server/aspnetapp/Migrations/20220602074714_Change_CategoryId_cannull.cs

（完整代码） 978B 

using Microsoft.EntityFrameworkCore.Migrations;

#nullable disable

namespace aspnetapp.Migrations
{
    public partial class Change_CategoryId_cannull : Migration
    {
        protected override void Up(MigrationBuilder migrationBuilder)
        {
            migrationBuilder.AlterColumn<int>(
                name: "goods_categoryid",
                table: "goods",
                type: "int",
                nullable: true,
                oldClrType: typeof(int),
                oldType: "int");
        }

        protected override void Down(MigrationBuilder migrationBuilder)
        {
            migrationBuilder.AlterColumn<int>(
                name: "goods_categoryid",
                table: "goods",
                type: "int",
                nullable: false,
                defaultValue: 0,
                oldClrType: typeof(int),
                oldType: "int",
                oldNullable: true);
        }
    }
}

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