当我使用Ruby添加记录时，数据库中的主键是32个字节的空格

Question

This is the code I use to add a record to database:

 def vis_attribute(email){
   :v_uid => 'default_visitor',
   :v_name => 'default_visitor',
   :password_expiration=>(Time.now + 60 * 60 * 24),
   :last_used_timestamp=>(Time.now - 60 * 60 * 24),
   :v_login_id => email,
   :v_password => 'MMM',
 }

 class vis < ActiveRecord::Base
  def add
    @vis = create vis_attribute('AAABBB@MAI.COM')
  end
 end

v_uid is the primary key.

The field @vis.v_id is 0 after I run that.

I'm running MySQL version 5.6.22-enterprise-commercial-advanced MySQL Enterprise.

My Gemfile is:

gem 'activerecord', '~> 3.0'
gem 'mysql', '2.9.1'

the v_id definition in database v_uid | varchar(32) | NO | PRI | NULL | | v_uid | varchar(32) | NO | PRI | NULL | | Does anyone know the reason for this?

Answer 1

I think the ActiveRecord 3 do some magic.

I solve the problem as follows.

def add
    @vis = new vis_attribute('AAABBB@MAI.COM')
    @vis.v_uid="default_visitor"
    @vis.save!
  end

no matter you set self.primary_key = :visitor_uid or not, the new method will ignore the primary key.

Anyone knows why the method new in ActiveRecord do like this.