我无法使用BCC通过Laravel中的Mandrill插件向用户发送电子邮件。我可以将电子邮件“发送到”地址，如下所示:Mail::send('emails.coach_invite',$data,function($message)use($coach,$emails){foreach($emailsas$email){$message->to($email);}$message->subject($coach->first_name.''.$coach->last_name.'hasinvitedyoutotryNudge!');});这很好用。但是，如果我尝试密件抄送相同的用户:

我的应用程序在本地运行，但在生产环境中我似乎无法使用mongoose从mongo获取特定内容。我试过:varCoach=mongoose.model('Coach',CoachSchema);Coach.findOne({_id:req.session.userId},function(err,coach){})Coach.find({_id:req.session.userId},function(err,coach){})Coach.findById(req.session.userId).exec(function(err,coach)){})我收到了同样的错误:模型“Coach

Teacher&TeamMate是两个协议(protocol)。Coach类符合这些协议(protocol)。protocolTeacher{varfirstName:String{get}varlastName:String{get}vartitle:String{get}}protocolTeamMate{varfirstName:String{get}funcrole()}classCoach:Teacher,TeamMate{varfirstName:StringvarlastName:Stringvartitle:Stringfuncrole(){print("coachth