📜  PG::ForeignKeyViolation: 错误:更新或删除表违反外键约束 - SQL 代码示例

📅  最后修改于: 2022-03-11 15:05:09.643000             🧑  作者: Mango

代码示例1
has_many :comments, dependent: :delete_all - just automatically delete them when the user is deleted

has_many :comments, dependent: :destroy - like above, but call #destroy on each comment instead of just deleting directly in the db

has_many :comments, dependent: :nullify - don't delete comments when the user is deleted, just null out their user_id column