ASP.NET MVC核心MySQL的身份

我使用的是第三方的MySQL EntityFrameworkCore擴展ASP.NET MVC核心MySQL的身份

「SapientGuardian.EntityFrameworkCore.MySql」：「7.1.7」

一切正常，但現在我決定用AspNetCore身份框架，所以我改變了我的DbContext到IdentityDbContext：

public class TwitchCharDbContext : IdentityDbContext<ApplicationUser, ApplicationRole, int> 
{ 
    public TwitchCharDbContext (DbContextOptions<TwitchCharDbContext> options) 
     : base(options) 
    { } 
}

當我運行命令來更新數據庫：

dotnet ef migrations add init 
dotnet ef database update

我得到這個錯誤：

System.InvalidOperationException: No mapping to a relational type can be found for the CLR type 'Microsoft.EntityFrameworkCore.Metadata.Internal.Property' 
    at Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapperExtensions.GetMapping(IRelationalTypeMapper typeMapper, IProperty property) 
    at Microsoft.EntityFrameworkCore.Migrations.MigrationsSqlGenerator.GetColumnType(String schema, String table, String name, Type clrType, Nullable`1 unicode, Nullable`1 maxLength, Boolean rowVersion, IModel model) 
    at Microsoft.EntityFrameworkCore.Migrations.MigrationsSqlGenerator.ColumnDefinition(String schema, String table, String name, Type clrType, String type, Nullable`1 unicode, Nullable`1 maxLength, Boolean rowVersion, Boolean nullable, Object defaultValue, String defaultValueSql, String computedColumnSql, IAnnotatable annotatable, IModel model, MigrationCommandListBuilder builder) 
    at MySQL.Data.Entity.Migrations.MySQLMigrationsSqlGenerator.ColumnDefinition(String schema, String table, String name, Type clrType, String type, Nullable`1 unicode, Nullable`1 maxLength, Boolean rowVersion, Boolean nullable, Object defaultValue, String defaultValueSql, String computedColumnSql, IAnnotatable annotatable, IModel model, MigrationCommandListBuilder builder) 
    at Microsoft.EntityFrameworkCore.Migrations.MigrationsSqlGenerator.ColumnDefinition(AddColumnOperation operation, IModel model, MigrationCommandListBuilder builder) 
    at Microsoft.EntityFrameworkCore.Migrations.MigrationsSqlGenerator.Generate(CreateTableOperation operation, IModel model, MigrationCommandListBuilder builder) 
    at Microsoft.EntityFrameworkCore.Migrations.MigrationsSqlGenerator.Generate(MigrationOperation operation, IModel model, MigrationCommandListBuilder builder) 
    at Microsoft.EntityFrameworkCore.Migrations.MigrationsSqlGenerator.Generate(IReadOnlyList`1 operations, IModel model) 
    at Microsoft.EntityFrameworkCore.Migrations.Internal.Migrator.GenerateUpSql(Migration migration) 
    at Microsoft.EntityFrameworkCore.Migrations.Internal.Migrator.Migrate(String targetMigration) 
    at Microsoft.EntityFrameworkCore.Design.MigrationsOperations.UpdateDatabase(String targetMigration, String contextType) 
    at Microsoft.EntityFrameworkCore.Tools.Cli.DatabaseUpdateCommand.<>c__DisplayClass0_0.<Configure>b__0() 
    at Microsoft.Extensions.CommandLineUtils.CommandLineApplication.Execute(String[] args) 
    at Microsoft.EntityFrameworkCore.Tools.Cli.Program.Main(String[] args) 
No mapping to a relational type can be found for the CLR type 'Microsoft.EntityFrameworkCore.Metadata.Internal.Property'

重要注意的是，如果我在Startup.cs改變目標數據庫MS SQL它按預期工作。

services.AddIdentity<ApplicationUser, ApplicationRole>(options => 
      { 
       options.Cookies.ApplicationCookie.ExpireTimeSpan = TimeSpan.FromDays(30); 
       options.Cookies.ApplicationCookie.SlidingExpiration = true; 
       options.Cookies.ApplicationCookie.LoginPath = new PathString("/auth/sign-in"); 
      }).AddEntityFrameworkStores<TwitchCharDbContext, int>(); 

services.AddDbContext<TwitchCharDbContext>(opt => { 
       //opt.UseSqlServer(Configuration.GetConnectionString("TwitchChar")); 
       opt.UseMySQL(
        connectionString 
       ); 
      });

謝謝

來源

2016-09-21 tomaspavlic