSyntaxTree = null;
EditSyntaxTreeResult startUpEditResult = new EditSyntaxTreeResult()
{
Edited = false
};
ContextProcessingStatus state = ContextProcessingStatus.ContextAvailable;
var dbContextSymbols = _modelTypesLocator.GetType(dbContextFullTypeName).ToList();
var startupType = _modelTypesLocator.GetType("Startup").FirstOrDefault();
var programType = _modelTypesLocator.GetType("Program").FirstOrDefault();
Type modelReflectionType = null;
ReflectedTypesProvider reflectedTypesProvider = null;
string dbContextError = string.Empty;
AssemblyAttributeGenerator assemblyAttributeGenerator = GetAssemblyAttributeGenerator();
if (dbContextSymbols.Count == 0)
{
ValidateEFSqlServerDependency();
// Create a new Context
_logger.LogMessage(string.Format(MessageStrings.GeneratingDbContext, dbContextFullTypeName));
var dbContextTemplateModel = new NewDbContextTemplateModel(dbContextFullTypeName, modelTypeSymbol, programType);
dbContextSyntaxTree = await _dbContextEditorServices.AddNewContext(dbContextTemplateModel);
state = ContextProcessingStatus.ContextAdded;
// Edit startup class to register the context using DI
if (startupType != null)
{
startUpEditResult = _dbContextEditorServices.EditStartupForNewContext(startupType,
dbContextTemplateModel.DbContextTypeName,
dbContextTemplateModel.DbContextNamespace,
dataBaseName: dbContextTemplateModel.DbContextTypeName + "-" + Guid.NewGuid().ToString());
}
if (!startUpEditResult.Edited)
{
state = ContextProcessingStatus.ContextAddedButRequiresConfig;
// The created context would anyway fail to fetch metadata with a crypic message
// It's better to throw with a meaningful message
throw new InvalidOperationException(string.Format("{0} {1}", MessageStrings.FailedToEditStartup, MessageStrings.EnsureStartupClassExists));
}
_logger.LogMessage(MessageStrings.CompilingWithAddedDbContext);
var projectCompilation = await _workspace.CurrentSolution.Projects
.First(project => project.AssemblyName == _projectContext.AssemblyName)
.GetCompilationAsync();
reflectedTypesProvider = new ReflectedTypesProvider(
projectCompilation,
c =>
{
c = c.AddSyntaxTrees(assemblyAttributeGenerator.GenerateAttributeSyntaxTree());
c = c.AddSyntaxTrees(dbContextSyntaxTree);
if (startUpEditResult.Edited)
{
c = c.ReplaceSyntaxTree(startUpEditResult.OldTree, startUpEditResult.NewTree);
}
return(c);
},
_projectContext,
_loader,
_logger);
var compilationErrors = reflectedTypesProvider.GetCompilationErrors();
dbContextError = string.Format(
MessageStrings.DbContextCreationError,
(compilationErrors == null
? string.Empty
: string.Join(Environment.NewLine, compilationErrors)));
// Add file information
dbContextSyntaxTree = dbContextSyntaxTree.WithFilePath(GetPathForNewContext(dbContextTemplateModel.DbContextTypeName, areaName));
}
else
{
var addResult = _dbContextEditorServices.AddModelToContext(dbContextSymbols.First(), modelTypeSymbol);
var projectCompilation = await _workspace.CurrentSolution.Projects
.First(project => project.AssemblyName == _projectContext.AssemblyName)
.GetCompilationAsync();
if (addResult.Edited)
{
state = ContextProcessingStatus.ContextEdited;
dbContextSyntaxTree = addResult.NewTree;
_logger.LogMessage(MessageStrings.CompilingWithModifiedDbContext);
reflectedTypesProvider = new ReflectedTypesProvider(
projectCompilation,
c =>
{
c = c.AddSyntaxTrees(assemblyAttributeGenerator.GenerateAttributeSyntaxTree());
var oldTree = c.SyntaxTrees.FirstOrDefault(t => t.FilePath == addResult.OldTree.FilePath);
if (oldTree == null)
{
throw new InvalidOperationException(string.Format(
MessageStrings.ModelTypeCouldNotBeAdded,
modelTypeSymbol.FullName,
dbContextFullTypeName));
}
return(c.ReplaceSyntaxTree(oldTree, addResult.NewTree));
},
_projectContext,
_loader,
_logger);
var compilationErrors = reflectedTypesProvider.GetCompilationErrors();
dbContextError = string.Format(
MessageStrings.DbContextCreationError,
(compilationErrors == null
? string.Empty
: string.Join(Environment.NewLine, compilationErrors)));
}
else
{
_logger.LogMessage(MessageStrings.CompilingInMemory);
reflectedTypesProvider = new ReflectedTypesProvider(
projectCompilation,
c =>
{
c = c.AddSyntaxTrees(assemblyAttributeGenerator.GenerateAttributeSyntaxTree());
return(c);
},
_projectContext,
_loader,
_logger);
dbContextError = string.Format(MessageStrings.DbContextTypeNotFound, dbContextFullTypeName);
}
}
dbContextType = reflectedTypesProvider.GetReflectedType(
modelType: dbContextFullTypeName,
lookInDependencies: true);
if (dbContextType == null)
{
throw new InvalidOperationException(dbContextError);
}
modelReflectionType = reflectedTypesProvider.GetReflectedType(
modelType: modelTypeSymbol.FullName,
lookInDependencies: true);
if (modelReflectionType == null)
{
throw new InvalidOperationException(string.Format(MessageStrings.ModelTypeNotFound, modelTypeSymbol.Name));
}
var reflectedStartupType = reflectedTypesProvider.GetReflectedType(
modelType: startupType.FullName,
lookInDependencies: true);
if (reflectedStartupType == null)
{
throw new InvalidOperationException(string.Format(MessageStrings.ModelTypeNotFound, reflectedStartupType.Name));
}
_logger.LogMessage(string.Format(MessageStrings.GettingEFMetadata, modelTypeSymbol.Name));
var metadata = GetModelMetadata(dbContextType, modelReflectionType, reflectedStartupType);
// Write the DbContext/Startup if getting the model metadata is successful
if (dbContextSyntaxTree != null)
{
PersistSyntaxTree(dbContextSyntaxTree);
if (state == ContextProcessingStatus.ContextAdded || state == ContextProcessingStatus.ContextAddedButRequiresConfig)
{
_logger.LogMessage(string.Format(MessageStrings.AddedDbContext, dbContextSyntaxTree.FilePath.Substring(_applicationInfo.ApplicationBasePath.Length)));
if (state != ContextProcessingStatus.ContextAddedButRequiresConfig)
{
PersistSyntaxTree(startUpEditResult.NewTree);
}
else
{
_logger.LogMessage(MessageStrings.AdditionalSteps);
}
}
}
return(new ContextProcessingResult()
{
ContextProcessingStatus = state,
ModelMetadata = metadata
});
}