错误:未实现方法或操作.而脚手架MYSQL数据库

Question

我正在使用.net core 2.0.我安装了以下nuget包:1:Microsoft.AspNetCore.All 2:Microsoft.EntityFrameworkCore.Tools 3:MySql.Data.EntityFrameworkCore 4:MySql.Data.EntityFrameworkCore.Design

当我尝试在包管理器控制台中使用以下命令来构建数据库时

Scaffold-DbContext "server=localhost;port=3306;user=root;password=mypass;database=SampleDB" MySql.Data.EntityFrameworkCore -OutputDir SampleEFMySQL -f

我得到以下错误.

System.NotImplementedException: The method or operation is not implemented.
   at MySql.Data.EntityFrameworkCore.Scaffolding.Internal.MySQLDatabaseModelFactory.Create(String connectionString, IEnumerable`1 tables, IEnumerable`1 schemas)
   at Microsoft.EntityFrameworkCore.Scaffolding.Internal.RelationalScaffoldingModelFactory.Create(String connectionString, IEnumerable`1 tables, IEnumerable`1 schemas, Boolean useDatabaseNames)
   at Microsoft.EntityFrameworkCore.Scaffolding.Internal.ModelScaffolder.Generate(String connectionString, IEnumerable`1 tables, IEnumerable`1 schemas, String projectPath, String outputPath, String rootNamespace, String contextName, Boolean useDataAnnotations, Boolean overwriteFiles, Boolean useDatabaseNames)
   at Microsoft.EntityFrameworkCore.Design.Internal.DatabaseOperations.ScaffoldContext(String provider, String connectionString, String outputDir, String dbContextClassName, IEnumerable`1 schemas, IEnumerable`1 tables, Boolean useDataAnnotations, Boolean overwriteFiles, Boolean useDatabaseNames)
   at Microsoft.EntityFrameworkCore.Design.OperationExecutor.ScaffoldContextImpl(String provider, String connectionString, String outputDir, String dbContextClassName, IEnumerable`1 schemaFilters, IEnumerable`1 tableFilters, Boolean useDataAnnotations, Boolean overwriteFiles, Boolean useDatabaseNames)
   at Microsoft.EntityFrameworkCore.Design.OperationExecutor.ScaffoldContext.<>c__DisplayClass0_1.<.ctor>b__0()
   at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.<>c__DisplayClass3_0`1.<Execute>b__0()
   at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.Execute(Action action)
The method or operation is not implemented.

如何使用Entity Framwork Core(在.net核心2.0中)使用MySQL

Answer 1

这似乎是Connector/NET中的一个错误:bug 89310,也报告为错误90368.

很多人(例如,这里和这里)建议切换到Pomelo.EntityFrameworkCore.MySql(在.NET Core上使用带有Entity Framework Core的MySQL).