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Bhagya Hii!Can someone help me with this REST API callout which is getting error like "System.NullPointerException: Attempt to de-reference a null object"
CLASS:
public class Currencyconverter {
public static decimal CurrencyconverterfromEUROtoINR(decimal eur){
decimal inr = 0.0;
HTTP http = new HTTP();
HTTPRequest req= new HTTPRequest();
req.setEndpoint('https://api.exchangeratesapi.io/latest');
req.setMethod('GET');
HTTPResponse res = http.send(req);
Map <string,object> Jsonbody=(Map <string,object>)Json.deserializeUntyped(res.getBody());
system.debug(Jsonbody);
Map <string,object> rates=(Map<string,object>)Jsonbody.get('rates');
decimal conversionrate= (decimal)rates.get('INR');
inr = eur * conversionrate;
return inr;
}
}
Testing at anonymous window:
decimal conversionrate = Currencyconverter.CurrencyconverterfromEUROtoINR(150);
system.debug('conversionrate'+conversionrate);
ERROR:
System.NullPointerException: Attempt to de-reference a null object
public class Currencyconverter {
public static decimal CurrencyconverterfromEUROtoINR(decimal eur){
decimal inr = 0.0;
HTTP http = new HTTP();
HTTPRequest req= new HTTPRequest();
req.setEndpoint('https://api.exchangeratesapi.io/latest');
req.setMethod('GET');
HTTPResponse res = http.send(req);
Map <string,object> Jsonbody=(Map <string,object>)Json.deserializeUntyped(res.getBody());
system.debug(Jsonbody);
Map <string,object> rates=(Map<string,object>)Jsonbody.get('rates');
decimal conversionrate= (decimal)rates.get('INR');
inr = eur * conversionrate;
return inr;
}
}
Testing at anonymous window:
decimal conversionrate = Currencyconverter.CurrencyconverterfromEUROtoINR(150);
system.debug('conversionrate'+conversionrate);
ERROR:
System.NullPointerException: Attempt to de-reference a null object
You are missing the missing the API access_key in endpoit url it's mandatory to get the exchange rate.
Please follow the below steps:
1. Change the Endpoint URL : ( The below access key is dummy)
http://api.exchangeratesapi.io/v1/latest?access_key=23324237856784748&format=1
2. Create your free access key in https://exchangeratesapi.io/
https://exchangeratesapi.io/pricing/
3. Updatet the remote site end point in your salesforce org as below (setup -> Remote Site Settings):
https://api.exchangeratesapi.io
4. Please use the below exchangeratesapi documentation also.
https://exchangeratesapi.io/documentation/
https://manage.exchangeratesapi.io/quickstart --- (login the exchangeratesapi in website)
public class Currencyconverter { public static decimal CurrencyconverterfromEUROtoINR(decimal eur){ decimal inr = 0.0; HTTP http = new HTTP(); HTTPRequest req= new HTTPRequest(); req.setEndpoint('http://api.exchangeratesapi.io/v1/latest?access_key=23324237856784748&format=1'); req.setMethod('GET'); HTTPResponse res = http.send(req); Map <string,object> Jsonbody=(Map <string,object>)Json.deserializeUntyped(res.getBody()); system.debug(Jsonbody); Map <string,object> rates=(Map<string,object>)Jsonbody.get('rates'); decimal conversionrate= (decimal)rates.get('INR'); inr = eur * conversionrate; return inr; } }Thanks,
Maharajan.C
All Answers
Debug the error by following below steps -
* use debug log to check the data in res.getBody()
* see if the Jsonbody contains 'rates' as one of the keys
* see if the inner JSON fr rates, if available, has 'INR' as one of the keys.
You are missing the missing the API access_key in endpoit url it's mandatory to get the exchange rate.
Please follow the below steps:
1. Change the Endpoint URL : ( The below access key is dummy)
http://api.exchangeratesapi.io/v1/latest?access_key=23324237856784748&format=1
2. Create your free access key in https://exchangeratesapi.io/
https://exchangeratesapi.io/pricing/
3. Updatet the remote site end point in your salesforce org as below (setup -> Remote Site Settings):
https://api.exchangeratesapi.io
4. Please use the below exchangeratesapi documentation also.
https://exchangeratesapi.io/documentation/
https://manage.exchangeratesapi.io/quickstart --- (login the exchangeratesapi in website)
public class Currencyconverter { public static decimal CurrencyconverterfromEUROtoINR(decimal eur){ decimal inr = 0.0; HTTP http = new HTTP(); HTTPRequest req= new HTTPRequest(); req.setEndpoint('http://api.exchangeratesapi.io/v1/latest?access_key=23324237856784748&format=1'); req.setMethod('GET'); HTTPResponse res = http.send(req); Map <string,object> Jsonbody=(Map <string,object>)Json.deserializeUntyped(res.getBody()); system.debug(Jsonbody); Map <string,object> rates=(Map<string,object>)Jsonbody.get('rates'); decimal conversionrate= (decimal)rates.get('INR'); inr = eur * conversionrate; return inr; } }Thanks,
Maharajan.C
I'm getting the same error "System.NullPointerException: Attempt to de-reference a null object" after updating endpoint url and API access_key while testing in anonymous window.pls help me with this.
public class Currencyconverter {
public static decimal CurrencyconverterfromEUROtoINR(decimal eur){
decimal inr = 0.0;
HTTP http = new HTTP();
HTTPRequest req= new HTTPRequest();
req.setEndpoint('http://api.exchangeratesapi.io/v1/YYYY-MM-DD');
req.setMethod('GET');
HTTPResponse res = http.send(req);
Map <string,object> Jsonbody=(Map <string,object>)Json.deserializeUntyped(res.getBody());
system.debug(Jsonbody);
Map <string,object> rates=(Map<string,object>)Jsonbody.get('rates');
decimal conversionrate= (decimal)rates.get('INR');
inr = eur * conversionrate;
return inr;
}
}
-------------and in anonymous window--------------------
decimal conversionrate = Currencyconverter.CurrencyconverterfromEUROtoINR(150);
system.debug('conversionrate'+conversionrate);
Thanks for the information about the accsess key.
I have used my access code in below:
Just try the below code without change anything:
public class Currencyconverter { public static decimal CurrencyconverterfromEUROtoINR(decimal eur){ decimal inr = 0.0; HTTP http = new HTTP(); HTTPRequest req= new HTTPRequest(); req.setEndpoint('http://api.exchangeratesapi.io/v1/latest?access_key=56f8c53669c648dc2916360bff5cceed&format=1'); req.setMethod('GET'); HTTPResponse res = http.send(req); Map <string,object> Jsonbody=(Map <string,object>)Json.deserializeUntyped(res.getBody()); system.debug(Jsonbody); Map <string,object> rates=(Map<string,object>)Jsonbody.get('rates'); decimal conversionrate= (decimal)rates.get('INR'); inr = eur * conversionrate; return inr; } }Thanks,
Maharajan.C