ActiveRecord破坏has_many：来自关系表的记录

Question

Logistic＆amp;租赁请求通过TypeLogistic表彼此相关。我不小心创建了一个糟糕的TypeLogistic，所以现在有两个：

TypeLogistic.where(rental_request_id:200).where(logistic_id:130)
=> #<ActiveRecord::Relation [#<TypeLogistic rental_request_id: 200, logistic_id: 130, type_of_logistics: nil>, #<TypeLogistic rental_request_id: 200, logistic_id: 130, type_of_logistics: "delivery">]>

如何销毁第一个？尝试在下面跑，没有用

TypeLogistic.where(rental_request_id:200).where(logistic_id:130).first.destroy
PG::Error: ERROR:  zero-length delimited identifier at or near """"
LINE 1: DELETE FROM "type_logistics" WHERE "type_logistics"."" = $1
                                                            ^

Answer 1

由于TypeLogistic连接表没有主键，因此抛出错误。顺便说一下，这是它出现的默认设置，因为我按照说明创建了连接表而没有改变任何内容。

此处的详细信息：Rails Devise PG::SyntaxError: ERROR: zero-length delimited identifier at or near """"

解决方案？添加主键，请参阅以下答案：

Add Id column in a migration