Hi Everyone, ive got some trouble with the SOQL References.

Error Code:

System.SObjectException: SObject row was retrieved via SOQL without querying the requested field: Order__c.Legs__r Class.PurchaseRequestController.count: line 24, column 33 Class.PurchaseRequestController.getCount: line 4, column 28 External entry point

my syntax: (ive marked the affected lines red)

List<Integer> out = new List<Integer>();

for(Order__c ord : [select Name,Algorithm__c,ExpireDate__c,Legs__c,Slab__c,Screw__c,
Quantity__c from Order__c])
{
Integer quant = (ord.Quantity__c).scale();
out[Integer.valueOf(ord.Legs__r.Id)] += quant;
out[Integer.valueOf(ord.Slab__r.Id)] += quant;
out[Integer.valueOf(ord.Screw__c)] += quant;
}