How can i write a Salesforce trigger for below given scenario ?

Hi Aman,

You can try this :-

trigger ContactRoleTrigger on Opportunity (after update) {

List opps = [select stagename,(select id from OpportunityContactRoles) from opportunity where id in:Trigger.new];
for(Opportunity opp:opps){
if(opp.OpportunityContactRoles.size() ==0 && opp.StageName=='closed Won'){
opp.addError('error');
}
}
}

Hi,

Here is the code I tried and got success:

trigger opporTrigger on Opportunity (after update) {

List<Opportunity> oppor = [select id, name, description, stagename, (select id, name from OpportunityContactRoles) from opportunity where id in: Trigger.new];
for(Opportunity opp:oppor){
if(opp.OpportunityContactRoles.size() ==0 && opp.StageName==’closed Won’){
opp.addError(‘error’);
}
}
}

Hope this helps you.

Thanks.