node.js - How to properly debug the response lifecyle in Sails.js? -

using sails.js got these controller methods perform db requests , use promises. problem they're working when request performed 504 obtained @ client side.

i want make sure implementation , 504 not problem in sails/node coding nginx or else. set log mode silly in config/logs.js can't see everytime response.send invoked.

both methods bellow present such issue (maybe coincidence) first method happening sometimes.

method 1

addplayer: function (request,response) {  console.log("add player"); var lineupid = request.params.id;  var receivedplayer = request.param('player'); var playerid = receivedplayer.id; var bench = receivedplayer.bench; var place = receivedplayer.place;  lineup.findone().where({id: lineupid}).then(function (foundlineup) {    var player = player.findone().where({id: playerid}).then(function (player) {     console.log("found player _id " + player.id);     return player;   });    return [foundlineup,player];    }).spread(function (lineup,player) {      if (!lineup)       return response.send(404);      if (!player)       return response.send(409, "el jugador " + playerid + " no existe");      else if (!lineup.formation)       return response.send(409, "no se ha elegido una táctica para esta alineación");      if (lineup.squadiscomplete())       return response.send(409, "la plantilla ya contiene el máximo de 15 jugadores");      if (lineup.playerwasadded(player.id))       return response.send(409, "el jugador ya ha sido agregado la alineación");      if (lineup.fieldiscomplete() && !bench)       response.send(409, "ya se han agregado los 11 jugadores de campo");      /*if there's player same position, return 409, should modify*/      player.bench = bench;     player.place = place;      lineup.players.push(player);      /*         missing: add field or bench player , rearrange squad     */      // if of rule restrictions evaluates true ...     // using lodash _.some out second argument defaults _.identity     if ( _.some([ lineup.reachesmaxforeignplayers(),                   lineup.reachesbudgetlimit(),                   lineup.reachesmaxsameteamlimit(),                   lineup.reachesmaxsamefavoriteteamlimit()]) ) {        response.send(400, "la inclusión de este jugador no satisface las reglas del juego");     }      // whole rule validations passed through     else {       lineup.save().then(function (saved) {          // pluck missing, valid while dev         return response.send(202,json.stringify(saved));       });     }   }).   catch(function (err) {      console.log(err);     response.send(500,json.stringify(err));   })  } 

method 2

deleteplayer: function (request,response) {    console.log("deleteplayer");    var lineupid = request.param('id');   var playerid = request.param('player');    lineup.findone().where({id: lineupid}).then(function (foundlineup) {     _.remove(foundlineup.players, function(player) {       console.log(player.id + " || " + playerid);       return player.id === playerid;     });      console.log("ended remove");      foundlineup.save().then(function (savedlineup) {        console.log("saved lineup\n\n:" + json.stringify(savedlineup));       return response.send(202, json.stringify(savedlineup));     }).catch(function (err) {        console.log("save lineup err");       response.send(500, json.stringify(err));     });   }).catch(function (err) {     console.log(err);     return response.send(500, json.stringify(err));   }); } 

i think timeout because you're not returning resolved in promise:

addplayer: function(request, response) {        console.log("add player");      var lineupid = request.params.id;        var receivedplayer = request.param('player');      var playerid = receivedplayer.id;      var bench = receivedplayer.bench;      var place = receivedplayer.place;        return lineup.findone().where({          id: lineupid      }).then(function(foundlineup) {                    return player.findone().where({              id: playerid          }).then(function(player) {              console.log("found player _id " + player.id);              return [foundlineup, player];          });        }).spread(function(lineup, player) {            if (!lineup)              return response.send(404);            if (!player)              return response.send(409, "el jugador " + playerid + " no existe");            else if (!lineup.formation)              return response.send(409, "no se ha elegido una táctica para esta alineación");            if (lineup.squadiscomplete())              return response.send(409, "la plantilla ya contiene el máximo de 15 jugadores");            if (lineup.playerwasadded(player.id))              return response.send(409, "el jugador ya ha sido agregado la alineación");            if (lineup.fieldiscomplete() && !bench)              response.send(409, "ya se han agregado los 11 jugadores de campo");            /*if there's player same position, return 409, should modify*/            player.bench = bench;          player.place = place;            lineup.players.push(player);            /*              missing: add field or bench player , rearrange squad          */            // if of rule restrictions evaluates true ...          // using lodash _.some out second argument defaults _.identity          if (_.some([lineup.reachesmaxforeignplayers(),                  lineup.reachesbudgetlimit(),                  lineup.reachesmaxsameteamlimit(),                  lineup.reachesmaxsamefavoriteteamlimit()              ])) {                response.send(400, "la inclusión de este jugador no satisface las reglas del juego");          }            // whole rule validations passed through          else {              lineup.save().then(function(saved) {                    // pluck missing, valid while dev                  return response.send(202, json.stringify(saved));              });          }      }).      catch(function(err) {            console.log(err);          response.send(500, json.stringify(err));      })    }