数据库恢复后无法生成EFG

Question

我正在使用实体框架核心 .Net 2.2 和 Microsoft SqlServer 2017 并尝试更新由实体框架代码生成器生成的模型（数据库优先方法）。我最初能够创建我所有的实体和映射。我对数据库进行了更改，并使用 .bkp 文件进行了还原，以更新本地 sql server 实例上的副本。

更新后，我在包管理器控制台中使用以下 cli 命令， efg generate -c "Server=localhost\SQLEXPRESS;Database=SOLA_DEV;Trusted_Connection=True;"

但我收到以下错误。有谁知道我做错了什么或从哪里开始调查？它告诉我实例失败，但我连接良好。我已经尝试确保在 sqlserver 中更新了架构，备份后我的所有更新都是可见的。我尝试创建一个新的解决方案并从同一个数据库生成，但我得到了同样的错误。

12:48:21 I Loading options file: generation.yml
12:48:21 I Loading database model ...
12:48:21 F Host terminated unexpectedly
System.InvalidOperationException: Instance failure.
   at System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, Boolean withFailover)
   at System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean ignoreSniOpenTimeout, TimeoutTimer timeout, Boolean withFailover)
   at System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString connectionOptions, SqlCredential credential, TimeoutTimer timeout)
   at System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(TimeoutTimer timeout, SqlConnectionString connectionOptions, SqlCredential credential, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance)
   at System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, Object providerInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString userConnectionOptions, SessionData reconnectSessionData, Boolean applyTransientFaultHandling, String accessToken)
   at System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions)
   at System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnectionPool pool, DbConnection owningObject, DbConnectionOptions options, DbConnectionPoolKey poolKey, DbConnectionOptions userOptions)
   at System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection)
   at System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection)
   at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection)
   at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection)
   at System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection)
   at System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
   at System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry)
   at System.Data.SqlClient.SqlConnection.Open()
   at Microsoft.EntityFrameworkCore.SqlServer.Scaffolding.Internal.SqlServerDatabaseModelFactory.Create(DbConnection connection, IEnumerable`1 tables, IEnumerable`1 schemas)
   at Microsoft.EntityFrameworkCore.SqlServer.Scaffolding.Internal.SqlServerDatabaseModelFactory.Create(String connectionString, IEnumerable`1 tables, IEnumerable`1 schemas)
   at EntityFrameworkCore.Generator.CodeGenerator.GetDatabaseModel(IDatabaseModelFactory factory) in C:\projects\entityframeworkcore-generator\src\EntityFrameworkCore.Generator.Core\CodeGenerator.cs:line 248
   at EntityFrameworkCore.Generator.CodeGenerator.Generate(GeneratorOptions options) in C:\projects\entityframeworkcore-generator\src\EntityFrameworkCore.Generator.Core\CodeGenerator.cs:line 41
   at EntityFrameworkCore.Generator.GenerateCommand.OnExecute(CommandLineApplication application) in C:\projects\entityframeworkcore-generator\src\EntityFrameworkCore.Generator\GenerateCommand.cs:line 76
--- End of stack trace from previous location where exception was thrown ---
   at McMaster.Extensions.CommandLineUtils.Conventions.ExecuteMethodConvention.Invoke(MethodInfo method, Object instance, Object[] arguments)
   at McMaster.Extensions.CommandLineUtils.Conventions.ExecuteMethodConvention.OnExecute(ConventionContext context)
   at McMaster.Extensions.CommandLineUtils.Conventions.ExecuteMethodConvention.<>c__DisplayClass0_0.<<Apply>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at McMaster.Extensions.CommandLineUtils.CommandLineApplication.<>c__DisplayClass142_0.<OnExecute>b__0()
   at EntityFrameworkCore.Generator.Program.Main(String[] args) in C:\projects\entityframeworkcore-generator\src\EntityFrameworkCore.Generator\Program.cs:line 50

generation.yml 文件自生成后未更改。

  namespace: '{Database.Name}'
  directory: .\
database:
  connectionName: ConnectionStrings:Generator
  userSecretsId: //Removed for example
data:
  context:
    name: '{Database.Name}Context'
    baseClass: DbContext
    namespace: '{Project.Namespace}.Data'
    directory: '{Project.Directory}\Data'
  entity:
    namespace: '{Project.Namespace}.Data.Entities'
    directory: '{Project.Directory}\Data\Entities'
  mapping:
    namespace: '{Project.Namespace}.Data.Mapping'
    directory: '{Project.Directory}\Data\Mapping'
  query:
    generate: true
    indexPrefix: By
    uniquePrefix: GetBy
    namespace: '{Project.Namespace}.Data.Queries'
    directory: '{Project.Directory}\Data\Queries'
model:
  shared:
    namespace: '{Project.Namespace}.Domain.Models'
    directory: '{Project.Directory}\Domain\Models'
  read:
    generate: true
    name: '{Entity.Name}ReadModel'
  create:
    generate: true
    name: '{Entity.Name}CreateModel'
  update:
    generate: true
    name: '{Entity.Name}UpdateModel'
  mapper:
    generate: true
    name: '{Entity.Name}Profile'
    baseClass: AutoMapper.Profile
    namespace: '{Project.Namespace}.Domain.Mapping'
    directory: '{Project.Directory}\Domain\Mapping'
  validator:
    generate: true
    name: '{Model.Name}Validator'
    baseClass: AbstractValidator<{Model.Name}>
    namespace: '{Project.Namespace}.Domain.Validation'
    directory: '{Project.Directory}\Domain\Validation'

Answer 1

我发现了这个问题，如果您遇到实例故障，通常这意味着您的连接字符串有问题。一旦解决了这个问题，代码就会按预期生成。