Dot Net core - 为实体问题生成代码

Question

我有一个项目在同一个解决方案资源管理器

中包含两个项目

第一个：DbModelContextProvider（类库）

第二个：AppApiProvider（MVC核心api -v3.1.4）

我想创建一个控制器API Controller with actions, using Entity Framework自动生成代码系统Nuget但是不能生成有错误

错误：there was an error running the selected code generator package restore failed rolling back pachage change for 'AppApiProvider'

我已经安装了Install-Package Microsoft.EntityFrameworkCore.Design -Version 3.1.4，但没有修复

然后在报价前搜索我的问题，但没有解决你的问题。 Quotation old

在startup.cs AppApiProvider项目中添加ConnectionString，并在appsettings.json中插入CS但不修复

startup.cs

services.AddDbContext<DB_iServiceContext>(options => options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));

在 AppDbContext 中设置 connectionString OnConfiguring(DbContextOptionsBuilder optionsBuilder)

optionsBuilder.UseSqlServer("myConStr)

AppApiProvider.csproj

    <Project Sdk="Microsoft.NET.Sdk.Web">

  <PropertyGroup>
    <TargetFramework>netcoreapp3.1</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <ProjectReference Include="..\DbModelContextProvider\DbModelContextProvider.csproj" />
  </ItemGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="3.1.4" />
    <PackageReference Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="3.1.4" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="3.1.4">
      <PrivateAssets>all</PrivateAssets>
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
    </PackageReference>
    <PackageReference Include="Microsoft.IdentityModel.Tokens" Version="6.6.0" />
    <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="3.1.3" />
    <PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="6.6.0" />
    <PackageReference Include="Z.EntityFramework.Plus.EFCore" Version="3.0.51" />
    <PackageReference Include="ZJA.Protection.Core" Version="1.0.0" />
  </ItemGroup>


</Project>

Answer 1

那是因为Microsoft.EntityFrameworkCore.Design的版本与其他包不匹配。将版本从3.1.4更改为3.1.5：

<PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="3.1.5">
  <PrivateAssets>all</PrivateAssets>
  <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
</PackageReference>

更新：

<ItemGroup>
   <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="3.1.4" />
   <PackageReference Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="3.1.4" />
   <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="3.1.5">
      <PrivateAssets>all</PrivateAssets>
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
   </PackageReference>
   <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="3.1.5" />
   <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="3.1.5" />
   <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="3.1.5">
     <PrivateAssets>all</PrivateAssets>
     <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
   </PackageReference>
   <PackageReference Include="Microsoft.IdentityModel.Tokens" Version="6.6.0" />
   <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="3.1.3" />
   <PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="6.6.0" />
   <PackageReference Include="Z.EntityFramework.Plus.EFCore" Version="3.0.51" />
   <PackageReference Include="ZJA.Protection.Core" Version="1.0.0" />
</ItemGroup>