Hi!

is there a tutorial on inheritance of many-to-many relations work?
Assume the following schema. How can I get all Users that participate
on a Video?

Production:
  columns:
    title: string(255)
  relations:
    Participants:
      class:        User
      local:        user_id
      foreign:      production_id
      refClass:     UserProduction
      foreignAlias: Productions
      onDelete:     SET NULL

UserProduction:
  columns:
    user_id: { type: integer, primary: true }
    production_id: { type: integer, primary: true }

Video:
  inheritance:
    extends:  Production
    type:     concrete
  columns
    video: string(255)

Audio:
  inheritance:
    extends:  Production
    type:     concrete
  columns:
    res: string(50)

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