我们同时在项目中使用EF6和EF Core。我有其他团队成员创建的迁移。我想使用下一个命令更新数据库:
EntityFrameworkCore \更新的数据库的
但是发生了下一个错误:
EntityFrameworkCore\Update-Database : The module 'EntityFrameworkCore' could not be loaded. For more information, run 'Import-Module EntityFrameworkCore'.
At line:1 char:1
+ EntityFrameworkCore\Update-Database
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : ObjectNotFound: (EntityFrameworkCore\Update-Database:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CouldNotAutoLoadModule
写道,无法加载EF Core模块,但是在项目包文件夹中,我检查了它。
Import-Module EntityFrameworkCore命令执行结果:
Import-Module : The specified module 'EntityFrameworkCore' was not loaded because no valid module file was found in any module directory.
At line:1 char:1
+ Import-Module EntityFrameworkCore
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : ResourceUnavailable: (EntityFrameworkCore:String) [Import-Module], FileNotFoundException
+ FullyQualifiedErrorId : Modules_ModuleNotFound,Microsoft.PowerShell.Commands.ImportModuleCommand
我现在没有t understand why i can
使用它,以及为什么NPM无法使用EF Core模块。
提到了csproj文件中的这个包:
<ItemGroup>
<PackageReference Include="AutoMapper" Version="6.1.1" />
<PackageReference Include="EntityFramework" Version="6.1.3" />
<PackageReference Include="IdentityServer4" Version="1.5.2" />
<PackageReference Include="IdentityServer4.AccessTokenValidation" Version="1.2.1" />
<PackageReference Include="IdentityServer4.AspNetIdentity" Version="1.0.1" />
<PackageReference Include="IdentityServer4.EntityFramework" Version="1.0.1" />
<PackageReference Include="Microsoft.ApplicationInsights.AspNetCore" Version="2.1.1" />
<PackageReference Include="Microsoft.AspNetCore" Version="1.1.2" />
<PackageReference Include="Microsoft.AspNetCore.Authentication" Version="1.1.2" />
<PackageReference Include="Microsoft.AspNetCore.Identity" Version="1.1.2" />
<PackageReference Include="Microsoft.AspNetCore.Identity.EntityFrameworkCore" Version="1.1.2" />
<PackageReference Include="Microsoft.AspNetCore.Mvc" Version="1.1.3" />
<PackageReference Include="Microsoft.EntityFrameworkCore" Version="1.1.2" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="1.1.2" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="1.1.2" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Relational.Design" Version="1.1.2" />
<PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="1.1.2" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="1.1.1" />
<PackageReference Include="Microsoft.Extensions.Configuration" Version="1.1.2" />
<PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="1.1.2" />
<PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="1.1.2" />
<PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="1.1.1" />
<PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="1.1.2" />
<PackageReference Include="System.Linq.Dynamic" Version="1.0.7" />
</ItemGroup>
有人可以告诉我,我做错了什么?更新 - 没有EntityFrameworkCore前缀的数据库被识别。 .Net Framework 4.6.2
答案 0 :(得分:1)
我有同样的问题,我不得不改变工作方式。我把这个食谱写给了我的伙伴,我希望它可以帮助你:
“
1st.-如何添加移民:
Go to the project folder and type:
dotnet ef migrations add [NameOFYourMigrationGoesHere] -c YourContext
注意:不要忘记将创建的文件添加到源代码控制中,这不是自动魔术
第二.-如何更新你的数据库: 2.a.-在码头工人 - &gt;您可以运行该项目(完全使用Docker),并且将在第一次使用Context时应用迁移。 注意:(它将使用为该环境配置的连接字符串)
2.b.-您的本地数据库 - &gt;编辑ConfigurationContext.OnConfigure中硬编码的连接字符串并运行:
dotnet ef数据库更新--context ConfigurationContext
从SCRATCH中复制此内容的步骤:
迁移命令在.Net Core中发生了很大变化 我建议访问: https://docs.microsoft.com/en-us/ef/core/miscellaneous/cli/dotnet
1st.-您必须将这些行添加到.csproj:
<ItemGroup>
<DotNetCliToolReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Tools" Version="1.0.1" />
<DotNetCliToolReference Include="Microsoft.EntityFrameworkCore.Tools.DotNet" Version="1.0.1" />
</ItemGroup>
注意:版本可能会更改
2nd.-在您的项目中创建一个上下文,如下所示:
public class YourContext:DbContext { #region Constructors
public YourContext()
{
}
public YourContext(DbContextOptions options) : base(options)
{
}
#endregion Constructors
#region DbSets
#endregion DbSets
#region OnConfiguring
protected override void OnConfiguring(DbContextOptionsBuilder options)
{
// In order to be able to create migrations and update database:
if (!options.IsConfigured)
{
options.UseSqlServer("YourLocalConnectionStringShouldBeHere");
}
base.OnConfiguring(options);
}
#endregion
#region Model Creating
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
// Your Model Crerating Stuff
}
#endregion Model Creating
}
3rd.-为什么不按照上述步骤创建“初始”迁移?
快乐的编码!
“
我希望它可以帮到你。
涓
编辑:
此外,这里真正的问题是有不同的EF“风味”。只需转到EF根文档并查看差异:
https://docs.microsoft.com/en-us/ef/
EF 6迁移命令:https://dzone.com/articles/ef-migrations-command
EF Core迁移命令:https://docs.microsoft.com/en-us/aspnet/core/data/ef-mvc/migrations
现在我的回答似乎已经完成了。我希望这能为你节省时间。