错误:该方法或操作未实现.在搭建MYSQL数据库时

问题描述

我正在使用.net core 2.0.我已经安装了以下nuget软件包:1:Microsoft.AspNetCore.All2:Microsoft.EntityFrameworkCore.Tools3:MySql.Data.EntityFrameworkCore4:MySql.Data.EntityFrameworkCore.Design

I'm using .net core 2.0. I have installed the following nuget Packages:1: Microsoft.AspNetCore.All2: Microsoft.EntityFrameworkCore.Tools3: MySql.Data.EntityFrameworkCore4: MySql.Data.EntityFrameworkCore.Design

当我尝试在包管理器控制台中使用以下命令来搭建数据库时

When I try to scaffold the database using the following command in the package manager console

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

我收到以下错误消息.

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.

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

How do I work with MySQL using Entity Framwork Core(in .net core 2.0)

推荐答案

这似乎是Connector/NET中的错误:错误89310 ，也报告为错误90368 .

This appears to be a bug in Connector/NET: bug 89310, also reported as bug 90368.

许多人(例如，此处和)建议切换到 Pomelo .EntityFrameworkCore.MySql 代替(将MySQL与.NET Core上的Entity Framework Core一起使用).

Many people (e.g., here and here) recommend switching to Pomelo.EntityFrameworkCore.MySql instead (to use MySQL with Entity Framework Core on .NET Core).

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