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Mögliche Klausurfragen für Rails Active Record Associations.
Weise die vorhandenen Associations deren Typ zu:
A: belongs_to B: has_one C: has_many D: has_many :through E: has_one :through F: has_and_belongs_to_many
1 - 1:n
2 - n:m
3 - 1:1
A:
B:
C:
D:
E:
F:
Nenne jeweils ein Beispiel für 2 Associations:
Describe the meaning of data migration and how does it work in active records?