mysql - “MUL”是可接受的“主键”吗？

Question

我正在尝试使用ActiveUUIDgem 使我的Survey表的主键成为 UUID。(MySQL)

即使我有:primary_key => true它仍然MUL出于某种原因将其设置为？这是预期的吗？

移民：

class CreateSurveys < ActiveRecord::Migration
  def change
    create_table :surveys, :id => false do |t|
      t.references :employee, :null => false

      t.uuid :id, :primary_key => true
      t.datetime :expired_at

      t.timestamps
    end
    add_index :surveys, :id
  end
end

模型：survey.rb

class Survey < ActiveRecord::Base

  include ActiveUUID::UUID

  belongs_to :employee

  validates :employee, :presence => true  

end

Answer 1

我找到了答案。我需要删除add_index :surveys, :id. 显然主键已经被索引。那解决了它