Loan.js

adv: {
        findOne: function(args){
            return Loan.findOne(args)
                .populate('broker')
                .populate('borrower')
                .populate('createdBy')
                .populate('updatedBy')

                .populate('notes')
                .populate('investors')
                .populate('documents')
                .populate('transactions')
                .populate('schedule')
                .then(function(loan){
                    var industry = Meta.findOne({value: loan.industry, key: 'industry'});
                    return [loan, industry];
                })
                .spread(function(loan, industry){
                    loan.industry = industry;
                    return loan;
                })
                .then( function(loan){
                    console.log('Loan Investors', Object.keys(_.indexBy(loan.investors, 'id')));
                    var investors = LoanInvestor.adv.find(Object.keys(_.indexBy(loan.investors, 'id')))
                        .then(function(result){
                            return result;
                        });
                    
                    return [loan, investors];
                })
                .spread( function(loan, investors){
                    loan.investors = investors;
                    return loan;
                })
                .then( function(loan){
                    var notes = LoanNote.adv.find({id: Object.keys(_.indexBy(loan.notes, 'id'))})
                        .then( function(result){
                            return result;
                        });
                    return [loan, notes];
                })
                .spread( function(loan, notes){
                    loan.notes = notes;
                    return loan;
                })
                .then( function(loan){                    
                    console.log('Loan End Investors');
                    console.log(loan.investors);
                    console.log('Loan End');
                    console.log(loan);
                    
                    return loan;
                })
                .catch( function(err){
                    DebugError('Loan.js adv.findOne', err);
                });
        },
}

LoanInvestor.js

adv: {
        find: function(args){
            return LoanInvestor.find(args)
                 .populate('user')
                 .populate('loan')
                 .populate('schedule')
                 .then(function(investors) {
                    var promises = [];
                    _.forEach(investors, function(investor, index) {
                        var schedule = LoanInvestorSchedule.adv.find({loanInvestor:  investor.id}, function(){
                            investor.schedule = result;
                        });
                        promises.push(schedule);
                    });
                     return [investors, Promise.all(promises)];
                 })
                 .spread(function(investors, schedule) {
                     return investors;
                 });
        },
}

LoanInvestorSchedule.js

adv: {
        find: function(args){
            return LoanInvestorSchedule.find(args)
                .populate('loanInvestor');
        },
}