Passing a variable in an after_update action - ruby-on-rails

Question

I have an UserProfile model:
class UserProfile < ApplicationRecord
after_update :check_changes
def check_changes
AuditRecord.create(account_id: self.id, fields: self.saved_changes , account_type: 'UserProfile', admin_id: 3) if self.saved_changes?
end
id
user_id
name
last_name
1
1
john
doe
2
2
foo
bar
and AuditRecord model:
id
account_type
account_id
field
admin_id
1
UserProfile
1
{}
3
2
UserProfile
2
{}
3
This AuditRecord saves all of the updates of the profiles, but could be updated by different admins.
How can I send to check_changes function the admin_id? Because right now always is going to be 3.

Answer 1

If I understand correctly, you just want to pass an admin_id to AuditRecord, which means you need another model Admin, which is related to AuditRecord in some way.
Start by generating Admin model, set up the appropriate active record association and references.
Rails docs for this
You should be able to access associations now, with something like admin.auditrecords depending upon how you set up the associations.

Answer 2

after_update is called automatically. You can't pass some variables there dynamically
But you can evenly distribute tasks between admins
class AuditRecord < ApplicationRecord
class << self
def most_free_admin_id
select(:admin_id).
group(:admin_id).
order('COUNT (admin_id)').
first.
admin_id
end
end
end
AuditRecord.most_free_admin_id will generate SQL like this
SELECT admin_id
FROM audit_records
GROUP BY admin_id
ORDER BY COUNT (admin_id)
LIMIT 1;
It will return id of the admin who has the least audit records
Also it's better to create such records not after update, but after commit when record is 100% saved in DB. For this purpose after_update_commit is better
Also in Ruby we use self. only in situations where it is impossible without it
Finally you can apply it in the model
class UserProfile < ApplicationRecord
after_update_commit :check_changes
private
def check_changes
AuditRecord.create(
account_id: id,
fields: saved_changes,
account_type: 'UserProfile',
admin_id: AuditRecord.most_free_admin_id
)
end
end