Unable to store resolve data of promise in a variable in nodejs

Question

I am using nodejs for creating REST apis and wanted to store resolved data from multiple promises in to single variable.

Sample code :

var resultset={};

function getAllTeams()
{
     return M.savelatlong(data)
          .then(function(result){  return M.getTeam(id); })
          .then(function(teams){  return teams;})
          .catch(function(error){res.json({status:'success',type:false,msg:error.code});});
}



getAllTeams().then(function(result){
    console.log(result);  // This prints data
    resultset.data=result;
});

console.log(resultset); // Always empty
res.json({status:'success',type:true,data:resultset});

But my resultset variable is always empty.Am I am doing it in a right way or is there any other way to do it.

I tried one solution that is sending response with then statement which works so does that mean I have to always send response within then statements

getAllTeams().then(function(result){
    res.json({status:'success',type:true,data:result});
});

score 0 · Answer 1 · answered Nov 25 '16 at 14:46

0

You need to put this

console.log(resultset); // Always empty res.json({status:'success',type:true,data:resultset});

inside

getAllTeams().then(function(result){ console.log(result); // This prints data resultset.data=result; });

Your response are being sent before promise resolves. That's the issue.

Hope this helps.

answered Nov 25 '16 at 14:46

Mykola Borysyuk

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Yes that's why I have edited my question.But is that the only way to do ? – Vibhas Nov 25 '16 at 14:49
There is a lot of ways. But in your code yep it is. Read similar question. This will helps you understand how async operations works. – Mykola Borysyuk Nov 25 '16 at 14:51

Unable to store resolve data of promise in a variable in nodejs

1 Answers1