I am excited to getPopulatedFieldsAsMap that being released on Summer 16 . I tried to run query however some of field does not return value. I thought it was bug but somehow it should be fixed in Spring 17 because now already Summer 19.

I have some quick testing and find out that if I limit the query, I will able to see the field value. I am not sure if there any documentation on size of fields return limitation.

Here is my sample code :

/**  certain field fail to return value  
quote = [SELECT Id, Name ,Owner.Name,RecordType.Name, Date_Submitted__c , Date_Approved__c , Actual_Final_Approver__c , Primary__c , Status__c,
             Quote_Name__c,Quote_Summary__c ,Discount_Reason__c FROM Quote__c  
             WHERE Id = :ApexPages.currentPage().getParameters().get('quoteId')];

 //this will return value 
 quote = [SELECT Id, Discount_Reason__c FROM Quote__c  
             WHERE Id = :ApexPages.currentPage().getParameters().get('quoteId')];

   mapQuote = quote.getPopulatedFieldsAsMap();        
   system.debug('@@@ map size '+ mapQuote.size());//map size only 20 ??? 

   //this will fail if I used 
   System.assert(mapQuote.ContainsKey('Discount_Reason__c'), 'Discount_Reason test');
   for (String fieldName : mapQuote.keySet()) {
        System.debug('@@@ field name is ' + fieldName + ', value is ' + 

I am using class with version 46.

Thank you


What I feel is Discount_Reason__c would be null and hence it was not part of mapQuote.

I quickly wrote a test class to test this behaviour.

Account a = new Account();
a.name = 'TestMapAccount1';
insert a;
a = [select Id,Name,Type  from Account where id=:a.Id];
Map<String, Object> fieldsToValue = a.getPopulatedFieldsAsMap();

System.assert(fieldsToValue.containsKey('Type') ,'Type is Not populated'); //It broke

Even if I querried Type it was not part of map keys as the value was null.

  • 1
    You're correct - getPopulatedFieldsAsMap() only has a map of populated fields (as the name suggests), and any field that's null will not show up in that map (even if it's included in the SOQL query). I just tested this myself as well – Brian Miller Jul 18 '19 at 12:13
  • Ahh..if that the case how we can compare fieldname in query is match in the query result dynamically. I google around but only find whether we can only get all fieldname from describe object or specifically state field name(i am not expert enough) . I wonder any api that enable to extract field name from soql so we can compare with result? Because currently I plan to put all the fieldname is string then use dynamic apex. – unidha Jul 19 '19 at 2:19

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