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Venkatasainath GadhamsettyVenkatasainath Gadhamsetty 

trigger to convert a lead to contact

Hi everyone,

can anyone help me out in writing a trigger that automatically converts lead into contact.
While converting, I need to check whether lead email exists in existing contacts or not, if exists then I need to update contacts else I need to create a contact.
On lead I have Primary_Program field which is picklist, if it is not null then I need to create a record in Relationship object.
On relationship object, I need to populate the Program__c = Lead.Primary Program and
Contact__c = newly created contact in trigger.
I tried below code. 
trigger ContactCreationFromLead on Lead (After insert) {
    List<Contact> conInsertList = new List<Contact>();
    List<hed__Affiliation__c> affiliation = new List <hed__Affiliation__c>();
    List<hed__Relationship__c> relation = new List<hed__Relationship__c>();
    List<String> listEmail = new List<String>();
    if(trigger.isInsert || trigger.isUpdate){
    for (Lead em : Trigger.new) {
        if(em.Email != null){
            listEmail.add(em.Email);
        }
    }
    }
    
    List<Contact> cem = [SELECT Id, Email FROM Contact WHERE Email = :listEmail];
    String cemail;
    for(Contact ce : cem){
        cemail = ce.Email;
    }
    
    for(Lead ld : Trigger.new) {
        if (ld.Email != cemail && ld.Parent_or_guardian__c == false) {
            
            Contact cnt = new Contact();
            
            cnt.FirstName = ld.FirstName;
            cnt.LastName = ld.LastName;
            cnt.Email = ld.Email;
            cnt.RecordTypeId = '012P00000005ZDpIAM';
            conInsertList.add(cnt);
        }
        else{
            if(ld.Email != cemail && ld.Parent_or_guardian__c == true ){
                Contact cnt1 = new Contact();
                cnt1.RecordType.DeveloperName = '012P00000005ZDuIAM';
                cnt1.FirstName = ld.Parent_First_Name__c;
                cnt1.LastName = ld.Parent_Last_Name__c;
                cnt1.Email = ld.Parent_Email__c;
                conInsertList.add(cnt1);
                Contact cnt2 = new Contact();
                cnt2.RecordType.DeveloperName = '012P00000005ZDpIAM';
                cnt2.FirstName = ld.FirstName;
                cnt2.LastName = ld.LastName;
                cnt2.Email = ld.Email;
                conInsertList.add(cnt2);
            }
        }
    }
    
    if(conInsertList.size()>0){
        INSERT conInsertList;
        List<Id> conInsert = new List<Id>();
        for(Contact con : conInsertList){
            conInsert.add(con.Id);
        }
    }
}

 
Deepali KulshresthaDeepali Kulshrestha
Hi Venkatasainath,

I read your code as you did some mistake in your code Please try the given corrected code as it may help you in solving your problem. 
trigger ContactCreationFromLead on Lead (After insert) {
    List<Contact> conInsertList = new List<Contact>();
    List<hed__Affiliation__c> affiliation = new List <hed__Affiliation__c>();
    List<hed__Relationship__c> relation = new List<hed__Relationship__c>();
    List<String> listEmail = new List<String>();
    if(trigger.isInsert || trigger.isUpdate){
    for (Lead em : Trigger.new) {
        if(em.Email != null){
            listEmail.add(em.Email);
        }
    }
    }
    
    List<Contact> cem = [SELECT Id, Email FROM Contact WHERE Email IN :listEmail];
    List<String> cemail = new List<String>();
    for(Contact ce : cem){
        cemail.add(ce.Email);
    }
    
    for(Lead ld : Trigger.new) {
        if (!cemail.contains(ld.Email) && ld.Parent_or_guardian__c == false) {
            
            Contact cnt = new Contact();
            
            cnt.FirstName = ld.FirstName;
            cnt.LastName = ld.LastName;
            cnt.Email = ld.Email;
            cnt.RecordTypeId = '012P00000005ZDpIAM';
            conInsertList.add(cnt);
        }
        else{
            if(!cemail.contains(ld.Email) && ld.Parent_or_guardian__c == true ){
                Contact cnt1 = new Contact();
                cnt1.RecordType.DeveloperName = '012P00000005ZDuIAM';
                cnt1.FirstName = ld.Parent_First_Name__c;
                cnt1.LastName = ld.Parent_Last_Name__c;
                cnt1.Email = ld.Parent_Email__c;
                conInsertList.add(cnt1);
                Contact cnt2 = new Contact();
                cnt2.RecordType.DeveloperName = '012P00000005ZDpIAM';
                cnt2.FirstName = ld.FirstName;
                cnt2.LastName = ld.LastName;
                cnt2.Email = ld.Email;
                conInsertList.add(cnt2);
            }
        }
    }
    
    if(conInsertList.size()>0){
        INSERT conInsertList;
        List<Id> conInsert = new List<Id>();
        for(Contact con : conInsertList){
            conInsert.add(con.Id);
        }
    }
}


I hope you find the above solution helpful. If it does, please mark as Best Answer to help others too.

Thanks and Regards,
Deepali Kulshrestha