[英]Filling table with values during migration doesn't work completely
My Users table being quite big, I decided to migrate user profile information to a separate table: Profiles . 我的用户表很大,我决定将用户个人资料信息迁移到一个单独的表: 个人档案 。 So Users table will only have access information (using Devise gem). 因此, Users表将仅具有访问信息(使用Devise gem)。 A Profile can have many user accesses. 配置文件可以具有许多用户访问权限。
To do so, I created a migration file to write new data in Profiles table, from Users table: 为此,我创建了一个迁移文件,以从Users表中的Profiles表中写入新数据:
class MigrateSomeUsersInfoToProfilesTable < ActiveRecord::Migration
def up
puts "Pulling out profile information from Users table. Can take a while..."
puts "Start migrating #{User.count} users to `Profiles` table (#{Profile.count} profiles already created)..."
User.all.each do |u|
profile = Profile.new({
first_name: u.first_name,
last_name: u.last_name,
picture: u.picture,
zipcode: u.zipcode,
bio: u.bio,
address: u.address,
latitude: u.latitude,
longitude: u.longitude,
gender: u.gender
})
if profile.save!
u.profile_id = profile.id
u.save!
else
puts "ERROR CREATING PROFILE FOR USER #ID #{u.id}"
end
puts "CREATED PROFILE ##{profile.id} FOR USER ##{u.id}"
end
end
def down
Profile.delete_all
end
end
The result is that all profiles were created (the same number as users) and correcly filled. 结果是创建了所有概要文件(与用户数量相同)并正确填写。 But, the profile_id
is nil
for all users. 但是, profile_id
对所有用户均为nil
。 This means that the line u.profile_id = profile.id
isn't correctly executed. 这意味着未正确执行u.profile_id = profile.id
行。
The only log messages I get are those specified in the migration file (no error or warning messages). 我获得的唯一日志消息是在迁移文件中指定的日志消息(无错误或警告消息)。
Is there something I missed in the code bellow? 我在代码箱中错过了什么吗? Thanks. 谢谢。
UPDATE 更新
From rails console
I get: 从rails console
我得到:
User.count
=> 2182
Profile.count
=> 2182
User.where("profile_id IS NULL").count
=> 2182
UPDATE 2 更新2
In the app, a real user (defined by the information in Profiles table) can access the app using many emails (personnal, professional,...). 在应用程序中,真实用户(由“个人档案”表中的信息定义)可以使用许多电子邮件(个人,专业,...)来访问应用程序。 In this case, the models are like the following: 在这种情况下,模型如下所示:
class User < ActiveRecord::Base
belongs_to :profile
end
class Profile < ActiveRecord::Base
has_many :users
end
That's why, there is a profile_id
in the Users table (attribute that is not updated during the migration??) 这就是为什么在Users表中有一个profile_id
(在迁移过程中未更新的属性?)
I think you should use user_id
not profile_id
if you use the following association: 我认为如果使用以下关联,则应使用user_id
而不是profile_id
:
class Profile < ActiveRecord::Base
belongs_to :user
end
class User < ActiveRecord::Base
has_one :profile
end
# tables
"profiles"
id: integer
user_id: integer
"users"
id: integer
http://guides.rubyonrails.org/association_basics.html#the-belongs-to-association http://guides.rubyonrails.org/association_basics.html#the-belongs-to-association
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