node.js - Maintaining history of model updates in SailsJS -

what efficient approach maintaining data history models in sails? instance, how maintain data if user updates database , we'd keep versions reverting data updates.

i've seen numerous examples of using "changes" tag keeps date sub-tag. efficient?

on model update can copy previous information. there better suggestions or links examples?

{    text:"this latest paragraph",    changes:{       text:{           "1470685677694":"this paragraph",           "1470685577694":"this original paragraph"       }    } } 

i hoping find solution find / search , optimize data allow user revert if necessary.

you can define model following , can preserve history can use restore previous values.

api/models/test.js

module.exports = {   connectionname:"somemongodbserver",   tablename:"test",   autocreatedat:false,   autoupdatedat:false,   autopk:false,   attributes: {     id:{       type:"integer",       primarykey:true,       autoincrement:true     },     name:"string",     history:{       type:'json',       defaultsto:[]     }   },   beforecreate:function(value,cb){     test.count().exec(function (err, cnt) {       if(err)         return cb(err);       value.id = cnt + 1;       cb();     });   },   beforeupdate:function(values,cb){     test.native(function(err,collection){       if(err)         return cb(err);       collection.findone({_id:values.id},{history:0,_id:0},function(err,data){         if(err)           return cb(err);         collection.updateone({_id:values.id},{$push:{history:data}},function(err,res){           if(err)             return cb(err);           console.log(res);           cb();         });       })     });   } };