Mysql

今日嘗試使用 EF Core with MySQL 時出現了以下的錯誤信息: MySql.Data.MySqlClient.MySqlException HResult=0x80004005 Message=Specified key was too long; max key length is 3072 bytes Source=MySql.Data StackTrace: at MySql.Data.MySqlClient.MySqlStream.ReadPacket() at MySql.Data.MySqlClient.NativeDriver.GetResult(Int32& affectedRow, Int64& 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 Microsoft.EntityFrameworkCore.Storage.Internal.RelationalCommand.Execute(IRelationalConnection connection, DbCommandMethod executeMethod, IReadOnlyDictionary<strong>2 parameterValues) at Microsoft.EntityFrameworkCore.Storage.Internal.RelationalCommand.ExecuteNonQuery(IRelationalConnection connection, IReadOnlyDictionary</strong>2 parameterValues) at Microsoft.EntityFrameworkCore.Migrations.MigrationCommand.ExecuteNonQuery(IRelationalConnection connection, IReadOnlyDictionary<strong>2 parameterValues) at Microsoft.EntityFrameworkCore.Migrations.Internal.MigrationCommandExecutor.ExecuteNonQuery(IEnumerable</strong>1 migrationCommands, IRelationalConnection connection) at Microsoft.EntityFrameworkCore.Storage.RelationalDatabaseCreator.CreateTables() at Microsoft.EntityFrameworkCore.Storage.RelationalDatabaseCreator.EnsureCreated() at Microsoft.EntityFrameworkCore.Infrastructure.DatabaseFacade.EnsureCreated() at epm.Api.Startup.Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory, ApplicationDbContext dbContext) in C:\Users\yauch\Documents\git\docker-easy-property\api\src\server\epm.Api\Startup.cs:line 65 我是使了了 Official 的 NuGet Package “MySql.Data.EntityFrameworkCore " 做了一會 research 之後發現… 是這一個 package 的問題 解決方法十分簡單.. 我們只需要用另一個 nuget package 便可”Pomelo.EntityFrameworkCore.MySql" https://www.nuget.org/packages/Pomelo.EntityFrameworkCore.MySql

2019-02-10