Compile Error: Variable does not exist: o.CloseDate

Question

Does anyone have an idea why my trigger doesn't want to save the o.Closedate, only the stagename works fine. but the error I get on closedate is

"variable doesn't exists"

...thanks in advance.

trigger Opportunity_Before_Update on Opportunity (before insert) {

    for(Opportunity o: trigger.new)
        o.Stagename = 'New';
        o.CloseDate = Date.today()+90;
}

Answer 1

If you do not use {} after your for loop, then only the first line after the for loop is within the loop, and the rest of the statements are considered outside of the loop. You need to have the for loop code block within {}so it can find a defined reference to o.

trigger Opportunity_Before_Update on Opportunity (before insert) {
    for(Opportunity o: trigger.new)
    {
        o.Stagename = 'New';
        o.CloseDate = Date.today()+90;
    }
}