Entity Framework Code First with MySql Error

Question

Below error occurs with Entity Framework Versions 4.3+

http://www.cnblogs.com/shouzheng/archive/2012/03/09/2388177.html

(translated) Use EntityFramework the Code First Development and one case of MySql database problem

I want to use latest version of EF as migration feature is not available with version <= 4.1.

MySql.Data.MySqlClient.MySqlException (0x80004005): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'NOT NULL, ProductVersion mediumtext NOT NULL);

ALTER TABLE __MigrationH' at line 6 at MySql.Data.MySqlClient.MySqlStream.ReadPacket() at MySql.Data.MySqlClient.NativeDriver.GetResult(Int32& affectedRow, Int32& insertedId) at MySql.Data.MySqlClient.Driver.GetResult(Int32 statementId, Int32& affectedRows, Int32& insertedId) at MySql.Data.MySqlClient.Driver.NextResult(Int32 statementId, Boolean force) at MySql.Data.MySqlClient.MySqlDataReader.NextResult() at MySql.Data.MySqlClient.MySqlCommand.ExecuteReader(CommandBehavior behavior) at MySql.Data.MySqlClient.MySqlCommand.ExecuteNonQuery() at System.Data.Objects.ObjectContext.ExecuteStoreCommand(String commandText, Object[] parameters) at System.Data.Entity.Internal.InternalContext.ExecuteSqlCommand(String sql, Object[] parameters) at System.Data.Entity.Database.ExecuteSqlCommand(String sql, Object[] parameters) at System.Data.Entity.Migrations.History.HistoryRepository.BootstrapUsingEFProviderDdl(XDocument model) at System.Data.Entity.Internal.InternalContext.<SaveMetadataToDatabase>b__4() at System.Data.Entity.Internal.InternalContext.PerformInitializationAction(Action action) at System.Data.Entity.Internal.InternalContext.SaveMetadataToDatabase()
at System.Data.Entity.Internal.DatabaseCreator.CreateDatabase(InternalContext internalContext, Func __MigrationH' at line 6 at MySql.Data.MySqlClient.MySqlStream.ReadPacket() at MySql.Data.MySqlClient.NativeDriver.GetResult(Int32& affectedRow, Int32& insertedId) at MySql.Data.MySqlClient.Driver.GetResult(Int32 statementId, Int32& affectedRows, Int32& insertedId) at MySql.Data.MySqlClient.Driver.NextResult(Int32 statementId, Boolean force) at MySql.Data.MySqlClient.MySqlDataReader.NextResult() at MySql.Data.MySqlClient.MySqlCommand.ExecuteReader(CommandBehavior behavior) at MySql.Data.MySqlClient.MySqlCommand.ExecuteNonQuery() at System.Data.Objects.ObjectContext.ExecuteStoreCommand(String commandText, Object[] parameters) at System.Data.Entity.Internal.InternalContext.ExecuteSqlCommand(String sql, Object[] parameters) at System.Data.Entity.Database.ExecuteSqlCommand(String sql, Object[] parameters) at System.Data.Entity.Migrations.History.HistoryRepository.BootstrapUsingEFProviderDdl(XDocument model) at System.Data.Entity.Internal.InternalContext.<SaveMetadataToDatabase>b__4() at System.Data.Entity.Internal.InternalContext.PerformInitializationAction(Action action) at System.Data.Entity.Internal.InternalContext.SaveMetadataToDatabase()
at System.Data.Entity.Internal.DatabaseCreator.CreateDatabase(InternalContext internalContext, Func __MigrationH' at line 6 at MySql.Data.MySqlClient.MySqlStream.ReadPacket() at MySql.Data.MySqlClient.NativeDriver.GetResult(Int32& affectedRow, Int32& insertedId) at MySql.Data.MySqlClient.Driver.GetResult(Int32 statementId, Int32& affectedRows, Int32& insertedId) at MySql.Data.MySqlClient.Driver.NextResult(Int32 statementId, Boolean force) at MySql.Data.MySqlClient.MySqlDataReader.NextResult() at MySql.Data.MySqlClient.MySqlCommand.ExecuteReader(CommandBehavior behavior) at MySql.Data.MySqlClient.MySqlCommand.ExecuteNonQuery() at System.Data.Objects.ObjectContext.ExecuteStoreCommand(String commandText, Object[] parameters) at System.Data.Entity.Internal.InternalContext.ExecuteSqlCommand(String sql, Object[] parameters) at System.Data.Entity.Database.ExecuteSqlCommand(String sql, Object[] parameters) at System.Data.Entity.Migrations.History.HistoryRepository.BootstrapUsingEFProviderDdl(XDocument model) at System.Data.Entity.Internal.InternalContext.<SaveMetadataToDatabase>b__4() at System.Data.Entity.Internal.InternalContext.PerformInitializationAction(Action action) at System.Data.Entity.Internal.InternalContext.SaveMetadataToDatabase()
at System.Data.Entity.Internal.DatabaseCreator.CreateDatabase(InternalContext internalContext, Func 3 createMigrator, ObjectContext objectContext)
at System.Data.Entity.Internal.InternalContext.CreateDatabase(ObjectContext objectContext) at System.Data.Entity.Database.Create() at System.Data.Entity.DropCreateDatabaseAlways 1.InitializeDatabase(TContext context) at System.Data.Entity.Database.<>c__DisplayClass2 1.b_ 0(DbContext c) at System.Data.Entity.Internal.InternalContext.<>c _DisplayClass8.b_ 6() at System.Data.Entity.Internal.InternalContext.PerformInitializationAction(Action action) at System.Data.Entity.Internal.InternalContext.PerformDatabaseInitialization() at System.Data.Entity.Internal.LazyInternalContext.b _4(InternalContext c) at System.Data.Entity.Internal.RetryAction 1.PerformAction(TInput input) at System.Data.Entity.Internal.LazyInternalContext.InitializeDatabaseAction(Action 1 action) at System.Data.Entity.Internal.LazyInternalContext.InitializeDatabase()
at System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType) at System.Data.Entity.Internal.Linq.InternalSet 1.Initialize() at System.Data.Entity.Internal.Linq.InternalSet 1.get_InternalContext()
at System.Data.Entity.Internal.Linq.InternalSet 1.ActOnSet(Action action, EntityState newState, Object entity, String methodName) at System.Data.Entity.Internal.Linq.InternalSet 1.Add(Object entity)
at System.Data.Entity.DbSet`1.Add(TEntity entity) at DBPreparationTool.Form1.PrepareDB_Click(Object sender, EventArgs e) in D:\\Workspaces\\Experiments\\FaizeMBRoot\\Source\\DBPreparationTool\\Form1.cs:line 39 at System.Windows.Forms.Control.OnClick(EventArgs e) at System.Windows.Forms.Button.OnClick(EventArgs e) at System.Windows.Forms.ButtonBase.OnKeyUp(KeyEventArgs kevent) at System.Windows.Forms.Control.ProcessKeyEventArgs(Message& m) at System.Windows.Forms.Control.ProcessKeyMessage(Message& m) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.ButtonBase.WndProc(Message& m) at System.Windows.Forms.Button.WndProc(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Answer 1

请参阅此博客文章： http ： //brice-lambson.blogspot.com/2012/05/using-entity-framework-code-first-with.html