Grant Field Permissions

Grant one or more permission sets read and edit access to one or more custom fields. Granting access a permission set already has is not an error — it is reported as unchanged. A field created for a line attribute is copied onto several objects, and each copy carries its own field-level security, so making one attribute usable normally means granting access on every object the field was created on. Not every field can carry field-level security: required, master-detail, autonumber and formula fields are visible to anyone who can see the object. Such a field is reported in errors and the remaining fields are still granted, so check success and results rather than assuming the whole request applied.