记录一次System.Text.Json.JsonException#

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public class Article : FullAuditedEntity<Guid>
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{
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    public Article(Guid id, string title, string? content,
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        string coverImage, string classifyName,Guid classifyId, ArticleState state = ArticleState.Auditing, int collectCount = 0, int shareCount = 0,
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        int browseCount = 0, int supportCount = 0)
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    {
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        Title = title;
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        ClassifyId = classifyId;
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        BrowseCount = browseCount;
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        SupportCount = supportCount;
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        CollectCount = collectCount;
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        ShareCount = shareCount;
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        Content = content;
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        CoverImage = coverImage;
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        State = state;
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        ClassifyName = classifyName;
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        Id = id;
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    }
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    [Key, DatabaseGenerated(DatabaseGeneratedOption.None)]
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    public override Guid Id { get; protected set; }
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    /// <summary>
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    /// 文章标题
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    /// </summary>
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    [StringLength(100)]
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    public string Title { get; protected set; }
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    /// <summary>
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    /// 文章分类Id
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    /// </summary>
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    public Guid? ClassifyId { get; protected set; }
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    //public string ClassifyName { get; protected set; }
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    public Classify? Classify { get; set; }
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    /// <summary>
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    /// 浏览量
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    /// </summary>
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    public int BrowseCount { get; protected set; }
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    /// <summary>
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    /// 点赞数量
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    /// </summary>
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    public int SupportCount { get; protected set; }
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    /// <summary>
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    /// 收藏数量
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    /// </summary>
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    public int CollectCount { get; protected set; }
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    /// <summary>
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    /// 分享数量
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    /// </summary>
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    public int ShareCount { get; protected set; }
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    /// <summary>
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    /// 文章内容
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    /// </summary>
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    public string? Content { get; protected set; }
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    /// <summary>
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    /// 文章路径
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    /// </summary>
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    /// <value></value>
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    // [StringLength(64)]
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    // public string? ContentPath { get; set; }
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    /// <summary>
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    /// 封面图
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    /// </summary>
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    [StringLength(100)]
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    public string CoverImage { get; protected set; }
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    /// <summary>
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    /// 状态，0=待审核，1=审核中，2=审核通过，3=审核不通过
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    /// </summary>
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    public ArticleState State { get; protected set; }
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    }

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public class Classify : FullAuditedEntity<Guid>
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{
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    [Key, DatabaseGenerated(DatabaseGeneratedOption.None)]
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    public override Guid Id { get; protected set; }
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    /// <summary>
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    /// 分类名称
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    /// </summary>
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    [StringLength(32)]
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    public string Name { get; set; }
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    /// <summary>
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    /// 是否显示在导航栏
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    /// </summary>
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    public bool IsShowNav { get; set; } = true;
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    public List<Article> Articles { get; set; }
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    protected Classify() { }
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    public Classify AddArticle(Guid id, string title, string? content, string coverImage,string classifyName)
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    {
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        if (Articles == null)
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            Articles = new List<Article>();
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        var article = new Article(id, title, content, coverImage,classifyName,this.Id);
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        Articles.Add(article);
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        return this;
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    }

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 builder.Entity<Article>()
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             .HasOne(i => i.Classify)
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             .WithMany(i => i.Articles)
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             .HasForeignKey(i => i.ClassifyId)
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             .OnDelete(DeleteBehavior.ClientSetNull); //级联删除时给外键赋空值