public static IList <Yw_SubjectKnowledge> Fetch(
QuestionInputModel subject,
SubjectBll bll,
int currentUser,
out IEnumerable <int> toDelete)
{
Check.IfNull(subject, nameof(subject));
Check.IfNull(bll, nameof(bll));
if (currentUser < 10000)
{
throw new ArgumentException(
"当前登录用户的ID不能小于10000",
nameof(currentUser));
}
DateTime now = DateTime.Now;
IEnumerable <Yw_SubjectKnowledge> knowledgeEntities =
bll.GetKnowledgesBySubject(subject.Id);
IEnumerable <Yw_SubjectKnowledge> secondaryKnowledgeEntities =
knowledgeEntities.Where(k => !k.Ysw_IsMain);
//前台传过来的次级知识点
IList <int> knowledges = new List <int>();
if (subject.Knowledges.HasValue())
{
knowledges = subject.Knowledges.Split(',').Select(k => int.Parse(k)).ToList();
}
//需要添加的次级知识点
IEnumerable <Yw_SubjectKnowledge> knowledgesToAdd = null;
//需要删除的次级知识点
IEnumerable <int> idsOfknowledgeToDelete = null;
//数据库的次级知识点
var knowledgesInDb =
secondaryKnowledgeEntities.Select(k => k.Ysw_KnowledgeId);
knowledgesToAdd = knowledges.Except(knowledgesInDb)
.Select(k => new Yw_SubjectKnowledge
{
Ysw_KnowledgeId = k,
Ysw_IsMain = false,
Ysw_CreateTime = now,
Ysw_Creator = currentUser,
Ysw_UpdateTime = now,
Ysw_Editor = currentUser
});
var knowledgesToDelete = knowledgesInDb.Except(knowledges);
idsOfknowledgeToDelete =
secondaryKnowledgeEntities
.Where(k => knowledgesToDelete.Contains(k.Ysw_KnowledgeId))
.Select(k => k.Ysw_Id);
toDelete = idsOfknowledgeToDelete;
return(knowledgesToAdd.ToList());
}
public static Action<Yw_SubjectKnowledge> Fetch(
QuestionInputModel subject,
SubjectBll bll,
int currentUser,
out Yw_SubjectKnowledge entity)
{
Check.IfNull(subject, nameof(subject));
Check.IfNull(bll, nameof(bll));
if (currentUser < 10000)
{
throw new ArgumentException(
"当前登录用户的ID不能小于10000",
nameof(currentUser));
}
DateTime now = DateTime.Now;
Action<Yw_SubjectKnowledge> saveKnowledge = null;
IEnumerable<Yw_SubjectKnowledge> knowledgeEntities =
bll.GetKnowledgesBySubject(subject.Id);
Yw_SubjectKnowledge mainKnowledgeEntity =
knowledgeEntities.FirstOrDefault(k => k.Ysw_IsMain);
if (subject.Knowledge == 0)//不在指定主知识点
{
saveKnowledge = bll.DeleteKnowledge;
}
else
{
if (mainKnowledgeEntity == null)
{
mainKnowledgeEntity = new Yw_SubjectKnowledge();
mainKnowledgeEntity.Ysw_IsMain = true;
mainKnowledgeEntity.Ysw_CreateTime = now;
mainKnowledgeEntity.Ysw_Creator = currentUser;
saveKnowledge = bll.InsertMainKnowledge;
}
else
{
mainKnowledgeEntity.EnableAudit();
saveKnowledge = bll.UpdateMainKnowledge;
}
mainKnowledgeEntity.Ysw_Editor = currentUser;
mainKnowledgeEntity.Ysw_KnowledgeId = subject.Knowledge;
mainKnowledgeEntity.Ysw_UpdateTime = now;
}
entity = mainKnowledgeEntity;
return saveKnowledge;
}