how to get a key value from Json object in node js

Question

I want to get the id value from the following json object

 answerTag: 
 [ '[{"id":64,"name":"Coronary Artery Disease"}]',
 '[{"id":64,"name":"Coronary Artery Disease"}]' ],
 risk: '1' }

Answer 1

I had the same issue. I found that I had to remove the leading and trailing brackets before calling JSON.parse for it to work. The JSON.parse inside a try-catch didn't fail but just the same I couldn't access the values in the resultant object.

Here's the excerpt. "rows[0]" is the the first row of my MySQL result array

result = JSON.stringify(rows[0])
result = result.replace(/(^\[)/, '');
result = result.replace(/(\]$)/, '');
try {
 var resultObj = JSON.parse(result);
} catch (e) {
 console.log("Error, not a valid JSON string");
}
var my_value = resultObj["my_key"];

Hope this helps!

Answer 2

You dont have a valid JSON
as a valid json should have a key-value pair

var answerTag= 
{
 "key1":{"id":64,"name":"Coronary Artery Disease"},
 "key2":{"id":64,"name":"Coronary Artery Disease"},
 "key3":{risk: '1' }
}

So if u want to traverse that ,put it in for loop like this

getKeyValueFromJSON(answerTag);
function getKeyValueFromJSON(
 for(var key in obj) {
 alert("Key: " + key + " value: " + obj[key]);
 }
}

Or if i am able to get it The formed JSON is like this

var obj={ 
 answerTag: [
 '[{"id":64,"name":"Coronary Artery Disease"}]',
 '[{"id":64,"name":"Coronary Artery Disease"}]' ],
 risk: '1'
}

So You can use it like this

for(var key in obj) {
 for(var innerKey in obj[key]) {
 console.log("Key: " + innerKey + " value: " + obj[key][innerKey]);
 } 
}