relations: User: foreignAlias: Phonenumbers local: user_id foreign: id type: one foreignType: many
- Did you forget to define the user_id field in the Phonenumber table?
- Did you check the type of the user_id field and the Phonenumber table's id field? They must be exactly the same integer. If one of them is int(4) and the other is int(8), the building will fail.