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Ram ParitalaRam Paritala 

0 replies i want to insert contact records to account.but i want to insert only one contact to one account. is there any 2 contacts for one account i want to throw an error. can anybody help me on this ?

Manoj Goswami 5Manoj Goswami 5
You can create rolluop summary field on Account object to Count #of child Contact records,
Then put a validation rule on the rollup summary field ,if count > 2 then throw error.

Else you can go with the triggers too, if you are interested in coding. 
Ajay K DubediAjay K Dubedi
Hi Ram,

Below code can fullfill your requirements. Hope this will work for you.

trigger FindDuplicateContact on Contact (before insert) {
 List<id> accId = new List<id>();
  for(contact cc :{
    if(cc.AccountId != null){
 List<contact> ccList = new List<contact> ();
  List<Account> accLst = [select id,(select id from contacts) from account where id IN : accId] ;
for(account accObj : accLst ){
   for(contact c : accObj.contacts){     
 if(ccList.size() > 0 ){
     oCon.addError('you can not add more than one contact for this account'); 

Please mark this as best answer if this solves your problem.

Thank you
Ajay Dubedi