Need external dependencies to support .NET Standard in order to remove the requirement for imports in project.json

[divega]

Two of EF Core's dependencies, Remotion.Linq and Ix-Async currently use pre-existing portable targets to support multiple platforms. Until these packages add support for .NET Standard, libraries or applications using EF Core will need to specify additional import attributes in project.json.

    Package Ix-Async 1.2.5 is not compatible with netcoreapp1.0 (.NETCoreApp,Version=v1.0). 
    Package Ix-Async 1.2.5 supports:
      - net40 (.NETFramework,Version=v4.0)
      - net45 (.NETFramework,Version=v4.5)
      - portable-net45+win8+wp8 (.NETPortable,Version=v0.0,Profile=Profile78)
    Package Remotion.Linq 2.0.2 is not compatible with netcoreapp1.0 (.NETCoreApp,Version=v1.0). 
    Package Remotion.Linq 2.0.2 supports:
      - net35 (.NETFramework,Version=v3.5)
      - net40 (.NETFramework,Version=v4.0)
      - net45 (.NETFramework,Version=v4.5)
      - portable-net45+win8+wp8+wpa81 (.NETPortable,Version=v0.0,Profile=Profile259)

These two issues track the necessary changes in our dependencies:

dotnet/reactive#174
https://www.re-motion.org/jira/browse/RMLNQ-98

Cc: @natemcmaster @rowanmiller

[bickycheese]

Hi what is the supposed workaround?

[natemcmaster]

Use "imports" in project.json.

"frameworks": {
    "netcoreapp1.0": {
       "imports": "portable-net451+win8"
    }
}

[bickycheese]

Hi, still getting EntityFramework.Core 7.0.0-rc1-final is not compatible with .NETPlatform,Version=v5.0.

[davidfowl]

@stannynuytkens can you provide more details? That looks you have a bad project.json

[bickycheese]

{
"supports": {
"net46.app": {},
"dnxcore50.app": {}
},
"dependencies": {
"Microsoft.NETCore": "5.0.0",
"Microsoft.NETCore.Portable.Compatibility": "1.0.0"
},
"frameworks": {
"dotnet": {
"imports": "portable-net451+win8"
}
}
}

[bickycheese]

Just trying to add EntityFramework.Core to a 4.6.1 Portable class library for use in a .net core app.

[bickycheese]

Full output:

Restoring packages for 'BitBite.Data'.
Restoring packages for C:\Users\nuytk\Documents\Visual Studio 2015\Projects\BitBite\BitBite.Data\project.json...
Detected package downgrade: System.Reflection from 4.1.0-beta-23225 to 4.0.10
BitBite.Data (>= 1.0.0) -> EntityFramework.Core (>= 7.0.0-rc1-final) -> Microsoft.Extensions.DependencyInjection.Abstractions (>= 1.0.0-rc1-final) -> System.Reflection (>= 4.1.0-beta-23225)
BitBite.Data (>= 1.0.0) -> EntityFramework.Core (>= 7.0.0-rc1-final) -> System.Reflection (>= 4.0.10)
Detected package downgrade: System.Reflection from 4.1.0-beta-23225 to 4.0.10
BitBite.Data (>= 1.0.0) -> EntityFramework.Core (>= 7.0.0-rc1-final) -> Microsoft.Extensions.Logging.Abstractions (>= 1.0.0-rc1-final) -> System.Reflection (>= 4.1.0-beta-23225)
BitBite.Data (>= 1.0.0) -> EntityFramework.Core (>= 7.0.0-rc1-final) -> System.Reflection (>= 4.0.10)
Version conflict detected for System.Collections.
BitBite.Data (>= 1.0.0) -> EntityFramework.Core (>= 7.0.0-rc1-final) -> System.Collections (>= 4.0.11-beta-23516)
BitBite.Data (>= 1.0.0) -> Microsoft.NETCore.Portable.Compatibility (>= 1.0.0) -> Microsoft.NETCore.Runtime (>= 1.0.0) -> Microsoft.NETCore.Runtime.CoreCLR-x86 (>= 1.0.0) -> System.Collections (= 4.0.10).
EntityFramework.Core 7.0.0-rc1-final is not compatible with .NETPlatform,Version=v5.0.
Some packages are not compatible with .NETPlatform,Version=v5.0.
Ix-Async 1.2.5 is not compatible with DNXCore,Version=v5.0.
Remotion.Linq 2.0.1 is not compatible with DNXCore,Version=v5.0.
Some packages are not compatible with DNXCore,Version=v5.0.
Ix-Async 1.2.5 is not compatible with DNXCore,Version=v5.0 (win7-x86).
Remotion.Linq 2.0.1 is not compatible with DNXCore,Version=v5.0 (win7-x86).
Some packages are not compatible with DNXCore,Version=v5.0 (win7-x86).
Ix-Async 1.2.5 is not compatible with DNXCore,Version=v5.0 (win7-x64).
Remotion.Linq 2.0.1 is not compatible with DNXCore,Version=v5.0 (win7-x64).
Some packages are not compatible with DNXCore,Version=v5.0 (win7-x64).
Package restore failed for 'BitBite.Data'.
Package restore failed. Rolling back package changes for 'BitBite.Data'.
========== Finished ==========

[davidfowl]

Yea, the project.json isn't right. You can't use the dotnet TFM (it's pretty much deprecated at this point). What are you trying to do? Write a portable class library that uses EF Core?

[bickycheese]

Hi David, yeah that's about exactly what I'm trying to do. =)

[davidfowl]

First thing you need to do is install update 2 and change the portable class library to a .NET Standard class library by right clicking and using the project properties. Also make sure you have the latest version of the NuGet client