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David OvellaDavid Ovella 

Is it possible to pass some values from a list to a custom field?

I want to know if there's a way to pass the values that are in that list Linea_de_detalle to a custom field  Texto_Largo__c
My custom object is called OT__c and has a "Master RelationShip" with Linea_de_detalle__c
And I need some of the values of that list pass to a field called Texto Largo _c​

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sfdcsushilsfdcsushil
You can write a trigger on child object to derive the values based on logic and populate on parent record. 
Becka DBecka D
Hi David - Are you trying to concatenate all the values from the related list & push them into one single large text field on the OT__c object?