I have the JSON string below that is being sent to a Salesforce Webservice:


I serialize the request into a Map and am trying to get the Date field value but get an error from Apex when trying to send from Postman: '?

System.TypeException: Invalid date: 2019-11-22

I've tried date.valueof and casting using (date) but no luck with either. Not sure why the below code will not work (all other field types work fine):

RestRequest req = RestContext.request;
String requestBody = req.requestBody.toString();
Map<String, Object> oppMap = (Map<String, Object>)JSON.deserializeUntyped(requestBody);

Opportunity o = new Opportunity();

if ((Object)oppMap.get('Appraisal_Date__c') != null) { 
    o.Appraisal_Date__c = Date.valueof(oppMap.get('Appraisal_Date__c'));
  • What's your user's locale? Try using Date.parse instead of Date.valueOf - just keep in mind locale restrictions Nov 11, 2019 at 23:08
  • Time Zone (GMT-05:00) Eastern Standard Time (America/New_York) Locale English (United States) Tried 'o.Appraisal_Date__c = Date.parse(oppMap.get('Appraisal_Date__c'));' but got the error 'Method does not exist or incorrect signature: void parse(Object) from the type Date'
    – Al K
    Nov 11, 2019 at 23:17

2 Answers 2


You are not casting the object returned by (Map)JSON.deserializeUntyped(requestBody). Change to the following:

o.Appraisal_Date__c = Date.parse((String)oppMap.get('Appraisal_Date__c'));
  • That did it, thanks so much Glen!
    – Al K
    Nov 11, 2019 at 23:27

You could just do:

RestRequest req = RestContext.request;
String requestBody = req.requestBody.toString();
Opportunity o = (Opportunity) JSON.deserialize(requestBody,Opportunity.class);
  • Thanks, I'll try that out.
    – Al K
    Nov 11, 2019 at 23:33

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