Cant read property 'get' of undefined in nodejs-CodePudding

I am using Neo4j for the first time with nodejs and developing an application. I am getting the following error. I tried my best. Can you please help me with this error? Error

(node:16148) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'get' of 
undefined
at E:\fyps\app.js:120:33
at processTicksAndRejections (internal/process/task_queues.js:93:5)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:16148) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error 
originated either by throwing inside of an async function without a catch block, or by 
rejecting a promise which was not handled with .catch(). To terminate the node process 
on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see 
https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:16148) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. 
In the future, promise rejections that are not handled will terminate the Node.js 
process with 
a non-zero exit code.

code

   app.get('/person/:id',function(req,res){
   var id = req.params.id;
   session
   .run("MATCH (a:Person) WHERE id(a)=$idParam RETURN a.name as name", {idParam: id})
   .then(function(result){
     var name =result.records[0].get("name");

session
.run("OPTIONAL MATCH (a:Person)- [r:BORN_in]-(b:location) where id(a)=$idParam RETURN b.city as city, b.state as state" , {idParam:id})
.then(function(result2){
  var city =result2.records[0].get("city");
  var state =result2.records[0].get("state");

  session
  .run("OPTIONAL MATCH (a:Person)-[r:FRIENDS]-(b:Person) WHERE id(a)=$idParam RETURN b", {idParam:id})
  .then(function(result3){
   var friendsArr =[];

     result3.records.forEach(function(record){
      if(record._fields[0] != null){
        friendsArr.push({
          id: record._fields[0].identity.low,
          name: record._fields[0].properties.name
        });
      }
     })
     res.render('person',{
      id:id,
      name:name,
      city:city,
      state:state,
      friends:friendsArr
     })
     session.close();
  })
  .catch(function(error){
    console.log(error);
  })

can you please help me that how to solve this error.. Thanks

CodePudding user response：

The error message clearly says that you are calling the get function on some entity that is undefined, and that has happened within a Promise. So, the error statement can be any one of these:

var name =result.records[0].get("name");
var city =result2.records[0].get("city");
var state =result2.records[0].get("state");

Add some relevant log statements to check which one is causing the issue.