Hi, I am absolutely not an Apex expert, and my issue cannot be resolved by the Salesfoce Standard. So if you could help me, it would be great!

I would like to get field update (for example "Contract_Type__c") on parent standard object "Contact" with a field ("Contract_Type_Bis") from the last record on a child custom object "Contract". The link between these 2 objects is only a look-up relationship. I can't use the master detaill relationship because i already used it 2 times with Contacts object.

I tried to use an Apex code from an another threat here : http://salesforce.stackexchange.com/a/23566

But it wasn't worked, and I didnt understand very well the logic.

Thanks again!