Multiple projects and migrations

[rhires]

I seem to be in a bit of circular issue: I have a Web and a Business project. All my db access is in Business, and so when I'm in my Business directory, and run the command dnx ef migrations add FirstMigration, I get error messages complaining that "A type named 'StartupProduction' or 'Startup' could not be found in assembly Business" - but Startup wouldn't be here, it would be in the other directory/project. But if I do go into my Web project directory, I get different errors about there being no DbContext...

So is that right? Do I need a Startup.cs in my Business project? Or is there some kind of service I need to add (and more than a using statement that points to my Business project, since I have that) to the Startup.cs file?

PS Need to transfer this to the EF area, as it isn't really a documentation issue I have...

[smitpatel]

dupe of dotnet/efcore#2679 ?

[rhires]

Yeah, I saw that one, but I wasn't sure if that was exactly the case, even if it's similar.

My first instinct is to just create a symlink to Startup.cs from the data access project to the project main, but that's just a hack. Instead, I began looking at the EF code, but then I wondered why it got ugly when @bricelam looked at, but then I realized I didn't understand nearly enough to even properly evaluate "ugly" so I stopped.

So thinking out loud here, if dnu/dnx knows that there is another project because it's listed in the dependencies, couldn't EF ask dnu/dnx about that? Or does dnu/dnx just keep that information to itself? Anyway, I love this stuff!

[bricelam]

The Startup could not be found error should be resolved (in the nightly builds) by dotnet/efcore#3327.

We need dotnet/efcore#2679 to fully enable the scenario, and when it's in the commands would look something like this.

cd src\Business
dnx ef migrations add MyMigration --startupProject MyWebApplication

[smitpatel]

We should have some documentation about how to get EF to work when start-up and context are in different projects.
Points to include:

• How to set up startup
• How to run ef commands

[rowanmiller]

Consolidating with #204