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rajmull Triggers:consisting of insert,update,delete on two objects.
hi,
I have 2 objects Employee and Department. Fields are..................
Employee department
----------- ---------------
empname: deptname
dept(lookup) no_of_employees
No of employees should be reflected for each insert,update,delete.
There are 3 cases in this...
1. If i add employee and department(lookup) in Employee object......No of Employee should be increased...N
2. if i delete an employee of a particular department...it should less 1 from No of Employee..
3 If i update employee department to another department...it should be reflected on both the departments...ie.-1from current department...and +1 to the updated department..
Thank you
Most simple way: change the lookup to a master/detail, and add a rollup summary. If you do this, though, deleteing a department will delete all its employees - probably not what you want.
Next most simple way: fire a trigger every time an employee is updated, inserted, deleted or undeleted, and have it update all the departments, like this:
department__c[] depts = [select id, employees__r from department__c]; for (department__c dept : depts) { dept.number_of_employees__c = dept.employees__r.size(); } update deptsSlightly more complex, but more optimized, ways - In the trigger, get the department Id's of all the new/changed/deleted employees and run the above code just on them.