Sample EF Core Migration

SampleMigration.fs

namespace MyAPI.Migrations

open System
open System.Collections.Generic
open Microsoft.EntityFrameworkCore
open Microsoft.EntityFrameworkCore.Migrations
open Microsoft.EntityFrameworkCore.Metadata
open Microsoft.EntityFrameworkCore.Infrastructure
open Microsoft.EntityFrameworkCore.Migrations.Operations
open Microsoft.EntityFrameworkCore.Migrations.Operations.Builders

//Table Types
type WeatherEventsTable = 
    { Id : OperationBuilder<AddColumnOperation>
      Date: OperationBuilder<AddColumnOperation>
      MostCommonWord: OperationBuilder<AddColumnOperation>
      Time: OperationBuilder<AddColumnOperation>
      Type: OperationBuilder<AddColumnOperation> }


[<DbContext(typeof<WeatherContext>)>]
[<Migration("20161006200628_Init")>]
type Init() =
    inherit Migration()
    
    override this.Up(migrationBuilder: MigrationBuilder) =
        migrationBuilder.CreateTable(
            name = "WeatherEvents",
            columns = 
                (fun table -> 
                    { Id = table.Column<int>(nullable = false)
                                .Annotation("SqlServer:ValueGenerationStrategy", SqlServerValueGenerationStrategy.IdentityColumn)
                      Date = table.Column<DateTime>(nullable = false)
                      MostCommonWord = table.Column<string>(nullable = true)
                      Time = table.Column<TimeSpan>(nullable = false)
                      Type = table.Column<int>(nullable = false) }),
            constraints = 
                fun table -> 
                    table.PrimaryKey("PK_WeatherEvents", (fun x -> x.Id :> obj))|> ignore ) |> ignore
        

    override this.Down(migrationBuilder: MigrationBuilder) = 
        migrationBuilder.DropTable(name = "WeatherEvents") |> ignore

    override this.BuildTargetModel(modelBuilder: ModelBuilder) =
        modelBuilder
            .HasAnnotation("ProductVersion", "1.0.1")
            .HasAnnotation("SqlServer:ValueGenerationStrategy", SqlServerValueGenerationStrategy.IdentityColumn)
            |> ignore

        modelBuilder.Entity("MyAPI.Domain.WeatherEvent", 
            fun b ->
                b.Property<int>("Id").ValueGeneratedOnAdd() |> ignore
                b.Property<DateTime>("Date") |> ignore
                b.Property<string>("MostCommonWord") |> ignore
                b.Property<TimeSpan>("Time") |> ignore
                b.Property<int>("Type") |> ignore
                b.HasKey("Id") |> ignore
                b.ToTable("WeatherEvents") |> ignore)|> ignore