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sobroachsobroach 

Comparing changed fields on an sobject using Schema.describe

HI, 

 

I'm trying to iterate through all sobject (opportunity) fields and see which ones changed against my trigger map.  

 

Currently 's' is an incompatible key type Schema.SObjectField for MAP<Id, Opportunity>. Any help?

 

fyi Map<Id, Opportunity> newMap = Trigger.newMap()


for(Opportunity o: newMap.values())
{
   for(Schema.Sobjectfield s: SObject.describe('Opportunity'))
   {	
	if(newMap.get(o.Id).s != oldMap.get(o.Id).s)
	{
	   //do stuff in a different class
	}
    }
}

 

Have already been referencing http://www.salesforce.com/us/developer/docs/apexcode/Content/apex_dynamic_describe_objects_understanding.htm

http://www.salesforce.com/us/developer/docs/apexcode/index_Left.htm#CSHID=apex_methods_system_fields_describe.htm|StartTopic=Content%2Fapex_methods_system_fields_describe.htm|SkinName=webhelp

http://www.salesforce.com/us/developer/docs/apexcode/salesforce_apex_language_reference.pdf

Best Answer chosen by Admin (Salesforce Developers) 
sfdcfoxsfdcfox
Map<String,SObjectField> fields = trigger.newmap.getsobjecttype().getdescribe().fields.getmap();
for(opportunity record:trigger.new) {
  for(sobjectfield field:fields.values()) {
    if(record.get(field) != trigger.oldmap.get(record.id).get(field)) {
      // There was a change, process.
    }
  }
}

You have to use SObject.get(SObjectField) for a comparison.

All Answers

sfdcfoxsfdcfox
Map<String,SObjectField> fields = trigger.newmap.getsobjecttype().getdescribe().fields.getmap();
for(opportunity record:trigger.new) {
  for(sobjectfield field:fields.values()) {
    if(record.get(field) != trigger.oldmap.get(record.id).get(field)) {
      // There was a change, process.
    }
  }
}

You have to use SObject.get(SObjectField) for a comparison.

This was selected as the best answer
sobroachsobroach

That was super helpful! Thank you!