Question

我尝试使用EF Codefirst和现有的MySql数据库制作一个ASP.NET Core项目当我尝试做反向工程师时（根据文章：Getting Started with EF Core on ASP.NET Core with an Existing Database ）

我有一个错误。 MySql包是：MySql.Data.EntityFrameworkCore -Version 8.0.11

我的数据库是：TEST 我的桌子是

CREATE TABLE USER (
  ID               BIGINT(20)  NOT NULL AUTO_INCREMENT,
  USERNAME         VARCHAR(50) NOT NULL,
  FIRSTNAME        VARCHAR(50) NOT NULL
) ENGINE=InnoDB;

我使用以下命令：

Scaffold-DbContext "server=localhost;port=3306;user=root;password=123;database=TEST" MySql.Data.EntityFrameworkCore -OutputDir Models

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.ReverseEngineerScaffolder.ScaffoldModel(String connectionString, IEnumerable`1 tables, IEnumerable`1 schemas, String namespace, String language, String contextDir, String contextName, ModelReverseEngineerOptions modelOptions, ModelCodeGenerationOptions codeOptions)
   at Microsoft.EntityFrameworkCore.Design.Internal.DatabaseOperations.ScaffoldContext(String provider, String connectionString, String outputDir, String outputContextDir, 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 outputDbContextDir, 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.

有人知道我怎么卖这个吗？如果像.NET Framework中的ASP.NET Web API这样的向导，有什么方法可以制作模型？

Answer 1

尝试一下对我有用。这也是NET Core兼容的MySQL连接器+ EF Core MySQL提供程序：

Pomelo.Data.MySql      
Pomelo.EntityFrameworkCore.MySql   
Pomelo.EntityFrameworkCore.MySql.Design

具有MySql现有数据库的ASP.NET Core逆向工程师模型

1 个答案: