Question

我正在尝试通过迁移添加外键。它可以按预期工作，但是会自动在末尾添加_id（我要引用的列名不包括_id）。我如何赋予它引用列名的权限？

这是迁移

class ChangeRefOnMemberPresentations < ActiveRecord::Migration[5.2]
  def change
    add_reference :member_presentations, 'employee_number', foreign_key: { to_table: :users }
  end
end

这会导致在schema.rb中引用列名称和外键引用列都被称为employee_number_id

Answer 1

以下内容通过手动定义所有内容而起作用，但看起来很杂乱。如果有更好的迁移答案，我会很乐意接受。

def change
  # column was added in another migration, but including for completness
  add_column :member_presentations, :employee_number, :bigint
  add_index :member_presentations, :employee_number, name: "index_member_presentations_on_employee_number"
  add_foreign_key :member_presentations, :users, column: "employee_number"
end

从外键迁移中删除_id后缀

1 个答案: