Hello how to use group by in mongoose i have tried this but it displays
undefined
Model.find({}, [], {'group': 'FIELD'}, function(err, logs) {
// code
});
MessageModel.find({'messageTo':userName, "deliveredStatus":false}, {'group':
'messageFrom'}, (function (err, MessageModel) {
var returnData;
if(err){
return cb(err.message);
} else
{
cb(null, chatMessageModel);
}
cb(null, returnData);
}));
any one please help me out
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