CODEWITHSUNDEEP
entity-frameworkf#asp.net-core
Dan O'Leary
Dan O'Leary

Reputation: 2822

Can't set up entity framework core

I'm trying to set up a db context in a .net core F# web app. As part of this I need to convert the following in to F#:

services.AddDbContext<ApplicationDbContext>(options =>
            options.UseSqlite(Configuration.GetConnectionString("DefaultConnection")));

My F# version is:

services.AddDbContext<ApplicationDbContext>(fun (options: DbContextOptionsBuilder) ->
            options.UseSqlite(this.Configuration.GetConnectionString("DefaultConnection")))

However, I am getting the following exception:

No overloads match for method 'AddDbContext'. The available overloads are shown below (or in the Error List window).property Startup.Configuration: IConfigurationRoot

What could the problem be?

Upvotes: 2

Views: 447

Answers (2)

jing8956
jing8956

Reputation: 1

UseSqlite return Microsoft.EntityFrameworkCore.DbContextOptionsBuilder value, so you need ignore it to match Action<DbContextOptionsBuilder>.

services.AddDbContext<ApplicationDbContext>(fun (options: DbContextOptionsBuilder) ->
            options.UseSqlite(this.Configuration.GetConnectionString("DefaultConnection")) |> ignore)

Upvotes: 0

Dan O&#39;Leary
Dan O&#39;Leary

Reputation: 2822

The problem was that I hadn't added a constructor for ApplicationDbContext that takes a DbContextOptions as a parameter. After changing the default constructor to 

type ApplicationDbContext(options: DbContextOptions<ApplicationDbContext>) = 
      inherit IdentityDbContext<ApplicationUser>(options)

I could compile

Upvotes: 1

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