小编Kir*_*nik的帖子

我使用 uuid 而不是 bigint 作为主键。和下一次迁移

class CreateProjects < ActiveRecord::Migration[6.0]
  def change
    create_table :projects, id: :uuid do |t|
      t.string :title
      t.references :user, null: false, foreign_key: true
      t.timestamps
    end
  end
end

失败并出现错误：

PG::DatatypeMismatch: ERROR:  foreign key constraint "fk_rails_b872a6760a" cannot be implemented
DETAIL:  Key columns "user_id" and "id" are of incompatible types: bigint and uuid.