c# - 模型上的字符串集合属性未在数据库中创建

Question

我创建了一个名为Tag.

public class Tag
{
    [Key]
    [DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)]
    public int TagId { get; set; }

    public string Name { get; set; }

    public virtual ICollection<string> Synonyms { get; set; }
}

我如何将Synonyms属性放入数据库？

我必须为它创建一个模型吗？

Answer 1

是的，您必须创建一个Model，也许这样做：

public class Tag
{
    [Key]
    [DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)]
    public int TagId { get; set; }

    public string Name { get; set; }

    public virtual ICollection<Synonym> Synonyms { get; set; }
}

然后你的同义词模型：

public class Synonym
{
    [Key, DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    [HiddenInput(DisplayValue = false)]
    public int SynonymId { get; set; }

    [ForeignKey("Tag"), DatabaseGenerated(DatabaseGeneratedOption.None)]
    public int TagId { get; set; }

    public string Name { get; set; }

    public virtual Tag Tag { get; set; }
}

Answer 2

您必须将其包装在实体类中

例如

public class Synonym
{
  int SynonymId {get; set;}
  string Synonym {get; set;}
}

或将您的收藏展平为单独的字符串字段

例如：

public class Tag
{
    [Key]
    [DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)]
    public int TagId { get; set; }

    public string Name { get; set; }
    public string SynStore {get; set;}
    public IEnumerable<string> Synonyms 
{
    set { SynStore = String.Join(',', value);}
    get{ return SynStore.split(','); }
}
}