Validation Rule based on Trigger

Question

I have validation rule need to be implemented by validation rule.

Issue object is child object of Case in Master Detail Relationship. If Primary Issue(Checkbox) is checked then Status in Case record cannot be changed to "Closed" and this case with Specific Record Type this trigger should work.

Even the system.debug is not working mentioned in trigger

Please help me out with this one.

I have pasted my code below guys please let me know any error in code.

trigger Cares_Case on Case (before insert, before update) {
    if (Trigger.isBefore){
        if(Trigger.isInsert && Trigger.isUpdate){
            WM_Cares_Trigger_Handler.CaseClosedPrimaryCheckValidaionrule(Trigger.new);
            System.debug('Cares Trigger done');
        }
    }
}

public class Cares_Trigger_Handler {
    public static void CaseClosedPrimaryCheckValidaionrule(List<Case> newcaselist){
        for(Case triggeredcase :newcaselist){
            if(triggeredcase.Status == 'Closed' && triggeredcase.RecordType.DeveloperName == 'Cares'){
                if(triggeredcase.Issue__r.Primary_Issue__c = true){
                    triggeredcase.addError('Case not closed If Primary Issue is checked');  
                }
            }
        }
    }
}

Answer 1

In Your trigger you are adding condition with AND(&&) Operator which can't possible.

Same record can't be in Trigger.isInsert && Trigger.isUpdate and it should be Trigger.isInsert || Trigger.isUpdate.

trigger Cares_Case on Case (before insert, before update) {
    if (Trigger.isBefore){
        if(Trigger.isInsert || Trigger.isUpdate){
            WM_Cares_Trigger_Handler.CaseClosedPrimaryCheckValidaionrule(Trigger.new);
            System.debug('Cares Trigger done');
        }
    }
}