EF 复杂语句的使用

//EF多重排序
context.Serials
.Where(s => ("," + s.VideoGenreIds + ",").Contains("," + genreIds + ",") && s.IsEnable && !s.IsDel)
.OrderByDescending(v => v.Weight)
.ThenByDescending(v => v.Hot)
.Skip((currentPage - 1) * pageSize)
.Take(pageSize)
.Select(v => new SerialBriefModel
{
Id = v.Id,
SerialName = v.SerialName,
LastEpisode = v.LastEpisode,
Description = v.Description,
PicturePath = v.PicturePath,
AddTime = v.AddTime
}).ToList();

//EF group的使用以及 两表连接

var model = context.Serials
.Where(s => s.Id == serialId && s.IsEnable && !s.IsDel)
.GroupJoin(context.SerialEpisodes.Where(e=>!e.IsDel), s => s.Id, e => e.SerialId, (s, e)
=> new SerialDetailModel
{
Id = s.Id,
SerialName = s.SerialName,
VideoAreaId = s.VideoAreaId,
VideoAreaName = s.VideoArea.AreaName,
VideoGenreIds = s.VideoGenreIds,
VideoLanguageId = s.VideoLanguageId,
VideoLanguageName = s.VideoLanguage.Language,
TotalEpisodes = s.TotalEpisodes,
LastEpisode = s.LastEpisode,
Director = s.Director,
Starring = s.Starring,
ReleaseYear = s.ReleaseYear,
PicturePath = s.PicturePath,
Description = s.Description,
Fee = s.VideoChargeMethod.Fee,
Hot = s.Hot,
Score = s.Score,
SerialEpisodes = e.OrderBy(se => se.SerialIndex).Select(se => new SerialEpisodeModel
{
Id = se.Id,
SerialIndex = se.SerialIndex,
TagName = se.SerialTag.TagName,
Title = se.Title,
Description = se.Description
}
).ToList()
}).FirstOrDefault();