开发过程中遇到的问题,解决方案,知识点的记录
b、dotnet aspnet-codegenerator controller -name TeacherLession -actions -outDir Areas/SystemAdmin/Controllers
lessions.GroupBy(g => new { g.subject_id, g.class_id, g.teacher_id })
.SelectMany(s =>s.Select((j, i) => new { j.teacher_id, j.teacher_name, rn = i + 1 })).Where(p => p.rn == 1).ToList();
db.getCollection('ErrorLog').find({$and:[{"logTime":{$gte:ISODate("2019-12-10")}},{"ex":/韬/}]})