Entity Framework Core 3.1 学习笔记2 设定字段属性

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations.Schema;

namespace Demo.Domain
{
    public class Club
    {
        public Club() {
            Players = new List<Player>();
        }

        public int Id { get; set; }

        public string Name { get; set; }


        public string City { get; set; }

        [Column(TypeName ="date")]
        public DateTime DateOffEstablishment { get; set; }

        public string History { get; set; }

        public League League { get; set; }

        public List<Player> Players { get; set; }
    }
}

　　

using System.ComponentModel.DataAnnotations;

namespace Demo.Domain
{
    public class League
    {
        public int Id { get; set; }

        [Required]
        [MaxLength(100)]
        public string Name { get; set; }

        [Required,MaxLength(50)]
        public string Country { get; set; }
    }
}

　　

Nuget包：

    <PackageReference Include="System.ComponentModel.Annotations" Version="5.0.0" />