web-app-template/backend/app/app.Data/Migrations/20210220140309_2021_03_14.cs

using Microsoft.EntityFrameworkCore.Migrations;

namespace app.Data.Migrations
{
    public partial class _2021_03_14 : Migration
    {
        protected override void Up(MigrationBuilder migrationBuilder)
        {
            migrationBuilder.DropIndex(
                name: "IX_Users_Discriminator_Name",
                table: "Users");

            migrationBuilder.AlterColumn<string>(
                name: "Name",
                table: "Users",
                nullable: true,
                oldClrType: typeof(string),
                oldType: "varchar(255) CHARACTER SET utf8mb4",
                oldNullable: true);

            migrationBuilder.AlterColumn<string>(
                name: "Discriminator",
                table: "Users",
                nullable: false,
                oldClrType: typeof(string),
                oldType: "varchar(255) CHARACTER SET utf8mb4");
        }

        protected override void Down(MigrationBuilder migrationBuilder)
        {
            migrationBuilder.AlterColumn<string>(
                name: "Name",
                table: "Users",
                type: "varchar(255) CHARACTER SET utf8mb4",
                nullable: true,
                oldClrType: typeof(string),
                oldNullable: true);

            migrationBuilder.AlterColumn<string>(
                name: "Discriminator",
                table: "Users",
                type: "varchar(255) CHARACTER SET utf8mb4",
                nullable: false,
                oldClrType: typeof(string));

            migrationBuilder.CreateIndex(
                name: "IX_Users_Discriminator_Name",
                table: "Users",
                columns: new[] { "Discriminator", "Name" },
                unique: true);
        }
    }
}