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Mathew Andresen 5Mathew Andresen 5 

Not pulling parent object info as expected

Hi,

My first try of this didn't work, and I did a work around, but I'm really trying to understand why my first try didn't work.  Basically, I'm trying to pull the Account Name from one of' it's child objects.  So, I thought the syntatx should be something like sObject.Account__r.Name
  
trigger TastingEvent on Tasting__c (before insert, before update) {
List<Event> myEvent = new List<Event>();
    User u = [Select id, FirstName from User where id =: UserInfo.getUserId() LIMIT 1];
    for(Tasting__c taste:Trigger.New) {
		String acct = taste.Account__c;
        Account myAccount = [SELECT Name, Id FROM Account WHERE Id = :acct];
        Event e = new Event();
        
        // this doesn't work
        //e.Subject = taste.Account__r.Name;
        
        // but this does
        String subject = (myAccount.Name + ' ' + taste.Location__c) ;
        e.Subject = subject;
        date st = taste.Date_of_Tasting__c;
        DateTime dt_StartDate = datetime.newInstance(st.year(), st.month(), st.day(), 3,0,0);
        e.StartDateTime = dt_StartDate;
        datetime endDate =  dt_StartDate;
        endDate = endDate.addHours(2);
        e.EndDateTime = endDate;
        
       
        
        
        e.OwnerId = u.Id;
        myEvent.add(e);
        System.debug(taste.Account__r.Name);
    }
    insert(myEvent);
}

 
Best Answer chosen by Mathew Andresen 5
sherry pengsherry peng
In sf, you can only use the field value that you have queried in SOQL. Trigger.new only store current objects's value, no parent or children objects value.

All Answers

sherry pengsherry peng
In sf, you can only use the field value that you have queried in SOQL. Trigger.new only store current objects's value, no parent or children objects value.
This was selected as the best answer
Zuinglio Lopes Ribeiro JúniorZuinglio Lopes Ribeiro Júnior
Hello,

There are many ways that you can do to achieve what you are trying but first things first:

1. Jane is right.
2. You definitely should avoid SOQL inside loops, this is highly important! (https://developer.salesforce.com/page/Apex_Code_Best_Practices)

You can try something like the code below, I didn't tested but this is one way. Furthermore, you can add some sort of validation to avoid nulls, etc.
  
trigger TastingEvent on Tasting__c (before insert, before update) {

	List<Event> myEvent = new List<Event>();
    Set<Id> accountsId = new Set<Id>();
	Map<Id, Account> accounts = new Map<Id, Account>();
	
	for (Tasting__c taste: Trigger.New) {
		accountsId.add(taste.Account__c);
	}
	
	Map<Id, Account> accounts =  new Map<Id, Account>([SELECT Id, Name FROM Account WHERE Id = :accountsId]);
	Event e;
	
	for (Tasting__c taste: Trigger.New) {
	
        e = new Event();
        e.Subject = accounts.get(taste.Account__c).Name + ' ' + taste.Location__c;
        e.StartDateTime = taste.Date_of_Tasting__c.addHours(3);
        e.EndDateTime = e.StartDateTime.addHours(2);
        e.OwnerId = UserInfo.getUserId();
		
        myEvent.add(e);
    }
	
	Database.insert(myEvent);
}

Regards

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