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私は2つのテーブルニュースとNewsCommentsを持っています。私はエンティティフレームワーク4.1無効な列名
構造NewsComments
public class NewsComment : BaseComment
{
public int NewsId { get; set; }
public virtual News News { get; set; }
}
しかし、問合せの戻り例外無効な列名「News_Idを」命名の規則に従いました。私はこの例外がテーブルに関連した列でないときに何を作成したのか知っています。
CREATE TABLE [dbo].[NewsComments](
[Id] [int] IDENTITY(1,1) NOT NULL,
[NewsId] [int] NOT NULL,
[Text] [varchar](max) NOT NULL,
[UserId] [int] NOT NULL,
[CommentDate] [datetime] NOT NULL,
[Ip] [varchar](40) NOT NULL, CONSTRAINT [PK_NewsComments] PRIMARY KEY CLUSTERED([Id] ASC)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]) ON [PRIMARY]
BaseComment
public abstract class BaseComment : BasePersistentEntity, IComment
{
public int UserId { get; set; }
public virtual BaseUser User { get; set; }
[Display(ResourceType = typeof(FrameworkResurce), Name = "CommentText")]
public string Text { get; set; }
[Display(ResourceType = typeof(FrameworkResurce), Name = "CommentDate")]
public DateTime CommentDate { get; set; }
public string Ip { get; set; }
}
ニュース
public class News : BaseContent
{
[Display(ResourceType = typeof(NewsResurce), Name = "NewsImage")]
public string NewsImage { get; set; }
public virtual ICollection<NewsCommentView> CommentViews { get; set; }
}
BaseContent
public abstract class BaseContent : BasePersistentEntity
{
[Display(ResourceType = typeof(FrameworkResurce), Name = "Keywords")]
public string Keywords { get; set; }
[Display(ResourceType = typeof(FrameworkResurce), Name = "TitleTranslit")]
public string TitleTranslit { get; set; }
[Required(ErrorMessageResourceType = typeof(FrameworkResurce), ErrorMessageResourceName = "IsTextEmpty")]
[Display(ResourceType = typeof(FrameworkResurce), Name = "Title")]
public string Title { get; set; }
[Display(ResourceType = typeof(FrameworkResurce), Name = "Description")]
public string Description { get; set; }
[Display(ResourceType = typeof(FrameworkResurce), Name = "Contents")]
public string Contents { get; set; }
[Display(ResourceType = typeof(FrameworkResurce), Name = "DatePublish")]
public DateTime DatePublish { get; set; }
[Display(ResourceType = typeof(FrameworkResurce), Name = "AuthorPublish")]
public string AuthorPublish { get; set; }
[Display(ResourceType = typeof(FrameworkResurce), Name = "Author")]
public string Author { get; set; }
[Display(ResourceType = typeof(FrameworkResurce), Name = "AuthorUrl")]
public string AuthorUrl { get; set; }
[Display(ResourceType = typeof(FrameworkResurce), Name = "Views")]
public int Views { get; set; }
[Display(ResourceType = typeof(FrameworkResurce), Name = "Comments")]
public int Comments { get; set; }
[Display(ResourceType = typeof(FrameworkResurce), Name = "IsComment")]
public bool IsComment { get; set; }
[Display(ResourceType = typeof(FrameworkResurce), Name = "SumVote")]
public int SumVote { get; set; }
[Display(ResourceType = typeof(FrameworkResurce), Name = "VoteCount")]
public int VoteCount { get; set; }
[NotMapped]
[Display(ResourceType = typeof(FrameworkResurce), Name = "Rating")]
public double Rating
{
get
{
if (VoteCount > 0)
{
return Math.Round((float)SumVote/VoteCount, 2);
}
return 0;
}
}
}
クエリ
private IEnumerable<NewsComment> GetComments()
{
var news = NewsCommentRepository.AllIncluding(c=>c.User,c=>c.News);
return news;
}
private DataRepository<NewsComment> NewsCommentRepository
{
get { return DataRepository<NewsComment>.Repository; }
}
DataRepository
public class DataRepository<T> where T : BasePersistentEntity
{
public static DataRepository<T> Repository
{
get
{
return new DataRepository<T>();
}
}
private readonly SGNContext<T> context = new SGNContext<T>();
public IQueryable<T> All
{
get { return this.context.Table; }
}
public IQueryable<T> AllIncluding(params Expression<Func<T, object>>[] includeProperties)
{
IQueryable<T> query = this.context.Table;
return includeProperties.Aggregate(query, (current, includeProperty) => current.Include(includeProperty));
}
public T Find(int id)
{
return this.context.Table.Find(id);
}
public void InsertOrUpdate(T country)
{
if (country.Id == default(int))
{
// New entity
this.context.Table.Add(country);
Save();
}
else
{
// Existing entity
this.context.Entry(country).State = EntityState.Modified;
Save();
}
}
public void Delete(int id)
{
var country = this.context.Table.Find(id);
this.context.Table.Remove(country);
this.Save();
}
private void Save()
{
this.context.SaveChanges();
}
}
使用GetComments
[GridAction]
public ActionResult AjaxCommentsBinding()
{
return View(new GridModel<NewsComment>
{
Data = GetComments()
});
}
NewsCommentVi EWS
CREATE VIEW [dbo].[NewsCommentViews]
AS
SELECT dbo.NewsComments.NewsId, dbo.NewsComments.Text, dbo.NewsComments.UserId, dbo.NewsComments.CommentDate, dbo.NewsComments.Ip,
dbo.Roles.RoleName, dbo.Users.UserName, dbo.Users.DateRegistered, dbo.NewsComments.Id, dbo.Users.Avatar
FROM dbo.NewsComments INNER JOIN
dbo.Users ON dbo.NewsComments.UserId = dbo.Users.Id INNER JOIN
dbo.Roles ON dbo.Users.RoleId = dbo.Roles.Id
NewsCommentViews
[Table("NewsCommentViews")]
public class NewsCommentView : NewsComment
{
public string RoleName { get; set; }
public string UserName { get; set; }
public DateTime DateRegistered { get; set; }
public string Avatar { get; set; }
}
例外を引き起こすクエリを表示できますか？おそらく 'News'と' BaseComment'クラスでしょう。 Fluent APIにマッピングコードがありますか？ – Slauma
Fluent APIを使用していません – Greg
例外をスローするクエリも表示できますか？ – Slauma