Prevent last contact from delete using trigger in salesforce

Question

I have 4 contact in one account and I want to delete the contacts but want 1 contact should not be deleted. Is it possible using trigger?

Can anyone help me with this?

Answer 1

You can have it without using triggers, you can try it by Roll-Up summary that will going to count records, and can able to add a validation rule on account like:

ContactCount__c = 0 &&  PRIORVALUE(ContactCount__c) > 0

I hope this will help.

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